打包JPA动态查询（CriteriaQuery） eq、ge、gt

封装JPA动态查询（CriteriaQuery）

 

JPA动态查询（CriteriaQuery）封装的一段代码:

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1. package com.platform.framework.dao.jpa;  
2.   
3. import java.io.Serializable;  
4. import java.util.ArrayList;  
5. import java.util.Collection;  
6. import java.util.Date;  
7. import java.util.HashMap;  
8. import java.util.Iterator;  
9. import java.util.List;  
10. import java.util.Map;  
11.   
12. import javax.persistence.EntityManager;  
13. import javax.persistence.criteria.CriteriaBuilder;  
14. import javax.persistence.criteria.CriteriaBuilder.In;  
15. import javax.persistence.criteria.CriteriaQuery;  
16. import javax.persistence.criteria.Order;  
17. import javax.persistence.criteria.Predicate;  
18. import javax.persistence.criteria.Root;  
19.   
20. import org.apache.log4j.Logger;  
21.   
22. /** 
23.  * Query基类<br> 
24.  *  
25.  * @describe：封装JPA CriteriaBuilder查询条件 
26.  * @author：lry 
27.  * @since：2014-05-23 
28.  */  
29. @SuppressWarnings({ “unused”, “unchecked”, “rawtypes”, “null”, “hiding” })  
30. public class Query implements Serializable {  
31.   
32.     private static final long serialVersionUID = 5064932771068929342L;  
33.   
34.     private static Logger log = Logger.getLogger(Query.class);  
35.   
36.     private EntityManager entityManager;  
37.   
38.     /** 要查询的模型对象 */  
39.     private Class clazz;  
40.   
41.     /** 查询条件列表 */  
42.     private Root from;  
43.   
44.     private List<Predicate> predicates;  
45.   
46.     private CriteriaQuery criteriaQuery;  
47.   
48.     private CriteriaBuilder criteriaBuilder;  
49.   
50.     /** 排序方式列表 */  
51.     private List<Order> orders;  
52.   
53.     /** 关联模式 */  
54.     private Map<String, Query> subQuery;  
55.   
56.     private Map<String, Query> linkQuery;  
57.   
58.     private String projection;  
59.   
60.     /** 或条件 */  
61.     private List<Query> orQuery;  
62.   
63.     private String groupBy;  
64.   
65.     private Query() {  
66.     }  
67.   
68.     private Query(Class clazz, EntityManager entityManager) {  
69.         this.clazz = clazz;  
70.         this.entityManager = entityManager;  
71.         this.criteriaBuilder = this.entityManager.getCriteriaBuilder();  
72.         this.criteriaQuery = criteriaBuilder.createQuery(this.clazz);  
73.         this.from = criteriaQuery.from(this.clazz);  
74.         this.predicates = new ArrayList();  
75.         this.orders = new ArrayList();  
76.     }  
77.   
78.     /** 通过类创建查询条件 */  
79.     public static Query forClass(Class clazz, EntityManager entityManager) {  
80.         return new Query(clazz, entityManager);  
81.     }  
82.   
83.     /** 增加子查询 */  
84.     private void addSubQuery(String propertyName, Query query) {  
85.         if (this.subQuery == null)  
86.             this.subQuery = new HashMap();  
87.   
88.         if (query.projection == null)  
89.             throw new RuntimeException(“子查询字段未设置”);  
90.   
91.         this.subQuery.put(propertyName, query);  
92.     }  
93.   
94.     private void addSubQuery(Query query) {  
95.         addSubQuery(query.projection, query);  
96.     }  
97.   
98.     /** 增关联查询 */  
99.     public void addLinkQuery(String propertyName, Query query) {  
100.         if (this.linkQuery == null)  
101.             this.linkQuery = new HashMap();  
102.   
103.         this.linkQuery.put(propertyName, query);  
104.     }  
105.   
106.     /** 相等 */  
107.     public void eq(String propertyName, Object value) {  
108.         if (isNullOrEmpty(value))  
109.             return;  
110.         this.predicates.add(criteriaBuilder.equal(from.get(propertyName), value));  
111.     }  
112.   
113.     private boolean isNullOrEmpty(Object value) {  
114.         if (value instanceof String) {  
115.             return value == null || “”.equals(value);  
116.         }  
117.         return value == null;  
118.     }  
119.   
120.     public void or(List<String> propertyName, Object value) {  
121.         if (isNullOrEmpty(value))  
122.             return;  
123.         if ((propertyName == null) || (propertyName.size() == 0))  
124.             return;  
125.         Predicate predicate = criteriaBuilder.or(criteriaBuilder.equal(from.get(propertyName.get(0)), value));  
126.         for (int i = 1; i < propertyName.size(); ++i)  
127.             predicate = criteriaBuilder.or(predicate, criteriaBuilder.equal(from.get(propertyName.get(i)), value));  
128.         this.predicates.add(predicate);  
129.     }  
130.   
131.     public void orLike(List<String> propertyName, String value) {  
132.         if (isNullOrEmpty(value) || (propertyName.size() == 0))  
133.             return;  
134.         if (value.indexOf(“%”) < 0)  
135.             value = ”%” + value + “%”;  
136.         Predicate predicate = criteriaBuilder.or(criteriaBuilder.like(from.get(propertyName.get(0)), value.toString()));  
137.         for (int i = 1; i < propertyName.size(); ++i)  
138.             predicate = criteriaBuilder.or(predicate, criteriaBuilder.like(from.get(propertyName.get(i)), value));  
139.         this.predicates.add(predicate);  
140.     }  
141.   
142.     /** 空 */  
143.     public void isNull(String propertyName) {  
144.         this.predicates.add(criteriaBuilder.isNull(from.get(propertyName)));  
145.     }  
146.   
147.     /** 非空 */  
148.     public void isNotNull(String propertyName) {  
149.         this.predicates.add(criteriaBuilder.isNotNull(from.get(propertyName)));  
150.     }  
151.   
152.     /** 不相等 */  
153.     public void notEq(String propertyName, Object value) {  
154.         if (isNullOrEmpty(value)) {  
155.             return;  
156.         }  
157.         this.predicates.add(criteriaBuilder.notEqual(from.get(propertyName), value));  
158.     }  
159.   
160.     /** 
161.      * not in 
162.      *  
163.      * @param propertyName 
164.      *            属性名称 
165.      * @param value 
166.      *            值集合 
167.      */  
168.     public void notIn(String propertyName, Collection value) {  
169.         if ((value == null) || (value.size() == 0)) {  
170.             return;  
171.         }  
172.         Iterator iterator = value.iterator();  
173.         In in = criteriaBuilder.in(from.get(propertyName));  
174.         while (iterator.hasNext()) {  
175.             in.value(iterator.next());  
176.         }  
177.         this.predicates.add(criteriaBuilder.not(in));  
178.     }  
179.   
180.     /** 
181.      * 模糊匹配 
182.      *  
183.      * @param propertyName 
184.      *            属性名称 
185.      * @param value 
186.      *            属性值 
187.      */  
188.     public void like(String propertyName, String value) {  
189.         if (isNullOrEmpty(value))  
190.             return;  
191.         if (value.indexOf(“%”) < 0)  
192.             value = ”%” + value + “%”;  
193.         this.predicates.add(criteriaBuilder.like(from.get(propertyName), value));  
194.     }  
195.   
196.     /** 
197.      * 时间区间查询 
198.      *  
199.      * @param propertyName 
200.      *            属性名称 
201.      * @param lo 
202.      *            属性起始值 
