实现MyBatis Mapper XML文件增量动态刷新，自动加载，热加载，热部署

实现MyBatis Mapper XML文件增量动态刷新，自动加载，热加载，热部署

• 博客分类：
• Java
• MyBatis

阅读更多

    最初启动服务后Mapper XML文件，必须重启服务才能生效，这样就大大影响了我们的开发效率。

    网上同学们也有实现类似功能，但都是全部清空，全部刷新XML，这样硬件消耗比较严重，加载时间也比较长。我们只修改了几行SQL就没有必要全部加载，只需要加载修改的问题就行了。

    后来为了急需解决这个问题，进行修改MyBatis源码实现Mapper XML增量刷新，直接覆盖方式实现，使用classloader的加载机制优先加载，并应用到了jeesite中，但是经过MyBatis几次升级后，不得不需要重新修改，部署也麻烦，入侵性太强。

    周末有幸又重新研究下源代码将刷新部分，分离出来，实现MyBatis Mapper文件动态重新加载，只加载修改的文件，今天分享出来，不多说，看源码，注释很详细： 

Java代码  

1. /** 
2.  * Copyright (c) 2012-Now https://github.com/thinkgem/jeesite. 
3.  */  
4. package com.thinkgem.jeesite.mybatis.thread;  
5.   
6. import java.io.File;  
7. import java.io.FileInputStream;  
8. import java.io.FileNotFoundException;  
9. import java.io.InputStream;  
10. import java.lang.reflect.Field;  
11. import java.util.ArrayList;  
12. import java.util.HashMap;  
13. import java.util.List;  
14. import java.util.Map;  
15. import java.util.Properties;  
16. import java.util.Set;  
17.   
18. import org.apache.commons.lang3.StringUtils;  
19. import org.apache.ibatis.builder.xml.XMLMapperBuilder;  
20. import org.apache.ibatis.executor.ErrorContext;  
21. import org.apache.ibatis.session.Configuration;  
22. import org.apache.log4j.Logger;  
23. import org.springframework.core.NestedIOException;  
24. import org.springframework.core.io.Resource;  
25.   
26. import com.google.common.collect.Sets;  
27.   
28. /** 
29.  * 刷新MyBatis Mapper XML 线程 
30.  * @author ThinkGem 
31.  * @version 2016-5-29 
32.  */  
33. public class MapperRefresh implements java.lang.Runnable {  
34.   
35.     public static Logger log = Logger.getLogger(MapperRefresh.class);  
36.   
37.     private static String filename = "/mybatis-refresh.properties";  
38.     private static Properties prop = new Properties();  
39.   
40.     private static boolean enabled;         // 是否启用Mapper刷新线程功能  
41.     private static boolean refresh;         // 刷新启用后，是否启动了刷新线程  
42.       
43.     private Set<String> location;         // Mapper实际资源路径  
44.       
45.     private Resource[] mapperLocations;     // Mapper资源路径  
46.     private Configuration configuration;        // MyBatis配置对象  
47.       
48.     private Long beforeTime = 0L;           // 上一次刷新时间  
49.     private static int delaySeconds;        // 延迟刷新秒数  
50.     private static int sleepSeconds;        // 休眠时间  
51.     private static String mappingPath;      // xml文件夹匹配字符串，需要根据需要修改  
52.   
53.     static {  
54.           
55.         try {  
56.             prop.load(MapperRefresh.class.getResourceAsStream(filename));  
57.         } catch (Exception e) {  
58.             e.printStackTrace();  
59.             System.out.println("Load mybatis-refresh “"+filename+"” file error.");  
60.         }  
61.   
62.         enabled = "true".equalsIgnoreCase(getPropString("enabled"));  
63.           
64.         delaySeconds = getPropInt("delaySeconds");  
65.         sleepSeconds = getPropInt("sleepSeconds");  
66.         mappingPath = getPropString("mappingPath");  
67.   
68.         delaySeconds = delaySeconds == 0 ? 50 : delaySeconds;  
69.         sleepSeconds = sleepSeconds == 0 ? 3 : sleepSeconds;  
70.         mappingPath = StringUtils.isBlank(mappingPath) ? "mappings" : mappingPath;  
71.   
72.         log.debug("[enabled] " + enabled);  
73.         log.debug("[delaySeconds] " + delaySeconds);  
74.         log.debug("[sleepSeconds] " + sleepSeconds);  
75.         log.debug("[mappingPath] " + mappingPath);  
76.     }  
77.   
78.     public static boolean isRefresh() {  
79.         return refresh;  
80.     }  
81.   
82.     public MapperRefresh(Resource[] mapperLocations, Configuration configuration) {  
83.         this.mapperLocations = mapperLocations;  
84.         this.configuration = configuration;  
85.     }  
86.   
87.     @Override  
88.     public void run() {  
89.   
90.         beforeTime = System.currentTimeMillis();  
91.   
92.         log.debug("[location] " + location);  
93.         log.debug("[configuration] " + configuration);  
94.   
95.         if (enabled) {  
96.             // 启动刷新线程  
97.             final MapperRefresh runnable = this;  
98.             new Thread(new java.lang.Runnable() {  
99.                 @Override  
100.                 public void run() {  
101.                       
102.                     if (location == null){  
103.                         location = Sets.newHashSet();  
104.                         log.debug("MapperLocation's length:" + mapperLocations.length);  
105.                         for (Resource mapperLocation : mapperLocations) {  
106.                             String s = mapperLocation.toString().replaceAll("\\\\", "/");  
107.                             s = s.substring("file [".length(), s.lastIndexOf(mappingPath) + mappingPath.length());  
108.                             if (!location.contains(s)) {  
109.                                 location.add(s);  
110.                                 log.debug("Location:" + s);  
111.                             }  
112.                         }  
113.                         log.debug("Locarion's size:" + location.size());  
114.                     }  
115.   
116.                     try {  
117.                         Thread.sleep(delaySeconds * 1000);  
118.                     } catch (InterruptedException e2) {  
119.                         e2.printStackTrace();  
120.                     }  
121.                     refresh = true;  
122.   
123.                     System.out.println("========= Enabled refresh mybatis mapper =========");  
124.   
125.                     while (true) {  
126.                         try {  
127.                             for (String s : location) {  
128.                                 runnable.refresh(s, beforeTime);  
129.                             }  
130.                         } catch (Exception e1) {  
131.                             e1.printStackTrace();  
132.                         }  
133.                         try {  
134.                             Thread.sleep(sleepSeconds * 1000);  
135.                         } catch (InterruptedException e) {  
136.                             e.printStackTrace();  
137.                         }  
138.   
139.                     }  
140.                 }  
141.             }, "MyBatis-Mapper-Refresh").start();  
142.         }  
143.     }  
144.   
145.     /** 
146.      * 执行刷新 
147.      * @param filePath 刷新目录 
148.      * @param beforeTime 上次刷新时间 
149.      * @throws NestedIOException 解析异常 
150.      * @throws FileNotFoundException 文件未找到 
151.      * @author ThinkGem 
152.      */  
153.     @SuppressWarnings({ "rawtypes", "unchecked" })  
154.     private void refresh(String filePath, Long beforeTime) throws Exception {  
155.   
156.         // 本次刷新时间  
157.         Long refrehTime = System.currentTimeMillis();  
158.   
159.         // 获取需要刷新的Mapper文件列表  
160.         List<File> fileList = this.getRefreshFile(new File(filePath), beforeTime);  
161.         if (fileList.size() > 0) {  
162.             log.debug("Refresh file: " + fileList.size());  
163.         }  
164.         for (int i = 0; i < fileList.size(); i++) {  
165.             InputStream inputStream = new FileInputStream(fileList.get(i));  
166.             String resource = fileList.get(i).getAbsolutePath();  
167.             try {  
168.                   
169.                 // 清理原有资源，更新为自己的StrictMap方便，增量重新加载  
170.                 String[] mapFieldNames = new String[]{  
171.                     "mappedStatements", "caches",  
172.                     "resultMaps", "parameterMaps",  
173.                     "keyGenerators", "sqlFragments"  
174.                 };  
175.                 for (String fieldName : mapFieldNames){  
176.                     Field field = configuration.getClass().getDeclaredField(fieldName);  
177.                     field.setAccessible(true);  
178.                     Map map = ((Map)field.get(configuration));  
179.                     if (!(map instanceof StrictMap)){  
180.                         Map newMap = new StrictMap(StringUtils.capitalize(fieldName) + "collection");  
181.                         for (Object key : map.keySet()){  
182.                             try {  
183.                                 newMap.put(key, map.get(key));  
184.                             }catch(IllegalArgumentException ex){  
185.                                 newMap.put(key, ex.getMessage());  
186.                             }  
187.                         }  
188.                         field.set(configuration, newMap);  
189.                     }  
190.                 }  
191.                   
192.                 // 清理已加载的资源标识，方便让它重新加载。  
193.                 Field loadedResourcesField = configuration.getClass().getDeclaredField("loadedResources");  
194.                 loadedResourcesField.setAccessible(true);  
195.                 Set loadedResourcesSet = ((Set)loadedResourcesField.get(configuration));  
196.                 loadedResourcesSet.remove(resource);  
197.                   
198.                 //重新编译加载资源文件。  
199.                 XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(inputStream, configuration,   
200.                         resource, configuration.getSqlFragments());  
201.                 xmlMapperBuilder.parse();  
202.             } catch (Exception e) {  
203.                 throw new NestedIOException("Failed to parse mapping resource: '" + resource + "'", e);  
204.             } finally {  
205.                 ErrorContext.instance().reset();  
206.             }  
207.             System.out.println("Refresh file: " + mappingPath + StringUtils.substringAfterLast(fileList.get(i).getAbsolutePath(), mappingPath));  
208.             if (log.isDebugEnabled()) {  
209.                 log.debug("Refresh file: " + fileList.get(i).getAbsolutePath());  
210.                 log.debug("Refresh filename: " + fileList.get(i).getName());  
211.             }  
212.         }  
213.         // 如果刷新了文件，则修改刷新时间，否则不修改  
214.         if (fileList.size() > 0) {  
215.             this.beforeTime = refrehTime;  
216.         }  
217.     }  
218.       
219.     /** 
220.      * 获取需要刷新的文件列表 
221.      * @param dir 目录 
222.      * @param beforeTime 上次刷新时间 
223.      * @return 刷新文件列表 
224.      */  
225.     private List<File> getRefreshFile(File dir, Long beforeTime) {  
226.         List<File> fileList = new ArrayList<File>();  
227.   
228.         File[] files = dir.listFiles();  
229.         if (files != null) {  
230.             for (int i = 0; i < files.length; i++) {  
231.                 File file = files[i];  
232.                 if (file.isDirectory()) {  
233.                     fileList.addAll(this.getRefreshFile(file, beforeTime));  
234.                 } else if (file.isFile()) {  
235.                     if (this.checkFile(file, beforeTime)) {  
236.                         fileList.add(file);  
237.                     }  
238.                 } else {  
239.                     System.out.println("Error file." + file.getName());  
240.                 }  
241.             }  
242.         }  
243.         return fileList;  
244.     }  
245.   
246.     /** 
247.      * 判断文件是否需要刷新 
248.      * @param file 文件 
249.      * @param beforeTime 上次刷新时间 
250.      * @return 需要刷新返回true，否则返回false 
251.      */  
252.     private boolean checkFile(File file, Long beforeTime) {  
253.         if (file.lastModified() > beforeTime) {  
254.             return true;  
255.         }  
256.         return false;  
257.     }  
258.   
259.     /** 
260.      * 获取整数属性 
261.      * @param key 
262.      * @return 
263.      */  
264.     private static int getPropInt(String key) {  
265.         int i = 0;  
266.         try {  
267.             i = Integer.parseInt(getPropString(key));  
268.         } catch (Exception e) {  
269.         }  
270.         return i;  
271.     }  
272.   
273.     /** 
274.      * 获取字符串属性 
275.      * @param key 
276.      * @return 
277.      */  
278.     private static String getPropString(String key) {  
279.         return prop == null ? null : prop.getProperty(key);  
280.     }  
281.   
282.     /** 
283.      * 重写 org.apache.ibatis.session.Configuration.StrictMap 类 
284.      * 来自 MyBatis3.4.0版本，修改 put 方法，允许反复 put更新。 
285.      */  
286.     public static class StrictMap<V> extends HashMap<String, V> {  
287.   
288.         private static final long serialVersionUID = -4950446264854982944L;  
289.         private String name;  
290.   
291.         public StrictMap(String name, int initialCapacity, float loadFactor) {  
292.             super(initialCapacity, loadFactor);  
293.             this.name = name;  
294.         }  
295.   
296.         public StrictMap(String name, int initialCapacity) {  
297.             super(initialCapacity);  
298.             this.name = name;  
299.         }  
300.   
301.         public StrictMap(String name) {  
302.             super();  
303.             this.name = name;  
304.         }  
305.   
306.         public StrictMap(String name, Map<String, ? extends V> m) {  
307.             super(m);  
308.             this.name = name;  
309.         }  
310.   
311.         @SuppressWarnings("unchecked")  
312.         public V put(String key, V value) {  
313.             // ThinkGem 如果现在状态为刷新，则刷新(先删除后添加)  
314.             if (MapperRefresh.isRefresh()) {  
315.                 remove(key);  
316.                 MapperRefresh.log.debug("refresh key:" + key.substring(key.lastIndexOf(".") + 1));  
317.             }  
318.             // ThinkGem end  
319.             if (containsKey(key)) {  
320.                 throw new IllegalArgumentException(name + " already contains value for " + key);  
321.             }  
322.             if (key.contains(".")) {  
323.                 final String shortKey = getShortName(key);  
324.                 if (super.get(shortKey) == null) {  
325.                     super.put(shortKey, value);  
326.                 } else {  
327.                     super.put(shortKey, (V) new Ambiguity(shortKey));  
328.                 }  
329.             }  
330.             return super.put(key, value);  
331.         }  
332.   
333.         public V get(Object key) {  
334.             V value = super.get(key);  
335.             if (value == null) {  
336.                 throw new IllegalArgumentException(name + " does not contain value for " + key);  
337.             }  
338.             if (value instanceof Ambiguity) {  
339.                 throw new IllegalArgumentException(((Ambiguity) value).getSubject() + " is ambiguous in " + name  
340.                         + " (try using the full name including the namespace, or rename one of the entries)");  
341.             }  
342.             return value;  
343.         }  
344.   
345.         private String getShortName(String key) {  
346.             final String[] keyparts = key.split("\\.");  
347.             return keyparts[keyparts.length - 1];  
348.         }  
349.   
350.         protected static class Ambiguity {  
351.             private String subject;  
352.   
353.             public Ambiguity(String subject) {  
354.                 this.subject = subject;  
355.             }  
356.   
357.             public String getSubject() {  
358.                 return subject;  
359.             }  
360.         }  
361.     }  
362. }  