203.      * @param go 
204.      *            属性结束值 
205.      */  
206.     public void between(String propertyName, Date lo, Date go) {  
207.         if (!isNullOrEmpty(lo) && !isNullOrEmpty(go)) {  
208.             this.predicates.add(criteriaBuilder.between(from.get(propertyName), lo, go));  
209.         }  
210.   
211.         // if (!isNullOrEmpty(lo) && !isNullOrEmpty(go)) {  
212.         // this.predicates.add(criteriaBuilder.lessThan(from.get(propertyName),  
213.         // new DateTime(lo).toString()));  
214.         // }  
215.         // if (!isNullOrEmpty(go)) {  
216.         // this.predicates.add(criteriaBuilder.greaterThan(from.get(propertyName),  
217.         // new DateTime(go).toString()));  
218.         // }  
219.   
220.     }  
221.   
222.     public void between(String propertyName, Number lo, Number go) {  
223.         if (!(isNullOrEmpty(lo)))  
224.             ge(propertyName, lo);  
225.   
226.         if (!(isNullOrEmpty(go)))  
227.             le(propertyName, go);  
228.     }  
229.   
230.     /** 
231.      * 小于等于 
232.      *  
233.      * @param propertyName 
234.      *            属性名称 
235.      * @param value 
236.      *            属性值 
237.      */  
238.     public void le(String propertyName, Number value) {  
239.         if (isNullOrEmpty(value)) {  
240.             return;  
241.         }  
242.         this.predicates.add(criteriaBuilder.le(from.get(propertyName), value));  
243.     }  
244.   
245.     /** 
246.      * 小于 
247.      *  
248.      * @param propertyName 
249.      *            属性名称 
250.      * @param value 
251.      *            属性值 
252.      */  
253.     public void lt(String propertyName, Number value) {  
254.         if (isNullOrEmpty(value)) {  
255.             return;  
256.         }  
257.         this.predicates.add(criteriaBuilder.lt(from.get(propertyName), value));  
258.     }  
259.   
260.     /** 
261.      * 大于等于 
262.      *  
263.      * @param propertyName 
264.      *            属性名称 
265.      * @param value 
266.      *            属性值 
267.      */  
268.     public void ge(String propertyName, Number value) {  
269.         if (isNullOrEmpty(value)) {  
270.             return;  
271.         }  
272.         this.predicates.add(criteriaBuilder.ge(from.get(propertyName), value));  
273.     }  
274.   
275.     /** 
276.      * 大于 
277.      *  
278.      * @param propertyName 
279.      *            属性名称 
280.      * @param value 
281.      *            属性值 
282.      */  
283.     public void gt(String propertyName, Number value) {  
284.         if (isNullOrEmpty(value)) {  
285.             return;  
286.         }  
287.         this.predicates.add(criteriaBuilder.gt(from.get(propertyName), value));  
288.     }  
289.   
290.     /** 
291.      * in 
292.      *  
293.      * @param propertyName 
294.      *            属性名称 
295.      * @param value 
296.      *            值集合 
297.      */  
298.     public void in(String propertyName, Collection value) {  
299.         if ((value == null) || (value.size() == 0)) {  
300.             return;  
301.         }  
302.         Iterator iterator = value.iterator();  
303.         In in = criteriaBuilder.in(from.get(propertyName));  
304.         while (iterator.hasNext()) {  
305.             in.value(iterator.next());  
306.         }  
307.         this.predicates.add(in);  
308.     }  
309.   
310.     /** 直接添加JPA内部的查询条件,用于应付一些复杂查询的情况,例如或 */  
311.     public void addCriterions(Predicate predicate) {  
312.         this.predicates.add(predicate);  
313.     }  
314.   
315.     /** 
316.      * 创建查询条件 
317.      *  
318.      * @return JPA离线查询 
319.      */  
320.     public CriteriaQuery newCriteriaQuery() {  
321.         criteriaQuery.where(predicates.toArray(new Predicate[0]));  
322.         if (!isNullOrEmpty(groupBy)) {  
323.             criteriaQuery.groupBy(from.get(groupBy));  
324.         }  
325.         if (this.orders != null) {  
326.             criteriaQuery.orderBy(orders);  
327.         }  
328.         addLinkCondition(this);  
329.         return criteriaQuery;  
330.     }  
331.   
332.     private void addLinkCondition(Query query) {  
333.   
334.         Map subQuery = query.linkQuery;  
335.         if (subQuery == null)  
336.             return;  
337.   
338.         for (Iterator queryIterator = subQuery.keySet().iterator(); queryIterator.hasNext();) {  
339.             String key = (String) queryIterator.next();  
340.             Query sub = (Query) subQuery.get(key);  
341.             from.join(key);  
342.             criteriaQuery.where(sub.predicates.toArray(new Predicate[0]));  
343.             addLinkCondition(sub);  
344.         }  
345.     }  
346.   
347.     public void addOrder(String propertyName, String order) {  
348.         if (order == null || propertyName == null)  
349.             return;  
350.   
351.         if (this.orders == null)  
352.             this.orders = new ArrayList();  
353.   
354.         if (order.equalsIgnoreCase(“asc”))  
355.             this.orders.add(criteriaBuilder.asc(from.get(propertyName)));  
356.         else if (order.equalsIgnoreCase(“desc”))  
357.             this.orders.add(criteriaBuilder.desc(from.get(propertyName)));  
358.     }  
359.   
360.     public void setOrder(String propertyName, String order) {  
361.         this.orders = null;  
362.         addOrder(propertyName, order);  
363.     }  
364.   
365.     public Class getModleClass() {  
366.         return this.clazz;  
367.     }  
368.   
369.     public String getProjection() {  
370.         return this.projection;  
371.     }  
372.   
373.     public void setProjection(String projection) {  
374.         this.projection = projection;  
375.     }  
376.   
377.     public Class getClazz() {  
378.         return this.clazz;  
379.     }  
380.   
381.     public List<Order> getOrders() {  
382.         return orders;  
383.     }  
384.   
385.     public void setOrders(List<Order> orders) {  
386.         this.orders = orders;  
387.     }  
388.   
389.     public EntityManager getEntityManager() {  
390.         return this.entityManager;  
391.     }  
392.   
393.     public void setEntityManager(EntityManager em) {  
394.         this.entityManager = em;  
395.     }  
396.   
397.     public Root getFrom() {  
398.         return from;  
399.     }  
400.   
401.     public List<Predicate> getPredicates() {  
402.         return predicates;  
403.     }  
404.   
405.     public void setPredicates(List<Predicate> predicates) {  
406.         this.predicates = predicates;  
407.     }  
408.   
409.     public CriteriaQuery getCriteriaQuery() {  
410.         return criteriaQuery;  
411.     }  
412.   
413.     public CriteriaBuilder getCriteriaBuilder() {  
414.         return criteriaBuilder;  
415.     }  
416.   
417.     public void setFetchModes(List<String> fetchField, List<String> fetchMode) {  
418.   
419.     }  
420.   
421.     public String getGroupBy() {  
422.         return groupBy;  
423.     }  
424.   
425.     public void setGroupBy(String groupBy) {  
426.         this.groupBy = groupBy;  
427.     }  
428.   
429. }  

package com.platform.framework.dao.jpa;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaBuilder.In;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Order;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

import org.apache.log4j.Logger;

/**
 * Query基类<br>
 * 
 * @describe：封装JPA CriteriaBuilder查询条件
 * @author：lry
 * @since：2014-05-23
 */
@SuppressWarnings({ "unused", "unchecked", "rawtypes", "null", "hiding" })
public class Query implements Serializable {

    private static final long serialVersionUID = 5064932771068929342L;

    private static Logger log = Logger.getLogger(Query.class);

    private EntityManager entityManager;

    /** 要查询的模型对象 */
    private Class clazz;

    /** 查询条件列表 */
    private Root from;

    private List<Predicate> predicates;

    private CriteriaQuery criteriaQuery;

    private CriteriaBuilder criteriaBuilder;

    /** 排序方式列表 */
    private List<Order> orders;

    /** 关联模式 */
    private Map<String, Query> subQuery;

    private Map<String, Query> linkQuery;

    private String projection;

    /** 或条件 */
    private List<Query> orQuery;

    private String groupBy;

    private Query() {
    }

    private Query(Class clazz, EntityManager entityManager) {
        this.clazz = clazz;
        this.entityManager = entityManager;
        this.criteriaBuilder = this.entityManager.getCriteriaBuilder();
        this.criteriaQuery = criteriaBuilder.createQuery(this.clazz);
        this.from = criteriaQuery.from(this.clazz);
        this.predicates = new ArrayList();
        this.orders = new ArrayList();
    }

    /** 通过类创建查询条件 */
    public static Query forClass(Class clazz, EntityManager entityManager) {
        return new Query(clazz, entityManager);
    }

    /** 增加子查询 */
    private void addSubQuery(String propertyName, Query query) {
        if (this.subQuery == null)
            this.subQuery = new HashMap();

        if (query.projection == null)
            throw new RuntimeException("子查询字段未设置");

        this.subQuery.put(propertyName, query);
    }

    private void addSubQuery(Query query) {
        addSubQuery(query.projection, query);
    }

    /** 增关联查询 */
    public void addLinkQuery(String propertyName, Query query) {
        if (this.linkQuery == null)
            this.linkQuery = new HashMap();

        this.linkQuery.put(propertyName, query);
    }

    /** 相等 */
    public void eq(String propertyName, Object value) {
        if (isNullOrEmpty(value))
            return;
        this.predicates.add(criteriaBuilder.equal(from.get(propertyName), value));
    }

    private boolean isNullOrEmpty(Object value) {
        if (value instanceof String) {
            return value == null || "".equals(value);
        }
        return value == null;
    }

    public void or(List<String> propertyName, Object value) {
        if (isNullOrEmpty(value))
            return;
        if ((propertyName == null) || (propertyName.size() == 0))
            return;
        Predicate predicate = criteriaBuilder.or(criteriaBuilder.equal(from.get(propertyName.get(0)), value));
        for (int i = 1; i < propertyName.size(); ++i)
            predicate = criteriaBuilder.or(predicate, criteriaBuilder.equal(from.get(propertyName.get(i)), value));
        this.predicates.add(predicate);
    }

    public void orLike(List<String> propertyName, String value) {
        if (isNullOrEmpty(value) || (propertyName.size() == 0))
            return;
        if (value.indexOf("%") < 0)
            value = "%" + value + "%";
        Predicate predicate = criteriaBuilder.or(criteriaBuilder.like(from.get(propertyName.get(0)), value.toString()));
        for (int i = 1; i < propertyName.size(); ++i)
            predicate = criteriaBuilder.or(predicate, criteriaBuilder.like(from.get(propertyName.get(i)), value));
        this.predicates.add(predicate);
    }

    /** 空 */
    public void isNull(String propertyName) {
        this.predicates.add(criteriaBuilder.isNull(from.get(propertyName)));
    }

    /** 非空 */
    public void isNotNull(String propertyName) {
        this.predicates.add(criteriaBuilder.isNotNull(from.get(propertyName)));
    }

    /** 不相等 */
    public void notEq(String propertyName, Object value) {
        if (isNullOrEmpty(value)) {
            return;
        }
        this.predicates.add(criteriaBuilder.notEqual(from.get(propertyName), value));
    }

    /**
     * not in
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            值集合
     */
    public void notIn(String propertyName, Collection value) {
        if ((value == null) || (value.size() == 0)) {
            return;
        }
        Iterator iterator = value.iterator();
        In in = criteriaBuilder.in(from.get(propertyName));
        while (iterator.hasNext()) {
            in.value(iterator.next());
        }
        this.predicates.add(criteriaBuilder.not(in));
    }

    /**
     * 模糊匹配
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            属性值
     */
    public void like(String propertyName, String value) {
        if (isNullOrEmpty(value))
            return;
        if (value.indexOf("%") < 0)
            value = "%" + value + "%";
        this.predicates.add(criteriaBuilder.like(from.get(propertyName), value));
    }

    /**
     * 时间区间查询
     * 
     * @param propertyName
     *            属性名称
     * @param lo
     *            属性起始值
     * @param go
     *            属性结束值
     */
    public void between(String propertyName, Date lo, Date go) {
        if (!isNullOrEmpty(lo) && !isNullOrEmpty(go)) {
            this.predicates.add(criteriaBuilder.between(from.get(propertyName), lo, go));
        }

        // if (!isNullOrEmpty(lo) && !isNullOrEmpty(go)) {
        // this.predicates.add(criteriaBuilder.lessThan(from.get(propertyName),
        // new DateTime(lo).toString()));
        // }
        // if (!isNullOrEmpty(go)) {
        // this.predicates.add(criteriaBuilder.greaterThan(from.get(propertyName),
        // new DateTime(go).toString()));
        // }

    }

    public void between(String propertyName, Number lo, Number go) {
        if (!(isNullOrEmpty(lo)))
            ge(propertyName, lo);

        if (!(isNullOrEmpty(go)))
            le(propertyName, go);
    }

    /**
     * 小于等于
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            属性值
     */
    public void le(String propertyName, Number value) {
        if (isNullOrEmpty(value)) {
            return;
        }
        this.predicates.add(criteriaBuilder.le(from.get(propertyName), value));
    }

    /**
     * 小于
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            属性值
     */
    public void lt(String propertyName, Number value) {
        if (isNullOrEmpty(value)) {
            return;
        }
        this.predicates.add(criteriaBuilder.lt(from.get(propertyName), value));
    }

    /**
     * 大于等于
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            属性值
     */
    public void ge(String propertyName, Number value) {
        if (isNullOrEmpty(value)) {
            return;
        }
        this.predicates.add(criteriaBuilder.ge(from.get(propertyName), value));
    }

    /**
     * 大于
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            属性值
     */
    public void gt(String propertyName, Number value) {
        if (isNullOrEmpty(value)) {
            return;
        }
        this.predicates.add(criteriaBuilder.gt(from.get(propertyName), value));
    }

    /**
     * in
     * 
     * @param propertyName
     *            属性名称
     * @param value
     *            值集合
     */
    public void in(String propertyName, Collection value) {
        if ((value == null) || (value.size() == 0)) {
            return;
        }
        Iterator iterator = value.iterator();
        In in = criteriaBuilder.in(from.get(propertyName));
        while (iterator.hasNext()) {
            in.value(iterator.next());
        }
        this.predicates.add(in);
    }

    /** 直接添加JPA内部的查询条件,用于应付一些复杂查询的情况,例如或 */
    public void addCriterions(Predicate predicate) {
        this.predicates.add(predicate);
    }

    /**
     * 创建查询条件
     * 
     * @return JPA离线查询
     */
    public CriteriaQuery newCriteriaQuery() {
        criteriaQuery.where(predicates.toArray(new Predicate[0]));
        if (!isNullOrEmpty(groupBy)) {
            criteriaQuery.groupBy(from.get(groupBy));
        }
        if (this.orders != null) {
            criteriaQuery.orderBy(orders);
        }
        addLinkCondition(this);
        return criteriaQuery;
    }

    private void addLinkCondition(Query query) {

        Map subQuery = query.linkQuery;
        if (subQuery == null)
            return;

        for (Iterator queryIterator = subQuery.keySet().iterator(); queryIterator.hasNext();) {
            String key = (String) queryIterator.next();
            Query sub = (Query) subQuery.get(key);
            from.join(key);
            criteriaQuery.where(sub.predicates.toArray(new Predicate[0]));
            addLinkCondition(sub);
        }
    }

    public void addOrder(String propertyName, String order) {
        if (order == null || propertyName == null)
            return;

        if (this.orders == null)
            this.orders = new ArrayList();

        if (order.equalsIgnoreCase("asc"))
            this.orders.add(criteriaBuilder.asc(from.get(propertyName)));
        else if (order.equalsIgnoreCase("desc"))
            this.orders.add(criteriaBuilder.desc(from.get(propertyName)));
    }

    public void setOrder(String propertyName, String order) {
        this.orders = null;
        addOrder(propertyName, order);
    }

    public Class getModleClass() {
        return this.clazz;
    }

    public String getProjection() {
        return this.projection;
    }

    public void setProjection(String projection) {
        this.projection = projection;
    }

    public Class getClazz() {
        return this.clazz;
    }

    public List<Order> getOrders() {
        return orders;
    }

    public void setOrders(List<Order> orders) {
        this.orders = orders;
    }

    public EntityManager getEntityManager() {
        return this.entityManager;
    }

    public void setEntityManager(EntityManager em) {
        this.entityManager = em;
    }

    public Root getFrom() {
        return from;
    }

    public List<Predicate> getPredicates() {
        return predicates;
    }

    public void setPredicates(List<Predicate> predicates) {
        this.predicates = predicates;
    }

    public CriteriaQuery getCriteriaQuery() {
        return criteriaQuery;
    }

    public CriteriaBuilder getCriteriaBuilder() {
        return criteriaBuilder;
    }

    public void setFetchModes(List<String> fetchField, List<String> fetchMode) {

    }

    public String getGroupBy() {
        return groupBy;
    }

    public void setGroupBy(String groupBy) {
        this.groupBy = groupBy;
    }

}

 

[java] view plain copy

print ?