/**
 * Copyright (c) 2012-Now https://github.com/thinkgem/jeesite.
 */
package com.thinkgem.jeesite.mybatis.thread;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.session.Configuration;
import org.apache.log4j.Logger;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;

import com.google.common.collect.Sets;

/**

• 刷新MyBatis Mapper XML 线程

• @author ThinkGem

• @version 2016-5-29
  */
  public class MapperRefresh implements java.lang.Runnable {

  public static Logger log = Logger.getLogger(MapperRefresh.class);

  private static String filename = “/mybatis-refresh.properties”;
  private static Properties prop = new Properties();

  private static boolean enabled; // 是否启用Mapper刷新线程功能
  private static boolean refresh; // 刷新启用后，是否启动了刷新线程

  private Set<String> location; // Mapper实际资源路径

  private Resource[] mapperLocations; // Mapper资源路径
  private Configuration configuration; // MyBatis配置对象

  private Long beforeTime = 0L; // 上一次刷新时间
  private static int delaySeconds; // 延迟刷新秒数
  private static int sleepSeconds; // 休眠时间
  private static String mappingPath; // xml文件夹匹配字符串，需要根据需要修改

  static {

   try {
   	prop.load(MapperRefresh.class.getResourceAsStream(filename));
   } catch (Exception e) {
   	e.printStackTrace();
   	System.out.println("Load mybatis-refresh “"+filename+"” file error.");
   }
  
   enabled = "true".equalsIgnoreCase(getPropString("enabled"));
   
   delaySeconds = getPropInt("delaySeconds");
   sleepSeconds = getPropInt("sleepSeconds");
   mappingPath = getPropString("mappingPath");
  
   delaySeconds = delaySeconds == 0 ? 50 : delaySeconds;
   sleepSeconds = sleepSeconds == 0 ? 3 : sleepSeconds;
   mappingPath = StringUtils.isBlank(mappingPath) ? "mappings" : mappingPath;
  
   log.debug("[enabled] " + enabled);
   log.debug("[delaySeconds] " + delaySeconds);
   log.debug("[sleepSeconds] " + sleepSeconds);
   log.debug("[mappingPath] " + mappingPath);
  

  }

  public static boolean isRefresh() {
  return refresh;
  }

  public MapperRefresh(Resource[] mapperLocations, Configuration configuration) {
  this.mapperLocations = mapperLocations;
  this.configuration = configuration;
  }

  @Override
  public void run() {

   beforeTime = System.currentTimeMillis();
  
   log.debug("[location] " + location);
   log.debug("[configuration] " + configuration);
  
   if (enabled) {
   	// 启动刷新线程
   	final MapperRefresh runnable = this;
   	new Thread(new java.lang.Runnable() {
   		@Override
   		public void run() {
   			
   			if (location == null){
   				location = Sets.newHashSet();
   				log.debug("MapperLocation's length:" + mapperLocations.length);
   				for (Resource mapperLocation : mapperLocations) {
   					String s = mapperLocation.toString().replaceAll("\\\\", "/");
   					s = s.substring("file [".length(), s.lastIndexOf(mappingPath) + mappingPath.length());
   					if (!location.contains(s)) {
   						location.add(s);
   						log.debug("Location:" + s);
   					}
   				}
   				log.debug("Locarion's size:" + location.size());
   			}
  
   			try {
   				Thread.sleep(delaySeconds * 1000);
   			} catch (InterruptedException e2) {
   				e2.printStackTrace();
   			}
   			refresh = true;
  
   			System.out.println("========= Enabled refresh mybatis mapper =========");
  
   			while (true) {
   				try {
   					for (String s : location) {
   						runnable.refresh(s, beforeTime);
   					}
   				} catch (Exception e1) {
   					e1.printStackTrace();
   				}
   				try {
   					Thread.sleep(sleepSeconds * 1000);
   				} catch (InterruptedException e) {
   					e.printStackTrace();
   				}
  
   			}
   		}
   	}, "MyBatis-Mapper-Refresh").start();
   }
  

  }

  /**

  • 执行刷新

  • @param filePath 刷新目录

  • @param beforeTime 上次刷新时间

  • @throws NestedIOException 解析异常

  • @throws FileNotFoundException 文件未找到

  • @author ThinkGem
    */
    @SuppressWarnings({ “rawtypes”, “unchecked” })
    private void refresh(String filePath, Long beforeTime) throws Exception {

    // 本次刷新时间
    Long refrehTime = System.currentTimeMillis();

    // 获取需要刷新的Mapper文件列表
    List<File> fileList = this.getRefreshFile(new File(filePath), beforeTime);
    if (fileList.size() > 0) {
    log.debug("Refresh file: " + fileList.size());
    }
    for (int i = 0; i < fileList.size(); i++) {
    InputStream inputStream = new FileInputStream(fileList.get(i));
    String resource = fileList.get(i).getAbsolutePath();
    try {

     	// 清理原有资源，更新为自己的StrictMap方便，增量重新加载
     	String[] mapFieldNames = new String[]{
     		"mappedStatements", "caches",
     		"resultMaps", "parameterMaps",
     		"keyGenerators", "sqlFragments"
     	};
     	for (String fieldName : mapFieldNames){
     		Field field = configuration.getClass().getDeclaredField(fieldName);
     		field.setAccessible(true);
     		Map map = ((Map)field.get(configuration));
     		if (!(map instanceof StrictMap)){
     			Map newMap = new StrictMap(StringUtils.capitalize(fieldName) + "collection");
     			for (Object key : map.keySet()){
     				try {
     					newMap.put(key, map.get(key));
     				}catch(IllegalArgumentException ex){
     					newMap.put(key, ex.getMessage());
     				}
     			}
     			field.set(configuration, newMap);
     		}
     	}
     	
     	// 清理已加载的资源标识，方便让它重新加载。
     	Field loadedResourcesField = configuration.getClass().getDeclaredField("loadedResources");
     	loadedResourcesField.setAccessible(true);
     	Set loadedResourcesSet = ((Set)loadedResourcesField.get(configuration));
     	loadedResourcesSet.remove(resource);
     	