1. <?xml version=“1.0” encoding=“UTF-8”?>  
2. <beans xmlns=”http://www.springframework.org/schema/beans”  
3.     xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns:p=“http://www.springframework.org/schema/p”  
4.     xmlns:tx=”http://www.springframework.org/schema/tx” xmlns:context=“http://www.springframework.org/schema/context”  
5.     xmlns:util=”http://www.springframework.org/schema/util”  
6.     xmlns:aop=”http://www.springframework.org/schema/aop”  
7.     xsi:schemaLocation=”  
8.             http://www.springframework.org/schema/beans   
9.             http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
10.             http://www.springframework.org/schema/tx   
11.             http://www.springframework.org/schema/tx/spring-tx-3.1.xsd  
12.             http://www.springframework.org/schema/context  
13.             http://www.springframework.org/schema/context/spring-context-3.1.xsd  
14.             http://www.springframework.org/schema/aop   
15.             http://www.springframework.org/schema/aop/spring-aop.xsd  
16.             http://www.springframework.org/schema/util   
17.             http://www.springframework.org/schema/util/spring-util-3.1.xsd”>   
18.   
19.     <!– JPA Entity Manager Factory –>  
20.     <bean id=”entityManagerFactory”  
21.         class=“org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean”  
22.         p:packagesToScan=”com.**.model” p:dataSource-ref=“dataSource”  
23.         p:jpaVendorAdapter-ref=”hibernateVendor” p:jpaPropertyMap-ref=“jpaPropertyMap”/>  
24.   
25.     <util:map id=”jpaPropertyMap”>  
26.         <entry key=”hibernate.hbm2ddl.auto” value=“update” /><!– create,update,none –>  
27.         <entry key=”hibernate.format_sql” value=“false” />  
28.         <entry key=”hibernate.show_sql” value=“false” />  
29.         <entry key=”hibernate.current_session_context_class” value=“org.hibernate.context.internal.ThreadLocalSessionContext”/>  
30.         <entry key=”hibernate.dialect” value=“org.hibernate.dialect.MySQLDialect” />  
31.   
32.         <!– To enable Hibernate’s second level cache and query cache settings –>  
33.         <entry key=”hibernate.max_fetch_depth” value=“4” />  
34.         <entry key=”hibernate.cache.use_second_level_cache” value=“true” />  
35.         <entry key=”hibernate.cache.use_query_cache” value=“true” />  
36.         <!– <entry key=”hibernate.cache.region.factory_class” value=“org.hibernate.cache.ehcache.EhCacheRegionFactory” /> –>  
37.         <entry key=”hibernate.cache.region.factory_class” value=“org.hibernate.cache.SingletonEhCacheRegionFactory” />  
38.     </util:map>  
39.   
40.     <bean id=”hibernateVendor”  
41.         class=“org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter”  
42.         p:database=”MYSQL” p:showSql=“true” p:generateDdl=“true”  
43.         p:databasePlatform=”org.hibernate.dialect.MySQLDialect” />  
44.           
45.     <bean id=”transactionHandler” class=“com.platform.framework.dao.jpa.TransactionHandler” >  
46.         <property name=”txmethod”>  
47.             <list>  
48.                 <value>insert</value>  
49.                 <value>update</value>  
50.                 <value>delete</value>  
51.             </list>  
52.         </property>  
53.         <property name=”entityManagerFactory” ref=“entityManagerFactory”/>  
54.     </bean>  
55.     <aop:config>  
56.         <aop:aspect id=”tran” ref=“transactionHandler”>  
57.             <aop:pointcut  id=”tranMethod”  
58.                 expression=”  
59.                     execution(* com.*.dao.*.*(..))||  
60.                     execution(* com.*.service.impl.*.*(..))||  
61.                       
62.                     execution(* com.*.*.dao.*.*(..))||  
63.                     execution(* com.*.*.service.impl.*.*(..))||  
64.                       
65.                     execution(* com.*.*.*.dao.*.*(..))||  
66.                     execution(* com.*.*.*.service.impl.*.*(..))||  
67.                       
68.                     execution(* com.*.*.*.*.dao.*.*(..))||  
69.                     execution(* com.*.*.*.*.service.impl.*.*(..))||  
70.                       
71.                     execution(* com.*.*.*.*.*.dao.*.*(..))||  
72.                     execution(* com.*.*.*.*.*.service.impl.*.*(..))||  
73.                       
74.                     execution(* com.*.*.*.*.*.*.dao.*.*(..))||  
75.                     execution(* com.*.*.*.*.*.*.service.impl.*.*(..))||  
76.                       
77.                     execution(* com.platform.framework.dao.jpa.BaseDaoImpl.*(..))”/>  
78.             <aop:around method=”exec”  pointcut-ref=“tranMethod” />  
79.         </aop:aspect>  
80.     </aop:config>  
81.       
82.     <bean id=”baseDao” class=“com.platform.framework.dao.jpa.BaseDaoImpl”>  
83.         <property name=”emf” ref=“entityManagerFactory”/>  
84.     </bean>  
85. </beans>  

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
            http://www.springframework.org/schema/beans 
            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
            http://www.springframework.org/schema/tx 
            http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.1.xsd
            http://www.springframework.org/schema/aop 
            http://www.springframework.org/schema/aop/spring-aop.xsd
            http://www.springframework.org/schema/util 
            http://www.springframework.org/schema/util/spring-util-3.1.xsd"> 

    <!-- JPA Entity Manager Factory -->
    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
        p:packagesToScan="com.**.model" p:dataSource-ref="dataSource"
        p:jpaVendorAdapter-ref="hibernateVendor" p:jpaPropertyMap-ref="jpaPropertyMap"/>

    <util:map id="jpaPropertyMap">
        <entry key="hibernate.hbm2ddl.auto" value="update" /><!-- create,update,none -->
        <entry key="hibernate.format_sql" value="false" />
        <entry key="hibernate.show_sql" value="false" />
        <entry key="hibernate.current_session_context_class" value="org.hibernate.context.internal.ThreadLocalSessionContext"/>
        <entry key="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />

        <!-- To enable Hibernate's second level cache and query cache settings -->
        <entry key="hibernate.max_fetch_depth" value="4" />
        <entry key="hibernate.cache.use_second_level_cache" value="true" />
        <entry key="hibernate.cache.use_query_cache" value="true" />
        <!-- <entry key="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.EhCacheRegionFactory" /> -->
        <entry key="hibernate.cache.region.factory_class" value="org.hibernate.cache.SingletonEhCacheRegionFactory" />
    </util:map>

    <bean id="hibernateVendor"
        class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"
        p:database="MYSQL" p:showSql="true" p:generateDdl="true"
        p:databasePlatform="org.hibernate.dialect.MySQLDialect" />