     	//重新编译加载资源文件。
     	XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(inputStream, configuration, 
     			resource, configuration.getSqlFragments());
     	xmlMapperBuilder.parse();
     } catch (Exception e) {
     	throw new NestedIOException("Failed to parse mapping resource: '" + resource + "'", e);
     } finally {
     	ErrorContext.instance().reset();
     }
     System.out.println("Refresh file: " + mappingPath + StringUtils.substringAfterLast(fileList.get(i).getAbsolutePath(), mappingPath));
     if (log.isDebugEnabled()) {
     	log.debug("Refresh file: " + fileList.get(i).getAbsolutePath());
     	log.debug("Refresh filename: " + fileList.get(i).getName());
     }
    

    }
    // 如果刷新了文件，则修改刷新时间，否则不修改
    if (fileList.size() > 0) {
    this.beforeTime = refrehTime;
    }
    }

  /**

  • 获取需要刷新的文件列表

  • @param dir 目录

  • @param beforeTime 上次刷新时间

  • @return 刷新文件列表
    */
    private List<File> getRefreshFile(File dir, Long beforeTime) {
    List<File> fileList = new ArrayList<File>();

    File[] files = dir.listFiles();
    if (files != null) {
    for (int i = 0; i < files.length; i++) {
    File file = files[i];
    if (file.isDirectory()) {
    fileList.addAll(this.getRefreshFile(file, beforeTime));
    } else if (file.isFile()) {
    if (this.checkFile(file, beforeTime)) {
    fileList.add(file);
    }
    } else {
    System.out.println(“Error file.” + file.getName());
    }
    }
    }
    return fileList;
    }

  /**

  • 判断文件是否需要刷新
  • @param file 文件
  • @param beforeTime 上次刷新时间
  • @return 需要刷新返回true，否则返回false
    */
    private boolean checkFile(File file, Long beforeTime) {
    if (file.lastModified() > beforeTime) {
    return true;
    }
    return false;
    }

  /**

  • 获取整数属性
  • @param key
  • @return
    */
    private static int getPropInt(String key) {
    int i = 0;
    try {
    i = Integer.parseInt(getPropString(key));
    } catch (Exception e) {
    }
    return i;
    }

  /**

  • 获取字符串属性
  • @param key
  • @return
    */
    private static String getPropString(String key) {
    return prop == null ? null : prop.getProperty(key);
    }

  /**

  • 重写 org.apache.ibatis.session.Configuration.StrictMap 类

  • 来自 MyBatis3.4.0版本，修改 put 方法，允许反复 put更新。
    */
    public static class StrictMap<V> extends HashMap<String, V> {

    private static final long serialVersionUID = -4950446264854982944L;
    private String name;

    public StrictMap(String name, int initialCapacity, float loadFactor) {
    super(initialCapacity, loadFactor);
    this.name = name;
    }

    public StrictMap(String name, int initialCapacity) {
    super(initialCapacity);
    this.name = name;
    }

    public StrictMap(String name) {
    super();
    this.name = name;
    }

    public StrictMap(String name, Map<String, ? extends V> m) {
    super(m);
    this.name = name;
    }

    @SuppressWarnings(“unchecked”)
    public V put(String key, V value) {
    // ThinkGem 如果现在状态为刷新，则刷新(先删除后添加)
    if (MapperRefresh.isRefresh()) {
    remove(key);
    MapperRefresh.log.debug(“refresh key:” + key.substring(key.lastIndexOf(".") + 1));
    }
    // ThinkGem end
    if (containsKey(key)) {
    throw new IllegalArgumentException(name + " already contains value for " + key);
    }
    if (key.contains(".")) {
    final String shortKey = getShortName(key);
    if (super.get(shortKey) == null) {
    super.put(shortKey, value);
    } else {
    super.put(shortKey, (V) new Ambiguity(shortKey));
    }
    }
    return super.put(key, value);
    }

    public V get(Object key) {
    V value = super.get(key);
    if (value == null) {
    throw new IllegalArgumentException(name + " does not contain value for " + key);
    }
    if (value instanceof Ambiguity) {
    throw new IllegalArgumentException(((Ambiguity) value).getSubject() + " is ambiguous in " + name
    + " (try using the full name including the namespace, or rename one of the entries)");
    }
    return value;
    }

    private String getShortName(String key) {
    final String[] keyparts = key.split("\.");
    return keyparts[keyparts.length - 1];
    }

    protected static class Ambiguity {
    private String subject;

     public Ambiguity(String subject) {
     	this.subject = subject;
     }
    
     public String getSubject() {
     	return subject;
     }
    

    }
    }
    }
    

 

 MyBatis有几个不太好的地方，是当实体类别名重名的时候，Mapper XML有错误的时候，系统启动时会一直等待无法正常启动（其实是加载失败后又重新加载，进入了死循环），这里我也顺便重写下SqlSessionFactoryBean.java文件，解决这个问题，在这个文件里也加入启动上面写的线程类：

 

 1、修改实体类重名的时候抛出并打印异常，否则系统会一直递归造成无法启动。

 2、MapperXML有错误的时候抛出并打印异常，否则系统会一直递归造成无法启动。

 3、加入启动MapperRefresh.java线程服务。 

Java代码  

1. /** 
2.  *    Copyright 2010-2015 the original author or authors. 
3.  * 
4.  *    Licensed under the Apache License, Version 2.0 (the "License"); 
5.  *    you may not use this file except in compliance with the License. 
6.  *    You may obtain a copy of the License at 
7.  * 
8.  *       http://www.apache.org/licenses/LICENSE-2.0 
9.  * 
10.  *    Unless required by applicable law or agreed to in writing, software 
11.  *    distributed under the License is distributed on an "AS IS" BASIS, 
12.  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
13.  *    See the License for the specific language governing permissions and 
14.  *    limitations under the License. 
15.  */  
16. package com.thinkgem.jeesite.mybatis.spring;  
17.   
18. import static org.springframework.util.Assert.notNull;  
19. import static org.springframework.util.ObjectUtils.isEmpty;  
20. import static org.springframework.util.StringUtils.hasLength;  
21. import static org.springframework.util.StringUtils.tokenizeToStringArray;  
22.   
23. import java.io.IOException;  
24. import java.sql.SQLException;  
25. import java.util.Properties;  
26.   
27. import javax.sql.DataSource;  
28.   
29. import org.apache.ibatis.builder.xml.XMLConfigBuilder;  
30. import org.apache.ibatis.builder.xml.XMLMapperBuilder;  
31. import org.apache.ibatis.executor.ErrorContext;  
32. import org.apache.ibatis.logging.Log;  
33. import org.apache.ibatis.logging.LogFactory;  
34. import org.apache.ibatis.mapping.DatabaseIdProvider;  
35. import org.apache.ibatis.mapping.Environment;  
36. import org.apache.ibatis.plugin.Interceptor;  
37. import org.apache.ibatis.reflection.factory.ObjectFactory;  
38. import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;  
39. import org.apache.ibatis.session.Configuration;  
40. import org.apache.ibatis.session.SqlSessionFactory;  
41. import org.apache.ibatis.session.SqlSessionFactoryBuilder;  
42. import org.apache.ibatis.transaction.TransactionFactory;  
43. import org.apache.ibatis.type.TypeHandler;  
44. import org.mybatis.spring.transaction.SpringManagedTransactionFactory;  
45. import org.springframework.beans.factory.FactoryBean;  
46. import org.springframework.beans.factory.InitializingBean;  
47. import org.springframework.context.ApplicationEvent;  
48. import org.springframework.context.ApplicationListener;  
49. import org.springframework.context.ConfigurableApplicationContext;  
50. import org.springframework.context.event.ContextRefreshedEvent;  
51. import org.springframework.core.NestedIOException;  
52. import org.springframework.core.io.Resource;  
53. import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;  
54.   
55. import com.thinkgem.jeesite.common.mybatis.thread.MapperRefresh;  
56.   
57. /** 
58.  * {@code FactoryBean} that creates an MyBatis {@code SqlSessionFactory}. 
59.  * This is the usual way to set up a shared MyBatis {@code SqlSessionFactory} in a Spring application context; 
60.  * the SqlSessionFactory can then be passed to MyBatis-based DAOs via dependency injection. 
61.  * 
62.  * Either {@code DataSourceTransactionManager} or {@code JtaTransactionManager} can be used for transaction 
63.  * demarcation in combination with a {@code SqlSessionFactory}. JTA should be used for transactions 
64.  * which span multiple databases or when container managed transactions (CMT) are being used. 
65.  * 
66.  * @author Putthibong Boonbong 
67.  * @author Hunter Presnall 
68.  * @author Eduardo Macarron 
69.  *  
70.  * @see #setConfigLocation 
71.  * @see #setDataSource 
72.  * @version $Id$ 
73.  * @modify ThinkGem 2016-5-24 来自 MyBatisSpring1.2.3版本 
74.  */  
75. public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> {  
76.   
77.   private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);  
78.   
79.   private Resource configLocation;  
80.   
81.   private Resource[] mapperLocations;  
82.   
83.   private DataSource dataSource;  
84.   
85.   private TransactionFactory transactionFactory;  
86.   
87.   private Properties configurationProperties;  
88.   
89.   private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();  
90.   
91.   private SqlSessionFactory sqlSessionFactory;  
92.   
93.   //EnvironmentAware requires spring 3.1  
94.   private String environment = SqlSessionFactoryBean.class.getSimpleName();  
95.   
96.   private boolean failFast;  
97.   
98.   private Interceptor[] plugins;  
99.   
100.   private TypeHandler<?>[] typeHandlers;  
101.   
102.   private String typeHandlersPackage;  
103.   
104.   private Class<?>[] typeAliases;  
105.   
106.   private String typeAliasesPackage;  
107.   
108.   private Class<?> typeAliasesSuperType;  
109.   
110.   //issue #19. No default provider.  
111.   private DatabaseIdProvider databaseIdProvider;  
112.   
113.   private ObjectFactory objectFactory;  
114.   
115.   private ObjectWrapperFactory objectWrapperFactory;  
116.   
117.   /** 
118.    * Sets the ObjectFactory. 
119.    *  
120.    * @since 1.1.2 
121.    * @param objectFactory 
122.    */  
123.   public void setObjectFactory(ObjectFactory objectFactory) {  
124.     this.objectFactory = objectFactory;  
125.   }  
126.   
127.   /** 
128.    * Sets the ObjectWrapperFactory. 
129.    *  
130.    * @since 1.1.2 
131.    * @param objectWrapperFactory 
132.    */  
133.   public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory) {  
134.     this.objectWrapperFactory = objectWrapperFactory;  
135.   }  
136.   
137.   /** 
138.    * Gets the DatabaseIdProvider 
139.    * 
140.    * @since 1.1.0 
141.    * @return 
142.    */  
143.   public DatabaseIdProvider getDatabaseIdProvider() {  
144.     return databaseIdProvider;  
145.   }  
146.   
147.   /** 
148.    * Sets the DatabaseIdProvider. 
149.    * As of version 1.2.2 this variable is not initialized by default.  
150.    * 
151.    * @since 1.1.0 
152.    * @param databaseIdProvider 
153.    */  
154.   public void setDatabaseIdProvider(DatabaseIdProvider databaseIdProvider) {  
155.     this.databaseIdProvider = databaseIdProvider;  
156.   }  
157.   
158.   /** 
159.    * Mybatis plugin list. 
160.    * 
161.    * @since 1.0.1 
162.    * 
163.    * @param plugins list of plugins 
164.    * 
165.    */  
166.   public void setPlugins(Interceptor[] plugins) {  
167.     this.plugins = plugins;  
168.   }  
169.   
170.   /** 
171.    * Packages to search for type aliases. 
172.    * 
173.    * @since 1.0.1 
174.    * 
175.    * @param typeAliasesPackage package to scan for domain objects 
176.    * 
177.    */  
178.   public void setTypeAliasesPackage(String typeAliasesPackage) {  
179.     this.typeAliasesPackage = typeAliasesPackage;  
180.   }  
181.   
182.   /** 
183.    * Super class which domain objects have to extend to have a type alias created. 
184.    * No effect if there is no package to scan configured. 
185.    * 
186.    * @since 1.1.2 
187.    * 
188.    * @param typeAliasesSuperType super class for domain objects 
189.    * 
190.    */  
191.   public void setTypeAliasesSuperType(Class<?> typeAliasesSuperType) {  
192.     this.typeAliasesSuperType = typeAliasesSuperType;  
193.   }  
194.   
195.   /** 
196.    * Packages to search for type handlers. 
197.    * 
198.    * @since 1.0.1 
199.    * 
200.    * @param typeHandlersPackage package to scan for type handlers 
201.    * 
202.    */  
203.   public void setTypeHandlersPackage(String typeHandlersPackage) {  
204.     this.typeHandlersPackage = typeHandlersPackage;  
205.   }  
206.   
207.   /** 
208.    * Set type handlers. They must be annotated with {@code MappedTypes} and optionally with {@code MappedJdbcTypes} 
209.    * 
210.    * @since 1.0.1 
211.    * 
212.    * @param typeHandlers Type handler list 
213.    */  
214.   public void setTypeHandlers(TypeHandler<?>[] typeHandlers) {  
215.     this.typeHandlers = typeHandlers;  
216.   }  
217.   
218.   /** 
219.    * List of type aliases to register. They can be annotated with {@code Alias} 
220.    * 
221.    * @since 1.0.1 
222.    * 
223.    * @param typeAliases Type aliases list 
224.    */  
225.   public void setTypeAliases(Class<?>[] typeAliases) {  
226.     this.typeAliases = typeAliases;  
227.   }  
228.   
229.   /** 
230.    * If true, a final check is done on Configuration to assure that all mapped 
231.    * statements are fully loaded and there is no one still pending to resolve 
232.    * includes. Defaults to false. 
233.    * 
234.    * @since 1.0.1 
235.    * 
236.    * @param failFast enable failFast 
237.    */  
238.   public void setFailFast(boolean failFast) {  
239.     this.failFast = failFast;  
240.   }  
241.   
242.   /** 
243.    * Set the location of the MyBatis {@code SqlSessionFactory} config file. A typical value is 
244.    * "WEB-INF/mybatis-configuration.xml". 
245.    */  
246.   public void setConfigLocation(Resource configLocation) {  
247.     this.configLocation = configLocation;  
248.   }  
249.   
250.   /** 
251.    * Set locations of MyBatis mapper files that are going to be merged into the {@code SqlSessionFactory} 
252.    * configuration at runtime. 
253.    * 
254.    * This is an alternative to specifying "&lt;sqlmapper&gt;" entries in an MyBatis config file. 
255.    * This property being based on Spring's resource abstraction also allows for specifying 
256.    * resource patterns here: e.g. "classpath*:sqlmap/*-mapper.xml". 
257.    */  
258.   public void setMapperLocations(Resource[] mapperLocations) {  
259.     this.mapperLocations = mapperLocations;  
260.   }  
261.   
262.   /** 
263.    * Set optional properties to be passed into the SqlSession configuration, as alternative to a 
264.    * {@code &lt;properties&gt;} tag in the configuration xml file. This will be used to 
265.    * resolve placeholders in the config file. 
266.    */  
267.   public void setConfigurationProperties(Properties sqlSessionFactoryProperties) {  
268.     this.configurationProperties = sqlSessionFactoryProperties;  
269.   }  
270.   
271.   /** 
272.    * Set the JDBC {@code DataSource} that this instance should manage transactions for. The {@code DataSource} 
273.    * should match the one used by the {@code SqlSessionFactory}: for example, you could specify the same 
274.    * JNDI DataSource for both. 
275.    * 
276.    * A transactional JDBC {@code Connection} for this {@code DataSource} will be provided to application code 
277.    * accessing this {@code DataSource} directly via {@code DataSourceUtils} or {@code DataSourceTransactionManager}. 
278.    * 
279.    * The {@code DataSource} specified here should be the target {@code DataSource} to manage transactions for, not 
280.    * a {@code TransactionAwareDataSourceProxy}. Only data access code may work with 
281.    * {@code TransactionAwareDataSourceProxy}, while the transaction manager needs to work on the 
282.    * underlying target {@code DataSource}. If there's nevertheless a {@code TransactionAwareDataSourceProxy} 
283.    * passed in, it will be unwrapped to extract its target {@code DataSource}. 
284.    * 
285.    */  
286.   public void setDataSource(DataSource dataSource) {  
287.     if (dataSource instanceof TransactionAwareDataSourceProxy) {  
288.       // If we got a TransactionAwareDataSourceProxy, we need to perform  
289.       // transactions for its underlying target DataSource, else data  
290.       // access code won't see properly exposed transactions (i.e.  
291.       // transactions for the target DataSource).  
292.       this.dataSource = ((TransactionAwareDataSourceProxy) dataSource).getTargetDataSource();  
293.     } else {  
294.       this.dataSource = dataSource;  
295.     }  
296.   }  
297.   
298.   /** 
299.    * Sets the {@code SqlSessionFactoryBuilder} to use when creating the {@code SqlSessionFactory}. 
300.    * 
301.    * This is mainly meant for testing so that mock SqlSessionFactory classes can be injected. By 
302.    * default, {@code SqlSessionFactoryBuilder} creates {@code DefaultSqlSessionFactory} instances. 
303.    * 
304.    */  
305.   public void setSqlSessionFactoryBuilder(SqlSessionFactoryBuilder sqlSessionFactoryBuilder) {  
306.     this.sqlSessionFactoryBuilder = sqlSessionFactoryBuilder;  
307.   }  
308.   
309.   /** 
310.    * Set the MyBatis TransactionFactory to use. Default is {@code SpringManagedTransactionFactory} 
311.    * 
312.    * The default {@code SpringManagedTransactionFactory} should be appropriate for all cases: 
313.    * be it Spring transaction management, EJB CMT or plain JTA. If there is no active transaction, 
314.    * SqlSession operations will execute SQL statements non-transactionally. 
315.    * 
316.    * <b>It is strongly recommended to use the default {@code TransactionFactory}.</b> If not used, any 
317.    * attempt at getting an SqlSession through Spring's MyBatis framework will throw an exception if 
318.    * a transaction is active. 
319.    * 
320.    * @see SpringManagedTransactionFactory 
321.    * @param transactionFactory the MyBatis TransactionFactory 
322.    */  
323.   public void setTransactionFactory(TransactionFactory transactionFactory) {  
324.     this.transactionFactory = transactionFactory;  
325.   }  
326.   
327.   /** 
328.    * <b>NOTE:</b> This class <em>overrides</em> any {@code Environment} you have set in the MyBatis 
329.    * config file. This is used only as a placeholder name. The default value is 
330.    * {@code SqlSessionFactoryBean.class.getSimpleName()}. 
331.    * 
332.    * @param environment the environment name 
333.    */  
334.   public void setEnvironment(String environment) {  
335.     this.environment = environment;  
336.   }  
337.   
338.   /** 
339.    * {@inheritDoc} 
340.    */  
341.   @Override  
342.   public void afterPropertiesSet() throws Exception {  
343.     notNull(dataSource, "Property 'dataSource' is required");  
344.     notNull(sqlSessionFactoryBuilder, "Property 'sqlSessionFactoryBuilder' is required");  
345.   
346.     this.sqlSessionFactory = buildSqlSessionFactory();  
347.   }  
348.   
349.   /** 
350.    * Build a {@code SqlSessionFactory} instance. 
351.    * 
352.    * The default implementation uses the standard MyBatis {@code XMLConfigBuilder} API to build a 
353.    * {@code SqlSessionFactory} instance based on an Reader. 
354.    * 
355.    * @return SqlSessionFactory 
356.    * @throws IOException if loading the config file failed 
357.    */  
358.   protected SqlSessionFactory buildSqlSessionFactory() throws IOException {  
359.   
360.     Configuration configuration;  
361.   
362.     XMLConfigBuilder xmlConfigBuilder = null;  
363.     if (this.configLocation != null) {  
364.       xmlConfigBuilder = new XMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties);  
365.       configuration = xmlConfigBuilder.getConfiguration();  
366.     } else {  
367.       if (LOGGER.isDebugEnabled()) {  
368.         LOGGER.debug("Property 'configLocation' not specified, using default MyBatis Configuration");  
369.       }  
370.       configuration = new Configuration();  
371.       configuration.setVariables(this.configurationProperties);  
372.     }  
373.   
374.     if (this.objectFactory != null) {  
375.       configuration.setObjectFactory(this.objectFactory);  
376.     }  
377.   
378.     if (this.objectWrapperFactory != null) {  
379.       configuration.setObjectWrapperFactory(this.objectWrapperFactory);  
380.     }  
381.   
382.     if (hasLength(this.typeAliasesPackage)) {  
383.       String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage,  
384.           ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);  
385.       for (String packageToScan : typeAliasPackageArray) {  
386.         // ThinkGem 修改实体类重名的时候抛出并打印异常，否则系统会一直递归造成无法启动  
387.         try {  
388.             configuration.getTypeAliasRegistry().registerAliases(packageToScan,  
389.                     typeAliasesSuperType == null ? Object.class : typeAliasesSuperType);  
390.         } catch (Exception ex) {  
391.             LOGGER.error("Scanned package: '" + packageToScan + "' for aliases", ex);  
392.             throw new NestedIOException("Scanned package: '" + packageToScan + "' for aliases", ex);  
393.         } finally {  
394.             ErrorContext.instance().reset();  
395.         }  
396.         // ThinkGem end  
397.         if (LOGGER.isDebugEnabled()) {  
398.           LOGGER.debug("Scanned package: '" + packageToScan + "' for aliases");  
399.         }  
400.       }  
401.     }  
402.   
403.     if (!isEmpty(this.typeAliases)) {  
404.       for (Class<?> typeAlias : this.typeAliases) {  
405.         configuration.getTypeAliasRegistry().registerAlias(typeAlias);  
406.         if (LOGGER.isDebugEnabled()) {  
407.           LOGGER.debug("Registered type alias: '" + typeAlias + "'");  
408.         }  
409.       }  
410.     }  
411.   
412.     if (!isEmpty(this.plugins)) {  
413.       for (Interceptor plugin : this.plugins) {  
414.         configuration.addInterceptor(plugin);  
415.         if (LOGGER.isDebugEnabled()) {  
416.           LOGGER.debug("Registered plugin: '" + plugin + "'");  
417.         }  
418.       }  
419.     }  
420.   
421.     if (hasLength(this.typeHandlersPackage)) {  
422.       String[] typeHandlersPackageArray = tokenizeToStringArray(this.typeHandlersPackage,  
423.           ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);  
424.       for (String packageToScan : typeHandlersPackageArray) {  
425.         configuration.getTypeHandlerRegistry().register(packageToScan);  
426.         if (LOGGER.isDebugEnabled()) {  
427.           LOGGER.debug("Scanned package: '" + packageToScan + "' for type handlers");  
428.         }  
429.       }  
430.     }  
431.   
432.     if (!isEmpty(this.typeHandlers)) {  
433.       for (TypeHandler<?> typeHandler : this.typeHandlers) {  
434.         configuration.getTypeHandlerRegistry().register(typeHandler);  
435.         if (LOGGER.isDebugEnabled()) {  
436.           LOGGER.debug("Registered type handler: '" + typeHandler + "'");  
437.         }  
438.       }  
439.     }  
440.   
441.     if (xmlConfigBuilder != null) {  
442.       try {  
443.         xmlConfigBuilder.parse();  
444.   
445.         if (LOGGER.isDebugEnabled()) {  
446.           LOGGER.debug("Parsed configuration file: '" + this.configLocation + "'");  
447.         }  
448.       } catch (Exception ex) {  
449.         throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);  
450.       } finally {  
451.         ErrorContext.instance().reset();  
452.       }  
453.     }  
454.   
455.     if (this.transactionFactory == null) {  
456.       this.transactionFactory = new SpringManagedTransactionFactory();  
457.     }  
458.   
459.     configuration.setEnvironment(new Environment(this.environment, this.transactionFactory, this.dataSource));  
460.   
461.     if (this.databaseIdProvider != null) {  
462.       try {  
463.         configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));  
464.       } catch (SQLException e) {  
465.         throw new NestedIOException("Failed getting a databaseId", e);  
466.       }  
467.     }  
468.   
469.     if (!isEmpty(this.mapperLocations)) {  
470.       for (Resource mapperLocation : this.mapperLocations) {  
471.         if (mapperLocation == null) {  
472.           continue;  
473.         }  
474.   
475.         try {  
476.           XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(),  
477.               configuration, mapperLocation.toString(), configuration.getSqlFragments());  
478.           xmlMapperBuilder.parse();  
479.         } catch (Exception e) {  
480.             // ThinkGem MapperXML有错误的时候抛出并打印异常，否则系统会一直递归造成无法启动  
481.             LOGGER.error("Failed to parse mapping resource: '" + mapperLocation + "'", e);  
482.             throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e);  
483.         } finally {  
484.           ErrorContext.instance().reset();  
485.         }  
486.   
487.         if (LOGGER.isDebugEnabled()) {  
488.           LOGGER.debug("Parsed mapper file: '" + mapperLocation + "'");  
489.         }  
490.       }  
491.         
492.       // ThinkGem 启动刷新MapperXML定时器（有助于开发者调试）。  
493.       new MapperRefresh(this.mapperLocations, configuration).run();  
494.         
495.     } else {  
496.       if (LOGGER.isDebugEnabled()) {  
497.         LOGGER.debug("Property 'mapperLocations' was not specified or no matching resources found");  
498.       }  
499.     }  
500.   
501.     return this.sqlSessionFactoryBuilder.build(configuration);  
502.   }  
503.   
504.   /** 
505.    * {@inheritDoc} 
506.    */  
507.   @Override  
508.   public SqlSessionFactory getObject() throws Exception {  
509.     if (this.sqlSessionFactory == null) {  
510.       afterPropertiesSet();  
511.     }  
512.   
513.     return this.sqlSessionFactory;  
514.   }  
515.   
516.   /** 
517.    * {@inheritDoc} 
518.    */  
519.   @Override  
520.   public Class<? extends SqlSessionFactory> getObjectType() {  
521.     return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();  
522.   }  
523.   
524.   /** 
525.    * {@inheritDoc} 
526.    */  
527.   @Override  
528.   public boolean isSingleton() {  
529.     return true;  
530.   }  
531.   
532.   /** 
533.    * {@inheritDoc} 
534.    */  
535.   @Override  
536.   public void onApplicationEvent(ApplicationEvent event) {  
537.     if (failFast && event instanceof ContextRefreshedEvent) {  
538.       // fail-fast -> check all statements are completed  
539.       this.sqlSessionFactory.getConfiguration().getMappedStatementNames();  
540.     }  
541.   }  
542.   
543. }   