    <bean id="transactionHandler" class="com.platform.framework.dao.jpa.TransactionHandler" >
        <property name="txmethod">
            <list>
                <value>insert</value>
                <value>update</value>
                <value>delete</value>
            </list>
        </property>
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>
    <aop:config>
        <aop:aspect id="tran" ref="transactionHandler">
            <aop:pointcut  id="tranMethod"
                expression="
                    execution(* com.*.dao.*.*(..))||
                    execution(* com.*.service.impl.*.*(..))||

                    execution(* com.*.*.dao.*.*(..))||
                    execution(* com.*.*.service.impl.*.*(..))||

                    execution(* com.*.*.*.dao.*.*(..))||
                    execution(* com.*.*.*.service.impl.*.*(..))||

                    execution(* com.*.*.*.*.dao.*.*(..))||
                    execution(* com.*.*.*.*.service.impl.*.*(..))||

                    execution(* com.*.*.*.*.*.dao.*.*(..))||
                    execution(* com.*.*.*.*.*.service.impl.*.*(..))||

                    execution(* com.*.*.*.*.*.*.dao.*.*(..))||
                    execution(* com.*.*.*.*.*.*.service.impl.*.*(..))||

                    execution(* com.platform.framework.dao.jpa.BaseDaoImpl.*(..))"/>
            <aop:around method="exec"  pointcut-ref="tranMethod" />
        </aop:aspect>
    </aop:config>

    <bean id="baseDao" class="com.platform.framework.dao.jpa.BaseDaoImpl">
        <property name="emf" ref="entityManagerFactory"/>
    </bean>
</beans>

 

[java] view plain copy

print ?

1. package com.platform.framework.dao.jpa;  
2.   
3. import javax.persistence.EntityManager;  
4. import javax.persistence.EntityManagerFactory;  
5. import javax.persistence.EntityTransaction;  
6.   
7. import org.apache.log4j.Logger;  
8. import org.aspectj.lang.ProceedingJoinPoint;  
9. import org.aspectj.lang.Signature;  
10.   
11. /** 
12.  * @describe JPA事务管理 
13.  * @author lry 
14.  * @since：2014-05-23 
15.  *  
16.  */  
17. public class TransactionHandler {  
18.   
19.     private static final Logger log = Logger  
20.             .getLogger(TransactionHandler.class);  
21.   
22.     private String[] txmethod;// 配置事务的传播特性方法  
23.   
24.     private EntityManagerFactory entityManagerFactory;// JPA工厂  
25.   
26.     public Object exec(ProceedingJoinPoint point) throws Throwable {  
27.   
28.         Signature signature = point.getSignature();  
29.          log.debug(point.getTarget().getClass().getName() + ”.”  
30.          + signature.getName() + ”()”);  
31.         Boolean isTransaction = false;  
32.         for (String method : txmethod) {  
33.             if (signature.getName().startsWith(method)) {// 以method开头的方法打开事务  
34.                 isTransaction = true;  
35.                 break;  
36.             }  
37.         }  
38.   
39.         // JPA->Hibernate  
40.         if (point.getTarget() instanceof EntityManagerFactoryProxy) {  
41.   
42.             // 获得被代理对象  
43.             EntityManagerFactoryProxy emfp = (EntityManagerFactoryProxy) point  
44.                     .getTarget();  
45.             EntityManager em = emfp.getEntityManager();  
46.             if (em != null) {// 如果对象已经有em了就不管  
47.                 return point.proceed();  
48.             } else {  
49.                 em = entityManagerFactory.createEntityManager();  
50.             }  
51.              log.debug(”JPA->Hibernate open connection…”);  
52.             if (isTransaction) {  
53.                 EntityTransaction t = null;  
54.                 try {  
55.   
56.                     // 打开连接并开启事务  
57.                      log.debug(”JPA->Hibernate begin transaction…”);  
58.                     t = em.getTransaction();  
59.                     if (!t.isActive())  
60.                         t.begin();  
61.                     emfp.setEntityManager(em);  
62.                     Object obj = point.proceed();  
63.   
64.                     // 提交事务  
65.                     log.debug(”JPA->Hibernate commit…”);  
66.                     t.commit();  
67.                     return obj;  
68.                 } catch (Exception e) {  
69.                     if (t != null) {  
70.                         log.debug(”JPA->Hibernate error…,rollback…”  
71.                                 + e.getMessage());  
72.                         t.rollback();  
73.                     }  
74.                     e.printStackTrace();  
75.                     throw e;  
76.                 } finally {  
77.                     if (em != null && em.isOpen()) {// 关闭连接  
78.                         em.close();  
79.                         log.debug(”JPA->Hibernate close connection…”);  
80.                     }  
81.                     emfp.setEntityManager(null);  
82.                 }  
83.             } else {  
84.                 try {  
85.                     emfp.setEntityManager(em);  
86.                     return point.proceed();  
87.                 } catch (Exception e) {  
88.                     log.debug(”JPA->Hibernate error…” + e.getMessage());  
89.                     e.printStackTrace();  
90.                     throw e;  
91.                 } finally {  
92.                     if (em != null && em.isOpen()) {// 关闭连接  
93.                         em.close();  
94.                         log.debug(”JPA->Hibernate close connection…”);  
95.                     }  
96.                     emfp.setEntityManager(null);  
97.                 }  
98.             }  
99.         } else {  
100.             return point.proceed();  
101.         }  
102.     }  
103.   
104.     public String[] getTxmethod() {  
105.         return txmethod;  
106.     }  
107.   
108.     public void setTxmethod(String[] txmethod) {  
109.         this.txmethod = txmethod;  
110.     }  
111.   
112.     public void setEntityManagerFactory(  
113.             EntityManagerFactory entityManagerFactory) {  
114.         this.entityManagerFactory = entityManagerFactory;  
115.     }  
116.   
117. }  

package com.platform.framework.dao.jpa;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;

import org.apache.log4j.Logger;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;

/**
 * @describe JPA事务管理
 * @author lry
 * @since：2014-05-23
 * 
 */
public class TransactionHandler {

    private static final Logger log = Logger
            .getLogger(TransactionHandler.class);

    private String[] txmethod;// 配置事务的传播特性方法

    private EntityManagerFactory entityManagerFactory;// JPA工厂

    public Object exec(ProceedingJoinPoint point) throws Throwable {

        Signature signature = point.getSignature();
         log.debug(point.getTarget().getClass().getName() + "."
         + signature.getName() + "()");
        Boolean isTransaction = false;
        for (String method : txmethod) {
            if (signature.getName().startsWith(method)) {// 以method开头的方法打开事务
                isTransaction = true;
                break;
            }
        }

        // JPA->Hibernate
        if (point.getTarget() instanceof EntityManagerFactoryProxy) {

            // 获得被代理对象
            EntityManagerFactoryProxy emfp = (EntityManagerFactoryProxy) point
                    .getTarget();
            EntityManager em = emfp.getEntityManager();
            if (em != null) {// 如果对象已经有em了就不管
                return point.proceed();
            } else {
                em = entityManagerFactory.createEntityManager();
            }
             log.debug("JPA->Hibernate open connection...");
            if (isTransaction) {
                EntityTransaction t = null;
                try {

                    // 打开连接并开启事务
                     log.debug("JPA->Hibernate begin transaction...");
                    t = em.getTransaction();
                    if (!t.isActive())
                        t.begin();
                    emfp.setEntityManager(em);
                    Object obj = point.proceed();