/**
 *    Copyright 2010-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package com.thinkgem.jeesite.mybatis.spring;

import static org.springframework.util.Assert.notNull;
import static org.springframework.util.ObjectUtils.isEmpty;
import static org.springframework.util.StringUtils.hasLength;
import static org.springframework.util.StringUtils.tokenizeToStringArray;

import java.io.IOException;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.ibatis.builder.xml.XMLConfigBuilder;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.type.TypeHandler;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;

import com.thinkgem.jeesite.common.mybatis.thread.MapperRefresh;

/**

• {@code FactoryBean} that creates an MyBatis {@code SqlSessionFactory}.
• This is the usual way to set up a shared MyBatis {@code SqlSessionFactory} in a Spring application context;
• the SqlSessionFactory can then be passed to MyBatis-based DAOs via dependency injection.
• Either {@code DataSourceTransactionManager} or {@code JtaTransactionManager} can be used for transaction
• demarcation in combination with a {@code SqlSessionFactory}. JTA should be used for transactions
• which span multiple databases or when container managed transactions (CMT) are being used.
• @author Putthibong Boonbong
• @author Hunter Presnall
• @author Eduardo Macarron
• @see #setConfigLocation
• @see #setDataSource
• @version $Id$
• @modify ThinkGem 2016-5-24 来自 MyBatisSpring1.2.3版本
  */
  public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> {

private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);

private Resource configLocation;

private Resource[] mapperLocations;

private DataSource dataSource;

private TransactionFactory transactionFactory;

private Properties configurationProperties;

private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();

private SqlSessionFactory sqlSessionFactory;

//EnvironmentAware requires spring 3.1
private String environment = SqlSessionFactoryBean.class.getSimpleName();

private boolean failFast;

private Interceptor[] plugins;

private TypeHandler<?>[] typeHandlers;

private String typeHandlersPackage;

private Class<?>[] typeAliases;

private String typeAliasesPackage;

private Class<?> typeAliasesSuperType;

//issue #19. No default provider.
private DatabaseIdProvider databaseIdProvider;

private ObjectFactory objectFactory;

private ObjectWrapperFactory objectWrapperFactory;

/**

• Sets the ObjectFactory.
• @since 1.1.2
• @param objectFactory
  */
  public void setObjectFactory(ObjectFactory objectFactory) {
  this.objectFactory = objectFactory;
  }

/**

• Sets the ObjectWrapperFactory.
• @since 1.1.2
• @param objectWrapperFactory
  */
  public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory) {
  this.objectWrapperFactory = objectWrapperFactory;
  }

/**

• Gets the DatabaseIdProvider
• @since 1.1.0
• @return
  */
  public DatabaseIdProvider getDatabaseIdProvider() {
  return databaseIdProvider;
  }

/**

• Sets the DatabaseIdProvider.
• As of version 1.2.2 this variable is not initialized by default.
• @since 1.1.0
• @param databaseIdProvider
  */
  public void setDatabaseIdProvider(DatabaseIdProvider databaseIdProvider) {
  this.databaseIdProvider = databaseIdProvider;
  }

/**

• Mybatis plugin list.
• @since 1.0.1
• @param plugins list of plugins

*/
public void setPlugins(Interceptor[] plugins) {
this.plugins = plugins;
}

/**

• Packages to search for type aliases.
• @since 1.0.1
• @param typeAliasesPackage package to scan for domain objects

*/
public void setTypeAliasesPackage(String typeAliasesPackage) {
this.typeAliasesPackage = typeAliasesPackage;
}

/**

• Super class which domain objects have to extend to have a type alias created.
• No effect if there is no package to scan configured.
• @since 1.1.2
• @param typeAliasesSuperType super class for domain objects

*/
public void setTypeAliasesSuperType(Class<?> typeAliasesSuperType) {
this.typeAliasesSuperType = typeAliasesSuperType;
}

/**

• Packages to search for type handlers.
• @since 1.0.1
• @param typeHandlersPackage package to scan for type handlers

*/
public void setTypeHandlersPackage(String typeHandlersPackage) {
this.typeHandlersPackage = typeHandlersPackage;
}

/**

• Set type handlers. They must be annotated with {@code MappedTypes} and optionally with {@code MappedJdbcTypes}
• @since 1.0.1
• @param typeHandlers Type handler list
  */
  public void setTypeHandlers(TypeHandler<?>[] typeHandlers) {
  this.typeHandlers = typeHandlers;
  }

/**

• List of type aliases to register. They can be annotated with {@code Alias}
• @since 1.0.1
• @param typeAliases Type aliases list
  */
  public void setTypeAliases(Class<?>[] typeAliases) {
  this.typeAliases = typeAliases;
  }

/**

• If true, a final check is done on Configuration to assure that all mapped
• statements are fully loaded and there is no one still pending to resolve
• includes. Defaults to false.
• @since 1.0.1
• @param failFast enable failFast
  */
  public void setFailFast(boolean failFast) {
  this.failFast = failFast;
  }

/**

• Set the location of the MyBatis {@code SqlSessionFactory} config file. A typical value is
• “WEB-INF/mybatis-configuration.xml”.
  */
  public void setConfigLocation(Resource configLocation) {
  this.configLocation = configLocation;
  }

/**

• Set locations of MyBatis mapper files that are going to be merged into the {@code SqlSessionFactory}
• configuration at runtime.
• This is an alternative to specifying “&lt;sqlmapper&gt;” entries in an MyBatis config file.
• This property being based on Spring’s resource abstraction also allows for specifying
• resource patterns here: e.g. “classpath*:sqlmap/*-mapper.xml”.
  */
  public void setMapperLocations(Resource[] mapperLocations) {
  this.mapperLocations = mapperLocations;
  }

/**

• Set optional properties to be passed into the SqlSession configuration, as alternative to a
• {@code &lt;properties&gt;} tag in the configuration xml file. This will be used to
• resolve placeholders in the config file.
  */
  public void setConfigurationProperties(Properties sqlSessionFactoryProperties) {
  this.configurationProperties = sqlSessionFactoryProperties;
  }

/**

• Set the JDBC {@code DataSource} that this instance should manage transactions for. The {@code DataSource}
• should match the one used by the {@code SqlSessionFactory}: for example, you could specify the same
• JNDI DataSource for both.
• A transactional JDBC {@code Connection} for this {@code DataSource} will be provided to application code
• accessing this {@code DataSource} directly via {@code DataSourceUtils} or {@code DataSourceTransactionManager}.
• The {@code DataSource} specified here should be the target {@code DataSource} to manage transactions for, not
• a {@code TransactionAwareDataSourceProxy}. Only data access code may work with
• {@code TransactionAwareDataSourceProxy}, while the transaction manager needs to work on the
• underlying target {@code DataSource}. If there’s nevertheless a {@code TransactionAwareDataSourceProxy}
• passed in, it will be unwrapped to extract its target {@code DataSource}.

*/
public void setDataSource(DataSource dataSource) {
if (dataSource instanceof TransactionAwareDataSourceProxy) {
// If we got a TransactionAwareDataSourceProxy, we need to perform
// transactions for its underlying target DataSource, else data
// access code won’t see properly exposed transactions (i.e.
// transactions for the target DataSource).
this.dataSource = ((TransactionAwareDataSourceProxy) dataSource).getTargetDataSource();
} else {
this.dataSource = dataSource;
}
}

/**

• Sets the {@code SqlSessionFactoryBuilder} to use when creating the {@code SqlSessionFactory}.
• This is mainly meant for testing so that mock SqlSessionFactory classes can be injected. By
• default, {@code SqlSessionFactoryBuilder} creates {@code DefaultSqlSessionFactory} instances.

*/
public void setSqlSessionFactoryBuilder(SqlSessionFactoryBuilder sqlSessionFactoryBuilder) {
this.sqlSessionFactoryBuilder = sqlSessionFactoryBuilder;
}

/**

• Set the MyBatis TransactionFactory to use. Default is {@code SpringManagedTransactionFactory}
• The default {@code SpringManagedTransactionFactory} should be appropriate for all cases:
• be it Spring transaction management, EJB CMT or plain JTA. If there is no active transaction,
• SqlSession operations will execute SQL statements non-transactionally.
• <b>It is strongly recommended to use the default {@code TransactionFactory}.</b> If not used, any
• attempt at getting an SqlSession through Spring’s MyBatis framework will throw an exception if
• a transaction is active.
• @see SpringManagedTransactionFactory
• @param transactionFactory the MyBatis TransactionFactory
  */
  public void setTransactionFactory(TransactionFactory transactionFactory) {
  this.transactionFactory = transactionFactory;
  }

/**

• <b>NOTE:</b> This class <em>overrides</em> any {@code Environment} you have set in the MyBatis
• config file. This is used only as a placeholder name. The default value is
• {@code SqlSessionFactoryBean.class.getSimpleName()}.
• @param environment the environment name
  */
  public void setEnvironment(String environment) {
  this.environment = environment;
  }

/**

• {@inheritDoc}
  */
  @Override
  public void afterPropertiesSet() throws Exception {
  notNull(dataSource, “Property ‘dataSource’ is required”);
  notNull(sqlSessionFactoryBuilder, “Property ‘sqlSessionFactoryBuilder’ is required”);

this.sqlSessionFactory = buildSqlSessionFactory();

}

/**

• Build a {@code SqlSessionFactory} instance.
• The default implementation uses the standard MyBatis {@code XMLConfigBuilder} API to build a
• {@code SqlSessionFactory} instance based on an Reader.
• @return SqlSessionFactory
• @throws IOException if loading the config file failed
  */
  protected SqlSessionFactory buildSqlSessionFactory() throws IOException {

Configuration configuration;

XMLConfigBuilder xmlConfigBuilder = null;
if (this.configLocation != null) {
  xmlConfigBuilder = new XMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties);
  configuration = xmlConfigBuilder.getConfiguration();
} else {
  if (LOGGER.isDebugEnabled()) {
    LOGGER.debug("Property 'configLocation' not specified, using default MyBatis Configuration");
  }
  configuration = new Configuration();
  configuration.setVariables(this.configurationProperties);
}

if (this.objectFactory != null) {
  configuration.setObjectFactory(this.objectFactory);
}

if (this.objectWrapperFactory != null) {
  configuration.setObjectWrapperFactory(this.objectWrapperFactory);
}

if (hasLength(this.typeAliasesPackage)) {
  String[] typeAliasPackageArray = tokenizeToStringArray(this.typeAliasesPackage,
      ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
  for (String packageToScan : typeAliasPackageArray) {
	// ThinkGem 修改实体类重名的时候抛出并打印异常，否则系统会一直递归造成无法启动
	try {
		configuration.getTypeAliasRegistry().registerAliases(packageToScan,
				typeAliasesSuperType == null ? Object.class : typeAliasesSuperType);
	} catch (Exception ex) {
		LOGGER.error("Scanned package: '" + packageToScan + "' for aliases", ex);
		throw new NestedIOException("Scanned package: '" + packageToScan + "' for aliases", ex);
	} finally {
		ErrorContext.instance().reset();
	}
	// ThinkGem end
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Scanned package: '" + packageToScan + "' for aliases");
    }
  }
}

if (!isEmpty(this.typeAliases)) {
  for (Class<?> typeAlias : this.typeAliases) {
    configuration.getTypeAliasRegistry().registerAlias(typeAlias);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Registered type alias: '" + typeAlias + "'");
    }
  }
}

if (!isEmpty(this.plugins)) {
  for (Interceptor plugin : this.plugins) {
    configuration.addInterceptor(plugin);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Registered plugin: '" + plugin + "'");
    }
  }
}

if (hasLength(this.typeHandlersPackage)) {
  String[] typeHandlersPackageArray = tokenizeToStringArray(this.typeHandlersPackage,
      ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
  for (String packageToScan : typeHandlersPackageArray) {
    configuration.getTypeHandlerRegistry().register(packageToScan);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Scanned package: '" + packageToScan + "' for type handlers");
    }
  }
}

if (!isEmpty(this.typeHandlers)) {
  for (TypeHandler<?> typeHandler : this.typeHandlers) {
    configuration.getTypeHandlerRegistry().register(typeHandler);
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Registered type handler: '" + typeHandler + "'");
    }
  }
}

if (xmlConfigBuilder != null) {
  try {
    xmlConfigBuilder.parse();

    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Parsed configuration file: '" + this.configLocation + "'");
    }
  } catch (Exception ex) {
    throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);
  } finally {
    ErrorContext.instance().reset();
  }
}

if (this.transactionFactory == null) {
  this.transactionFactory = new SpringManagedTransactionFactory();
}

configuration.setEnvironment(new Environment(this.environment, this.transactionFactory, this.dataSource));

if (this.databaseIdProvider != null) {
  try {
    configuration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));
  } catch (SQLException e) {
    throw new NestedIOException("Failed getting a databaseId", e);
  }
}

if (!isEmpty(this.mapperLocations)) {
  for (Resource mapperLocation : this.mapperLocations) {
    if (mapperLocation == null) {
      continue;
    }

    try {
      XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(),
          configuration, mapperLocation.toString(), configuration.getSqlFragments());
      xmlMapperBuilder.parse();
    } catch (Exception e) {
		// ThinkGem MapperXML有错误的时候抛出并打印异常，否则系统会一直递归造成无法启动
    	LOGGER.error("Failed to parse mapping resource: '" + mapperLocation + "'", e);
    	throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e);
    } finally {
      ErrorContext.instance().reset();
    }

    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug("Parsed mapper file: '" + mapperLocation + "'");
    }
  }
  
  // ThinkGem 启动刷新MapperXML定时器（有助于开发者调试）。
  new MapperRefresh(this.mapperLocations, configuration).run();
  
} else {
  if (LOGGER.isDebugEnabled()) {
    LOGGER.debug("Property 'mapperLocations' was not specified or no matching resources found");
  }
}

return this.sqlSessionFactoryBuilder.build(configuration);

}

/**

• {@inheritDoc}
  */
  @Override
  public SqlSessionFactory getObject() throws Exception {
  if (this.sqlSessionFactory == null) {
  afterPropertiesSet();
  }

return this.sqlSessionFactory;

}

/**

• {@inheritDoc}
  */
  @Override
  public Class<? extends SqlSessionFactory> getObjectType() {
  return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();
  }

/**

• {@inheritDoc}
  */
  @Override
  public boolean isSingleton() {
  return true;
  }