                    // 提交事务
                    log.debug("JPA->Hibernate commit...");
                    t.commit();
                    return obj;
                } catch (Exception e) {
                    if (t != null) {
                        log.debug("JPA->Hibernate error...,rollback..."
                                + e.getMessage());
                        t.rollback();
                    }
                    e.printStackTrace();
                    throw e;
                } finally {
                    if (em != null && em.isOpen()) {// 关闭连接
                        em.close();
                        log.debug("JPA->Hibernate close connection...");
                    }
                    emfp.setEntityManager(null);
                }
            } else {
                try {
                    emfp.setEntityManager(em);
                    return point.proceed();
                } catch (Exception e) {
                    log.debug("JPA->Hibernate error..." + e.getMessage());
                    e.printStackTrace();
                    throw e;
                } finally {
                    if (em != null && em.isOpen()) {// 关闭连接
                        em.close();
                        log.debug("JPA->Hibernate close connection...");
                    }
                    emfp.setEntityManager(null);
                }
            }
        } else {
            return point.proceed();
        }
    }

    public String[] getTxmethod() {
        return txmethod;
    }

    public void setTxmethod(String[] txmethod) {
        this.txmethod = txmethod;
    }

    public void setEntityManagerFactory(
            EntityManagerFactory entityManagerFactory) {
        this.entityManagerFactory = entityManagerFactory;
    }

}

 

EntityManager管理器，通过spring管理

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1. package com.platform.framework.dao.jpa;  
2.   
3. import java.util.Collection;  
4.   
5. import javax.persistence.EntityManager;  
6. import javax.persistence.EntityManagerFactory;  
7.   
8. /** 
9.  * EntityManager管理器 
10.  *  
11.  * @author：yangjian1004 
12.  * @since：2011-11-30 16:14:24 AM 
13.  */  
14. public class EntityManagerFactoryProxy {  
15.   
16.     private static ThreadLocal<EntityManager> emThreadLocal = new ThreadLocal<EntityManager>();  
17.     private static EntityManagerFactory emf;  
18.   
19.     public void setEmf(EntityManagerFactory emf) {  
20.         EntityManagerFactoryProxy.emf = emf;  
21.     }  
22.   
23.     public static EntityManagerFactory getEmf() {  
24.         return emf;  
25.     }  
26.   
27.     public EntityManager getEntityManager() {  
28.         return emThreadLocal.get();  
29.     }  
30.   
31.     public void setEntityManager(EntityManager em) {  
32.         emThreadLocal.set(em);  
33.     }  
34.   
35.     /** 
36.      * 创建查询条件 
37.      *  
38.      * @param name 
39.      *            字段名称 
40.      * @param values 
41.      *            字段值 
42.      */  
43.     public String createInCondition(String name, Collection<String> values) {  
44.         if (values == null || values.size() == 0) {  
45.             return “1<>1”;  
46.         }  
47.         StringBuffer sb = new StringBuffer();  
48.         sb.append(name + ” in(“);  
49.         for (String id : values) {  
50.             sb.append(”’” + id + “’,”);  
51.         }  
52.         String hsqlCondition = sb.substring(0, sb.length() - 1) + “)”;  
53.         return hsqlCondition;  
54.     }  
55. }  

package com.platform.framework.dao.jpa;

import java.util.Collection;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;

/**
 * EntityManager管理器
 * 
 * @author：yangjian1004
 * @since：2011-11-30 16:14:24 AM
 */
public class EntityManagerFactoryProxy {

    private static ThreadLocal<EntityManager> emThreadLocal = new ThreadLocal<EntityManager>();
    private static EntityManagerFactory emf;

    public void setEmf(EntityManagerFactory emf) {
        EntityManagerFactoryProxy.emf = emf;
    }

    public static EntityManagerFactory getEmf() {
        return emf;
    }

    public EntityManager getEntityManager() {
        return emThreadLocal.get();
    }

    public void setEntityManager(EntityManager em) {
        emThreadLocal.set(em);
    }

    /**
     * 创建查询条件
     * 
     * @param name
     *            字段名称
     * @param values
     *            字段值
     */
    public String createInCondition(String name, Collection<String> values) {
        if (values == null || values.size() == 0) {
            return "1<>1";
        }
        StringBuffer sb = new StringBuffer();
        sb.append(name + " in(");
        for (String id : values) {
            sb.append("'" + id + "',");
        }
        String hsqlCondition = sb.substring(0, sb.length() - 1) + ")";
        return hsqlCondition;
    }
}

 

Page分页和结果封装类

[java] view plain copy

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1. package com.platform.framework.dao.jpa;  
2.   
3. import java.io.Serializable;  
4. import java.util.ArrayList;  
5. import java.util.List;  
6.   
7. /** 
8.  * Page基类<br> 
9.  *  
10.  * @describe：分页 
11.  */  
12. public class Page<T> implements Serializable {  
13.   
14.     private static final long serialVersionUID = 665620345605746930L;  
15.     /** 总条数 */  
16.     private int count;  
17.     /** 页码 */  
18.     private int pageNo;  
19.     /** 每页显示多少条 */  
20.     private int rowsPerPage;  
21.     /** 总页数 */  
22.     private int totalPageCount;  
23.     /** 起始条数 */  
24.     private int firstRow;  
25.     /** 结束条数 */  
26.     private int lastRow;  
27.     /** 查询结果集合形式的结果 */  
28.     private List<T> result;  
29.     /** 查询结果对象形式的结果 */  
30.     public Object obj;  
31.   
32.     public Integer code; // 返回码  
33.     private boolean success = true;  
34.     private String message;  
35.   
36.     public Page() {  
37.     }  
38.   
39.     public Page(List<T> list) {  
40.         this(list.size(), 1, list.size(), list);  
41.     }  
42.   
43.     public Page(int count, int pageNo, int rowsPerPage, List<T> result) {  
44.         if (rowsPerPage < 1) {  
45.             rowsPerPage = 1;  
46.         }  
47.         this.count = count;  
48.         this.pageNo = pageNo;  
49.         this.result = result;  
50.         this.rowsPerPage = rowsPerPage;  
51.         if (this.result == null)  
52.             this.result = new ArrayList<T>();  
53.         totalPageCount = count / rowsPerPage;  
54.         if (count - (count / rowsPerPage) * rowsPerPage > 0)  
55.             totalPageCount++;  
56.         if (count == 0) {  
57.             totalPageCount = 0;  
58.             pageNo = 0;  
59.         }  
60.   
61.         firstRow = (pageNo - 1) * rowsPerPage + 1;  
62.         if (count == 0) {  
63.             firstRow = 0;  
64.         }  
65.         lastRow = (pageNo) * rowsPerPage;  
66.         if (lastRow > count) {  
67.             lastRow = count;  
68.         }  
69.     }  
70.   
71.     /** 返回每页的条数 */  
72.     public int getCount() {  
73.         return count;  
74.     }  
75.   
76.     public List<T> getResult() {  
77.         return result;  
78.     }  
79.   
80.     public int getPageNo() {  
81.         return pageNo;  
82.     }  
83.   
84.     /** 返回每页的条数 */  
85.     public int getRowsPerPage() {  
86.         return rowsPerPage;  
87.     }  
88.   
89.     /** 返回总的页数 */  
90.     public int getTotalPageCount() {  
91.         return totalPageCount;  
92.     }  
93.   
94.     public void setPageNo(int pageNo) {  
95.         this.pageNo = pageNo;  
96.     }  
97.   
98.     public void setRowsPerPage(int rowsPerPage) {  
99.         this.rowsPerPage = rowsPerPage;  
100.     }  
101.   
102.     public int getFirstRow() {  
103.         return firstRow;  
104.     }  
105.   
106.     public int getLastRow() {  
107.         return lastRow;  
108.     }  
109.   
110.     public void setFirstRow(int firstRow) {  
111.         this.firstRow = firstRow;  
112.     }  
113.   
114.     public void setLastRow(int lastRow) {  
115.         this.lastRow = lastRow;  
116.     }  
117.   
118.     public void setCount(int count) {  
119.         this.count = count;  
120.     }  
121.   
122.     public void setTotalPageCount(int totalPageCount) {  
123.         this.totalPageCount = totalPageCount;  
124.     }  
125.   
126.     public void setResult(List<T> result) {  
127.         this.result = result;  
128.     }  
129.   
130.     public Object getObj() {  
131.         return obj;  
132.     }  
133.   
134.     public void setObj(Object obj) {  
135.         this.obj = obj;  
136.     }  
137.   
138.     public boolean isSuccess() {  
139.         return success;  
140.     }  
141.   
142.     public void setSuccess(boolean success) {  
143.         this.success = success;  
144.     }  
145.   
146.     public String getMessage() {  
147.         return message;  
148.     }  
149.   
150.     public void setMessage(String message) {  
151.         this.message = message;  
152.     }  
153.   
154.     /** 
155.      * 计算起始条数 
156.      */  
157.     public static int calc(int pageNo, int rowsPerPage, int count) {  
158.         if (pageNo <= 0)  
159.             pageNo = 1;  
160.         if (rowsPerPage <= 0)  
161.             rowsPerPage = 10;  
162.   
163.         // 当把最后一页数据删除以后,页码会停留在最后一个上必须减一  
164.         int totalPageCount = count / rowsPerPage;  
165.         if (pageNo > totalPageCount && (count % rowsPerPage == 0)) {  
166.             pageNo = totalPageCount;  
167.         }  
168.         if (pageNo - totalPageCount > 2) {  
169.             pageNo = totalPageCount + 1;  
170.         }  
171.         int firstRow = (pageNo - 1) * rowsPerPage;  
172.         if (firstRow < 0) {  
173.             firstRow = 0;  
174.         }  
175.         return firstRow;  
176.     }  
177.   
178. }  