/**

• {@inheritDoc}
  */
  @Override
  public void onApplicationEvent(ApplicationEvent event) {
  if (failFast && event instanceof ContextRefreshedEvent) {
  // fail-fast -> check all statements are completed
  this.sqlSessionFactory.getConfiguration().getMappedStatementNames();
  }
  }

} 

重写SqlSessionFactoryBean就的修改下Spring的MyBatis配置部分： 

Xml代码  

1. <!-- MyBatis SqlSessionFactoryBean -->  
2.     <bean id="sqlSessionFactory" class="com.thinkgem.jeesite.common.mybatis.spring.SqlSessionFactoryBean">  
3.         <property name="dataSource" ref="dataSource"/>  
4.         <property name="typeAliasesPackage" value="com.thinkgem.jeesite"/>  
5.         <property name="typeAliasesSuperType" value="<span style="line-height: 1.5;">com.thinkgem.jeesite</span><span style="line-height: 1.5;">.persistence.BaseEntity"/></span>  
6.         <property name="mapperLocations" value="classpath*:/mappings/**/*.xml"/>  
7.         <property name="configLocation" value="classpath:/mybatis-config.xml"></property>  
8.     </bean>  

<!-- MyBatis SqlSessionFactoryBean -->
    <bean id="sqlSessionFactory" class="com.thinkgem.jeesite.common.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.thinkgem.jeesite"/>
        <property name="typeAliasesSuperType" value="com.thinkgem.jeesite.persistence.BaseEntity"/>
        <property name="mapperLocations" value="classpath*:/mappings/**/*.xml"/>
		<property name="configLocation" value="classpath:/mybatis-config.xml"></property>
    </bean>

 

 最后附加上属性配置文件：mybatis-refresh.properties

Java代码  

1. #是否开启刷新线程  
2. enabled=true  
3. #延迟启动刷新程序的秒数  
4. delaySeconds=60  
5. #刷新扫描间隔的时长秒数  
6. sleepSeconds=3  
7. #扫描Mapper文件的资源路径  
8. mappingPath=mappings  

#是否开启刷新线程
enabled=true
#延迟启动刷新程序的秒数
delaySeconds=60
#刷新扫描间隔的时长秒数
sleepSeconds=3
#扫描Mapper文件的资源路径
mappingPath=mappings

 

 

Java你会用，但这10点实战经验你一定不知道！

8大企业级实战项目提炼，总200+课时，限时助学2折特惠，立省4688元！

<div id="share_weibo">分享到：
  <a data-type="sina" href="javascript:;" title="分享到新浪微博"><img src="/images/sina.jpg"></a>
  <a data-type="qq" href="javascript:;" title="分享到腾讯微博"><img src="/images/tec.jpg"></a>
</div>

JeeSite 4.0 规划（一） | Java如何正确地写出单例模式

• 2016-06-13 10:40
• 浏览 26246
• 评论(9)

•   <li>分类:<a href="https://www.iteye.com/blogs/category/architecture">企业架构</a></li>      
    <li class="last"><a href="https://www.iteye.com/wiki/blog/2304557" target="_blank" class="more">查看更多</a></li>
  </ul>    
  

评论

9 楼 u010199866 2018-06-07  

2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [enabled] true
2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [delaySeconds] 60
2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [sleepSeconds] 3
2018-06-07   15:42:44   [com.cjis.util.MapperRefresh]-[DEBUG]   [mappingPath] com/cjis/mapping
2018-06-07   15:42:51   [com.cjis.util.MapperRefresh]-[DEBUG]   [location] null
2018-06-07   15:42:52   [com.cjis.util.MapperRefresh]-[DEBUG]   [configuration] org.apache.ibatis.session.Configuration@9367551
Exception in thread "MyBatis-Mapper-Refresh" java.lang.NoClassDefFoundError: com/google/common/collect/Sets
at com.cjis.util.MapperRefresh$1.run(MapperRefresh.java:101)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Sets
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
... 2 more


按照楼主的操作，报错呢  请问这是为啥

8 楼 juxiaojun114 2018-03-04  

jeesite 使用idea导入开发，启动tomcat后为啥看不到========= Enabled refresh mybatis mapper =========  这个提示信息  使用eclipse没有这个问题，是我的idea设置有问题吗？

7 楼 aaddsfdsfsdfs 2017-12-18  

真心给个赞，可以的，忒提高开发效率了，配合自己写的通用后台框架，所有业务逻辑直接用js写的话，一次部署，后面基本都是热部署了，满意

6 楼 lovewinner 2017-04-17  

5 楼 空城旧梦已秋凉 2016-11-29  

为何不了解一下nutz框架

4 楼 zhugeyangyang1994 2016-06-18  

围观 大神

3 楼 agen19866 2016-06-16  

MyBatis SqlSessionFactoryBean

文件第5行一定要这样写么？

2 楼 8465279130 2016-06-15  

  赞!!!

1 楼 greatpwx 2016-06-13  

发表评论

您还没有登录,请您登录后再发表评论

相关资源推荐

• 					<li class="news-recommends-ajax">
            
            <a href="https://download.youkuaiyun.com/download/qq_38686665/10202917" data-track-click="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/qq_38686665/10202917,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="mybatis热部署mapper增量更新."><em class="related_suggestion_highlight">mybatis</em><em class="related_suggestion_highlight">热部署</em><em class="related_suggestion_highlight">mapper</em><em class="related_suggestion_highlight">增量</em>更新.</a>
            <p>
              通常项目中如果修改<em class="related_suggestion_highlight">mapper</em>.<em class="related_suggestion_highlight">xml文件</em> 就要重启服务器才生效.本资源直接换包即用.<em class="related_suggestion_highlight">实现</em><em class="related_suggestion_highlight">热部署</em>
            </p>
  					</li>
  			
  					<li class="news-recommends-ajax">
            
            <a href="https://blog.youkuaiyun.com/baochanghong/article/details/51939115" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/baochanghong/article/details/51939115,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="实现MyBatis Mapper XML文件增量动态刷新，自动加载，热加载，热部署"><em class="related_suggestion_highlight">实现</em><em class="related_suggestion_highlight">MyBatis</em> <em class="related_suggestion_highlight">Mapper</em> <em class="related_suggestion_highlight">XML文件</em><em class="related_suggestion_highlight">增量</em><em class="related_suggestion_highlight">动态刷新</em>，<em class="related_suggestion_highlight">自动加载</em>，<em class="related_suggestion_highlight">热加载</em>，<em class="related_suggestion_highlight">热部署</em></a>
            <p>
              最初启动服务后<em class="related_suggestion_highlight">Mapper</em>&nbsp;<em class="related_suggestion_highlight">XML文件</em>，必须重启服务才能生效，这样就大大影响了我们的开发效率。
  

    网上同学们也有实现类似功能，但都是全部清空，全部刷新XML，这样硬件消耗比较严重，加载时间也比较长。我们只修改了几行SQL就没有必要全部加载，只需要加载修改的问题就行了。

    后来为了急需解决这个问题，进行修改MyBatis源码实现Mapper XML增量刷新，直接覆盖方式实现，

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/LOVELONG8808/article/details/78738086" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/LOVELONG8808/article/details/78738086,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="mybatis热部署加载*Mapper.xml文件，手动刷新*Mapper.xml文件"><em class="related_suggestion_highlight">mybatis</em><em class="related_suggestion_highlight">热部署</em>加载*<em class="related_suggestion_highlight">Mapper</em>.<em class="related_suggestion_highlight">xml文件</em>，手动刷新*<em class="related_suggestion_highlight">Mapper</em>.<em class="related_suggestion_highlight">xml文件</em></a>
          <p>
            由于项目已经发布到线上，要是修改一个<em class="related_suggestion_highlight">Mapper</em>.<em class="related_suggestion_highlight">xml文件</em>的话，需要重启整个服务，这个是很耗时间的，而且在一段时间内导致服务不可用，严重影响用户

的体验度。所以希望可以有一个机制可以，当修改某个mapper.xml的时候，只要重新加载这个mapper.xml就好了，参考网上的一些资料和demo，加上一些
自己的总结，下面的代码是通过测试的，可以供你们参考和使用。
import java.i

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/CS568591377/article/details/37935571" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/CS568591377/article/details/37935571,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="mybatis热部署加载*Mapper.xml文件"><em class="related_suggestion_highlight">mybatis</em><em class="related_suggestion_highlight">热部署</em>加载*<em class="related_suggestion_highlight">Mapper</em>.<em class="related_suggestion_highlight">xml文件</em></a>
          <p>
            
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/sinat_35626559/article/details/80988053" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/sinat_35626559/article/details/80988053,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="Spring学习——手动实现Mapper.xml文件的热部署">Spring学习——手动<em class="related_suggestion_highlight">实现</em><em class="related_suggestion_highlight">Mapper</em>.<em class="related_suggestion_highlight">xml文件</em>的<em class="related_suggestion_highlight">热部署</em></a>
          <p>
            原文转载自：https://blog.youkuaiyun.com/lovelong8808/article/details/78738086

 

转载使用后，根据实际情况有做部分修改，感谢原文博主提供的刷新方法。

注意，目前该方法只支持全量刷新，即刷新指定路径下的所有Mapper.xml文件，不支持仅刷新修改后的部分Mapper.xml。

 

由于项目已经发布到线上，要是修改一个Mapper.xm…

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/qq_38686665/article/details/79046328" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/qq_38686665/article/details/79046328,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="超简单的mybatis的mapper文件增量热部署">超简单的<em class="related_suggestion_highlight">mybatis</em>的<em class="related_suggestion_highlight">mapper</em>文件<em class="related_suggestion_highlight">增量</em><em class="related_suggestion_highlight">热部署</em></a>
          <p>
            通常项目中如果修改<em class="related_suggestion_highlight">mapper</em>.<em class="related_suggestion_highlight">xml文件</em> 就要重启服务器才生效。网上虽然都有类似的教程，但是很多都是根本用不了.或者每次都是全量更新.本文基于http://blog.youkuaiyun.com/chunge48596/article/details/53539126?locationNum=1&amp;fps=1的方法上更进一步优化,直接<em class="related_suggestion_highlight">实现</em>换包即用.