package com.platform.framework.dao.jpa;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**
 * Page基类<br>
 * 
 * @describe：分页
 */
public class Page<T> implements Serializable {

    private static final long serialVersionUID = 665620345605746930L;
    /** 总条数 */
    private int count;
    /** 页码 */
    private int pageNo;
    /** 每页显示多少条 */
    private int rowsPerPage;
    /** 总页数 */
    private int totalPageCount;
    /** 起始条数 */
    private int firstRow;
    /** 结束条数 */
    private int lastRow;
    /** 查询结果集合形式的结果 */
    private List<T> result;
    /** 查询结果对象形式的结果 */
    public Object obj;

    public Integer code; // 返回码
    private boolean success = true;
    private String message;

    public Page() {
    }

    public Page(List<T> list) {
        this(list.size(), 1, list.size(), list);
    }

    public Page(int count, int pageNo, int rowsPerPage, List<T> result) {
        if (rowsPerPage < 1) {
            rowsPerPage = 1;
        }
        this.count = count;
        this.pageNo = pageNo;
        this.result = result;
        this.rowsPerPage = rowsPerPage;
        if (this.result == null)
            this.result = new ArrayList<T>();
        totalPageCount = count / rowsPerPage;
        if (count - (count / rowsPerPage) * rowsPerPage > 0)
            totalPageCount++;
        if (count == 0) {
            totalPageCount = 0;
            pageNo = 0;
        }

        firstRow = (pageNo - 1) * rowsPerPage + 1;
        if (count == 0) {
            firstRow = 0;
        }
        lastRow = (pageNo) * rowsPerPage;
        if (lastRow > count) {
            lastRow = count;
        }
    }

    /** 返回每页的条数 */
    public int getCount() {
        return count;
    }

    public List<T> getResult() {
        return result;
    }

    public int getPageNo() {
        return pageNo;
    }

    /** 返回每页的条数 */
    public int getRowsPerPage() {
        return rowsPerPage;
    }

    /** 返回总的页数 */
    public int getTotalPageCount() {
        return totalPageCount;
    }

    public void setPageNo(int pageNo) {
        this.pageNo = pageNo;
    }

    public void setRowsPerPage(int rowsPerPage) {
        this.rowsPerPage = rowsPerPage;
    }

    public int getFirstRow() {
        return firstRow;
    }

    public int getLastRow() {
        return lastRow;
    }

    public void setFirstRow(int firstRow) {
        this.firstRow = firstRow;
    }

    public void setLastRow(int lastRow) {
        this.lastRow = lastRow;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public void setTotalPageCount(int totalPageCount) {
        this.totalPageCount = totalPageCount;
    }

    public void setResult(List<T> result) {
        this.result = result;
    }

    public Object getObj() {
        return obj;
    }

    public void setObj(Object obj) {
        this.obj = obj;
    }

    public boolean isSuccess() {
        return success;
    }

    public void setSuccess(boolean success) {
        this.success = success;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    /**
     * 计算起始条数
     */
    public static int calc(int pageNo, int rowsPerPage, int count) {
        if (pageNo <= 0)
            pageNo = 1;
        if (rowsPerPage <= 0)
            rowsPerPage = 10;

        // 当把最后一页数据删除以后,页码会停留在最后一个上必须减一
        int totalPageCount = count / rowsPerPage;
        if (pageNo > totalPageCount && (count % rowsPerPage == 0)) {
            pageNo = totalPageCount;
        }
        if (pageNo - totalPageCount > 2) {
            pageNo = totalPageCount + 1;
        }
        int firstRow = (pageNo - 1) * rowsPerPage;
        if (firstRow < 0) {
            firstRow = 0;
        }
        return firstRow;
    }

}

 