原文中对SqlSessionFactoryBean.cla

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/u014780287/article/details/78800697" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/u014780287/article/details/78800697,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/u014780287/article/details/78800697,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="Mybatis的xml修改后自动刷新(不改源码)"><em class="related_suggestion_highlight">Mybatis</em>的xml修改后自动刷新(不改源码)</a>
          <p>
            思路来自于网络大神的启发，后来发现需要改源码对系统继承不太方便。尝试了一下发现<em class="related_suggestion_highlight">mybatis</em>已经给我们留下了足够多的可扩展点。
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/iteye_14109/article/details/82400826" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/iteye_14109/article/details/82400826,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/iteye_14109/article/details/82400826,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="jrebel下载及配置(tomcat热部署)--修改java类文件、xml文件或properties资源文件自动重新加载...">jrebel下载及配置(tomcat<em class="related_suggestion_highlight">热部署</em>)--修改java类文件、<em class="related_suggestion_highlight">xml文件</em>或properties资源文件自动重新加载...</a>
          <p>
            Jrebel 介绍：

Jrebel 可快速实现热部署，节省了大量重启时间，提高了个人开发效率
JRebel是一款JAVA虚拟机插件，它使得JAVA程序员能在不进行重部署的情况下，即时看到代码的改变对一个应用程序带来的影响。JRebel使你能即时分别看到代码、类和资源的变化，你可以一个个地上传而不是一次性全部部署。当程序员在开发环境中对任何一个类或者资源作出修改的时候，这个变化会直接反应在部署好…

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/chao_1990/article/details/85116284" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/chao_1990/article/details/85116284,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/chao_1990/article/details/85116284,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="Mybatis实现*mapper.xml热部署-分子级更新"><em class="related_suggestion_highlight">Mybatis</em><em class="related_suggestion_highlight">实现</em>*<em class="related_suggestion_highlight">mapper</em>.xml<em class="related_suggestion_highlight">热部署</em>-分子级更新</a>
          <p>
            需求：

项目在开发阶段或是修复bug阶段，会有修改mybatis的mapper.xml的时候，修改一般情况都要重启才能生失效，如果是分布式项目重启有时会耗时很久，都是无尽的等待。如果频繁修改，那么时间都浪费到等待重启的过程。

目标：

实现mybatis的mapper.xml文件修改后热部署，而且只热更新修改了的xml，可以提高重新解析过程的效率。

要求：

尽量满足开闭原则

实现：

…

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/a4475686/article/details/79378000" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/a4475686/article/details/79378000,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/a4475686/article/details/79378000,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="针对IDEA使用JRebel热部署修改mybatis映射文件sql语句热部署失败的解决方案">针对IDEA使用JRebel<em class="related_suggestion_highlight">热部署</em>修改<em class="related_suggestion_highlight">mybatis</em>映射文件sql语句<em class="related_suggestion_highlight">热部署</em>失败的解决方案</a>
          <p>
            &nbsp; &nbsp; 本人开发环境：IDEA(2017.3) JRebel(7.X)&nbsp; &nbsp; 使用过一段时间的IDEA后感觉非常好用，并且搭配JRebel后开发简直非常舒服。但是使用的过程中有个很烦的问题，就是修改sql映射文件时<em class="related_suggestion_highlight">热部署</em>好像没有反应。&nbsp; &nbsp; 这个问题我最后在JRebel官网的论坛上找到了答案，大家可以参考一下。同时，也友情提示一下，也许百度或谷歌搜半天的问题，去官网的论坛里搜一下关键字一下便找到问...
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/Java_Dmz/article/details/83381725" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/Java_Dmz/article/details/83381725,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/Java_Dmz/article/details/83381725,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="Springboot整合mybatis、以及xml配置实例、热部署、打包、跳转、ssl、webapp">Springboot整合<em class="related_suggestion_highlight">mybatis</em>、以及xml配置实例、<em class="related_suggestion_highlight">热部署</em>、打包、跳转、ssl、webapp</a>
          <p>
            整合<em class="related_suggestion_highlight">mybatis</em>：

引入jar包，这个包是dao+server整合，内涵mybatis生成的xml，及mapper接口和bean对象

引入包后，其包的依赖也会下来，所依赖的jar

yml文件配置连接参数，数据源如果有引入jar则还可以配置数据源，mybatis配置mapper接口在哪里，需要文件路径配置/，在配置bean对象在哪里

找到启动类：

mappersc…

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/yaoayao123/article/details/86558908" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/yaoayao123/article/details/86558908,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/yaoayao123/article/details/86558908,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="eclipse jrebel properties,xml等配置文件不能热部署">eclipse jrebel properties,xml等配置文件不能<em class="related_suggestion_highlight">热部署</em></a>
          <p>
            博主是装的jrebel8.2.4最新版本,装完后发现properties,xml等配置文件不能<em class="related_suggestion_highlight">实现</em><em class="related_suggestion_highlight">热部署</em>,google了半天没有找到解决办法…至少到放弃的这一刻,还是没有找到办法,但是有个办法可以一定程度上解决这个问题,如下图操作:

这个办法能够将文件部署到webapp下,但是不能加载到内存中

…

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/Sopp_Li/article/details/79800169" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/Sopp_Li/article/details/79800169,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/Sopp_Li/article/details/79800169,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="SpringBoot整合Mybatis，使用通用mapper插件的时候，热部署报错，如何解决？">SpringBoot整合<em class="related_suggestion_highlight">Mybatis</em>，使用通用<em class="related_suggestion_highlight">mapper</em>插件的时候，<em class="related_suggestion_highlight">热部署</em>报错，如何解决？</a>
          <p>
            SpringBoot整合<em class="related_suggestion_highlight">Mybatis</em>，通用<em class="related_suggestion_highlight">mapper</em>插件<em class="related_suggestion_highlight">热部署</em>报错。。。。。。在使用SpringBoot 整合<em class="related_suggestion_highlight">mybatis</em>的时候，为了减少不必要的代码开发量，我们会使用<em class="related_suggestion_highlight">mybatis</em>的通用<em class="related_suggestion_highlight">mapper</em>插件，tk.<em class="related_suggestion_highlight">mapper</em>，首先引入如下的依赖：&amp;amp;lt;plugin&amp;amp;gt;				&nbsp;&nbsp;&nbsp;&nbsp;&amp;amp;lt;groupId&amp;amp;gt;org.springframework.boot&amp;amp;lt;/groupId&amp;amp;...
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/love_dl_forever/article/details/79106800" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/love_dl_forever/article/details/79106800,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/love_dl_forever/article/details/79106800,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="mac自动加载即热部署">mac<em class="related_suggestion_highlight">自动加载</em>即<em class="related_suggestion_highlight">热部署</em></a>
          <p>
            idea的<em class="related_suggestion_highlight">热部署</em>
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://download.youkuaiyun.com/download/liuming690452074/11181158" data-track-click="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/liuming690452074/11181158,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/liuming690452074/11181158,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="IDEA热部署修改mybatis映射文件工具 jr-ide-intellij-nightly.zip">IDEA<em class="related_suggestion_highlight">热部署</em>修改<em class="related_suggestion_highlight">mybatis</em>映射文件工具 jr-ide-intellij-nightly.zip</a>
          <p>
            IDEA<em class="related_suggestion_highlight">热部署</em>修改<em class="related_suggestion_highlight">mybatis</em>映射文件工具 jr-ide-intellij-nightly.zip
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://download.youkuaiyun.com/download/qinzhengtime/9940461" data-track-click="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/qinzhengtime/9940461,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/qinzhengtime/9940461,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="6.5热部署修改xml不重启">6.5<em class="related_suggestion_highlight">热部署</em>修改xml不重启</a>
          <p>
            6.5<em class="related_suggestion_highlight">热部署</em>修改xml不重启
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://download.youkuaiyun.com/download/mate_ge/10233712" data-track-click="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/mate_ge/10233712,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://download.youkuaiyun.com/download/mate_ge/10233712,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="spring boot中配置mybatis热加载.zip">spring boot中配置<em class="related_suggestion_highlight">mybatis</em><em class="related_suggestion_highlight">热加载</em>.zip</a>
          <p>
            spring boot中配置<em class="related_suggestion_highlight">mybatis</em> xml资源文件<em class="related_suggestion_highlight">热加载</em>的方法以及相关文件
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/qq_32635069/article/details/83655625" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/qq_32635069/article/details/83655625,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/qq_32635069/article/details/83655625,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="springBoot实现配置和实例的热更新，集成Apollo，方法通用">springBoot<em class="related_suggestion_highlight">实现</em>配置和实例的热更新，集成Apollo，方法通用</a>
          <p>
            
          </p>
					</li>
			
					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/xiaoxian8023/article/details/8715837" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/xiaoxian8023/article/details/8715837,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/xiaoxian8023/article/details/8715837,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="web动态部署（热部署）">web动态部署（<em class="related_suggestion_highlight">热部署</em>）</a>
          <p>
            今天跟大家探讨一下关于web动态部署，也就是<em class="related_suggestion_highlight">热部署</em>的问题。说这个之前，先说一个敏捷开发的原则。

【最小发布、增量开发】
我们在做项目时，设定的期限都特别长。总是想第一个版本就想把所有想到的问题都做完，以至于项目一再延期。所以我们应该改变我们的开发策略。采用敏捷开发的方式。

这里我想强调的有2点，1.最小发布。2.增量开发。

对于最小发布，就是要在第一版中把核心功能实现，即立

					<li class="news-recommends-ajax">
          
          <a href="https://blog.youkuaiyun.com/Cs_hnu_scw/article/details/78961232" data-track-click="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/Cs_hnu_scw/article/details/78961232,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" data-track-view="{&quot;con&quot;:&quot;,https://blog.youkuaiyun.com/Cs_hnu_scw/article/details/78961232,-&quot;,&quot;mod&quot;:&quot;popu_712&quot;}" target="_blank" title="手把手教你如何玩转SpringBoot整合MyBatis（全注解开发和热部署及其JSP配置详解）">手把手教你如何玩转SpringBoot整合<em class="related_suggestion_highlight">MyBatis</em>（全注解开发和<em class="related_suggestion_highlight">热部署</em>及其JSP配置详解）</a>
          <p>
            &nbsp;

     当写了前一篇关于SpringBoot的文章之后，有很多朋友就提问说，关于SpringBoot整合Mybatis，还有SpringBoot热部署，并且还有说关于整合JSP配置的一些问题，然后决定写这一篇文章来帮有疑惑的朋友来解决一下问题。（SpringBoot整合Hibernate的使用，及其SpringBoot的基本知识可以参考之前的一篇章  SpringBoot基础学习  ）

…

		</ul>
  </div>