IBaseDao接口实现了BaseDaoImpl

[java] view plain copy

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1. package com.platform.framework.dao.jpa;  
2.   
3. import java.io.Serializable;  
4. import java.util.List;  
5.   
6. import javax.persistence.EntityManager;  
7. import javax.persistence.criteria.CriteriaQuery;  
8. import javax.persistence.criteria.Predicate;  
9. import javax.persistence.criteria.Selection;  
10. import javax.persistence.metamodel.EntityType;  
11.   
12. import org.apache.log4j.Logger;  
13.   
14. import com.google.common.base.Strings;  
15. /** 
16.  * IBaseDao接口实现了BaseDaoImpl类<br> 
17.  */  
18. @SuppressWarnings({ “unchecked”, “rawtypes” })  
19. public class BaseDaoImpl<T> extends EntityManagerFactoryProxy implements IBaseDao {  
20.   
21.     private static Logger log = Logger.getLogger(BaseDaoImpl.class);  
22.   
23.     /** 每次批量操作数 */  
24.     private int batchSize = 50;  
25.   
26.     /** 设置每次操作数 */  
27.     public void setBatchSize(int batchSize) {  
28.         this.batchSize = batchSize;  
29.     }  
30.   
31.     public <E> E get(Class clazz, Serializable id) {  
32.         return (E) getEntityManager().find(clazz, id);  
33.     }  
34.   
35.     /** 
36.      * 插入记录 
37.      *  
38.      * @param entity 
39.      *            要插入的记录 
40.      */  
41.     public void insert(Object entity) {  
42.         if (entity instanceof List) {  
43.             insertList((List) entity);  
44.             return;  
45.         } else if (entity instanceof Object[]) {  
46.             return;  
47.         }  
48.         try {  
49.             getEntityManager().persist(entity);  
50.         } catch (Exception e) {  
51.             e.printStackTrace();  
52.         }  
53.     }  
54.   
55.     /** 
56.      * 批量增加 
57.      *  
58.      * @param list 
59.      *            要新增的数据 
60.      */  
61.     public void insertList(List list) {  
62.         EntityManager entityManager = getEntityManager();  
63.         if (list == null || list.size() == 0) {  
64.             return;  
65.         }  
66.         int i = 0;  
67.         for (Object o : list) {  
68.             insert(o);  
69.             if (i % batchSize == 0) {  
70.                 entityManager.flush();  
71.             }  
72.             i++;  
73.         }  
74.         log.debug(list.get(0).getClass() + “批量增加数据” + i + “条”);  
75.     }  
76.   
77.     /** 
78.      * 更新记录 
79.      *  
80.      * @param entity 
81.      *            要更新的记录 
82.      */  
83.     public void update(Object entity) {  
84.         if (entity instanceof List) {  
85.             this.updateList((List) entity);  
86.             return;  
87.         }  
88.         getEntityManager().merge(entity);  
89.     }  
90.   
91.     /** 更新list */  
92.     public void updateList(List list) {  
93.         for (Object entity : list) {  
94.             this.update(entity);  
95.         }  
96.     }  
97.   
98.     /** 
99.      * 删除记录 
100.      *  
101.      * @param entity 
102.      *            要删除的记录 
103.      */  
104.     public void delete(Object entity) {  
105.         if (entity instanceof List) {  
106.             List list = (List) entity;  
107.             for (Object o : list) {  
108.                 getEntityManager().remove(o);  
109.             }  
110.         } else {  
111.             getEntityManager().remove(entity);  
112.         }  
113.     }  
114.   
115.     public <E extends Serializable> List<E> query(String jpql) {  
116.         return getEntityManager().createQuery(jpql).getResultList();  
117.     }  
118.   
119.     public Integer updateJpql(String jpql) {  
120.         return getEntityManager().createQuery(jpql).executeUpdate();  
121.     }  
122.   
123.     public Integer updateSql(String sql) {  
124.         return getEntityManager().createNativeQuery(sql).executeUpdate();  
125.     }  
126.   
127.     public <E extends Serializable> List<E> queryBySql(String sql) {  
128.         return getEntityManager().createNativeQuery(sql).getResultList();  
129.     }  
130.   
131.     /** 
132.      * 查询记录 
133.      *  
134.      * @param clazz 
135.      *            要查询的实体类 
136.      * @param hqlCondition 
137.      *            查询条件 
138.      */  
139.     public <E extends Serializable> List<E> query(Class clazz, String hqlCondition) {  
140.         return getEntityManager().createQuery(“select t from ” + clazz.getName() + “ as t where ” + hqlCondition)  
141.                 .getResultList();  
142.     }  
143.   
144.     public void delete(Class entity, String jpqlCondition) {  
145.         if (Strings.isNullOrEmpty(jpqlCondition)) {  
146.             jpqlCondition = ”1=1”;  
147.         }  
148.         int no = updateJpql(“delete ” + entity.getName() + “ where ” + jpqlCondition);  
149.         log.debug(entity.getName() + ”删除” + no + “条数据”);  
150.     }  
151.   
152.     /** 
153.      * 根据ids删除数据 
154.      *  
155.      * @param entity 
156.      *            删除实体类 
157.      * @param ids 
158.      *            删除条件 
159.      */  
160.     public void delete(Class entity, List ids) {  
161.         String idName = getIdName(entity, getEntityManager());  
162.         StringBuffer sb = new StringBuffer();  
163.         sb.append(idName + ” in(“);  
164.         for (int i = 0; i < ids.size(); i++) {  
165.             sb.append(”’” + ids.get(i) + “’,”);  
166.         }  
167.         String jpqlCondition = sb.substring(0, sb.length() - 1) + “)”;  
168.         delete(entity, jpqlCondition);  
169.     }  
170.   
171.     public <E extends Serializable> List<E> query(String jpql, int firstResult, int maxResults) {  
172.         List result = getEntityManager().createQuery(jpql).setFirstResult(firstResult).setMaxResults(maxResults)  
173.                 .getResultList();  
174.         return result;  
175.     }  
176.   
177.     public <E extends Serializable> List<E> queryBySql(String sql, int firstResult, int maxResults) {  
178.         return getEntityManager().createNativeQuery(sql).setFirstResult(firstResult).setMaxResults(maxResults)  
179.                 .getResultList();  
180.     }  
181.   
182.     public <E extends Serializable> List<E> queryAll(Class clazz) {  
183.         CriteriaQuery criteriaQuery = getEntityManager().getCriteriaBuilder().createQuery(clazz);  
184.         criteriaQuery.from(clazz);  
185.         return getEntityManager().createQuery(criteriaQuery).getResultList();  
186.     }  
187.   
188.     public Page queryPageByJpql(String jpql, int pageNo, int rowsPerPage) {  
189.         if (pageNo <= 0)  
190.             pageNo = 1;  
191.         if (rowsPerPage <= 0)  
192.             rowsPerPage = 7;  
193.         log.debug(”—–开始查询,页码:” + pageNo + “,每页显示:” + rowsPerPage + “—-“);  
194.   
195.         String countJpql = ”select count(*) from (“ + jpql + “)”;  
196.         int count = getCount(countJpql).intValue();  
197.   
198.         // 当把最后一页数据删除以后,页码会停留在最后一个上必须减一  
199.         int totalPageCount = count / rowsPerPage;  
200.         if (pageNo > totalPageCount && (count % rowsPerPage == 0)) {  
201.             pageNo = totalPageCount;  
202.         }  
203.         if (pageNo - totalPageCount > 2) {  
204.             pageNo = totalPageCount + 1;  
205.         }  
206.         int firstResult = (pageNo - 1) * rowsPerPage;  
207.         if (firstResult < 0) {  
208.             firstResult = 0;  
209.         }  
210.         List result = getEntityManager().createQuery(jpql).setFirstResult(firstResult).setMaxResults(rowsPerPage)  
211.                 .getResultList();  
212.         return new Page(count, pageNo, rowsPerPage, result);  
213.     }  
214.   
215.     public Long getCount(String jpql) {  
216.         return (Long) getEntityManager().createQuery(jpql).getResultList().get(0);  
217.     }  
218.   
219.     /*** 
220.      *  
221.      * @Method updateJpql 
222.      * @Description 根据传入的带有占位符的sql语句, 做增删改操作 例如 
223.      *              updateJpql(“update user t set t.name=? where t.id=?” 
224.      *              ,{[zhongxiang],[23]}) 
225.      * @Author 钟翔/zhongxiang 
226.      * @Date 2012-8-9 下午3:38:35 
227.      * @param jpql 
228.      *            占位符式的sql 
229.      * @param paramList 
230.      *            list里面装有[zhongxiang , 23] 
231.      */  
232.     public void updateJpql(String jpql, List paramList) {  
233.         javax.persistence.Query query = getEntityManager().createQuery(jpql);  
234.         for (int i = 0; i < paramList.size(); i++) {  
235.             query.setParameter(i + 1, paramList.get(i));  
236.         }  
237.         query.executeUpdate();  
238.     }  
239.   
240.     /** 
241.      * 统计记录 
242.      *  
243.      * @param query 
244.      *            统计条件 
245.      */  
246.     public Long getCount(Query query) {  
247.         Selection selection = query.getCriteriaQuery().getSelection();  
248.         query.getCriteriaQuery().select(query.getCriteriaBuilder().count(query.getFrom()));  
249.         Long count = (Long) getEntityManager().createQuery(query.newCriteriaQuery()).getResultList().get(0);  
250.         query.getCriteriaQuery().select(selection);  
251.         return count;  
252.     }  
253.   
254.     /** 
255.      * 分页查询 
256.      *  
257.      * @param query 
258.      *            查询条件 
259.      * @param pageNo 
260.      *            页号 
261.      * @param rowsPerPage 
262.      *            每页显示条数 
263.      */  
264.     public Page queryPage(Query query, int pageNo, int rowsPerPage) {  
265.         if (pageNo <= 0)  
266.             pageNo = 1;  
267.         if (rowsPerPage <= 0)  
268.             rowsPerPage = 7;  
269.         log.debug(query.getClazz() + ”—–开始查询,页码:” + pageNo + “,每页显示:” + rowsPerPage + “—-“);  
270.         log.debug(”查询条件:”);  
271.         for (Predicate cri : query.getPredicates())  
272.             log.debug(cri);  
273.   
274.         int count = getCount(query).intValue();  
275.   
276.         // 当把最后一页数据删除以后,页码会停留在最后一个上必须减一  
277.         int totalPageCount = count / rowsPerPage;  
278.         if (pageNo > totalPageCount && (count % rowsPerPage == 0)) {  
279.             pageNo = totalPageCount;  
280.         }  
281.         if (pageNo - totalPageCount > 2) {  
282.             pageNo = totalPageCount + 1;  
283.         }  
284.         int firstResult = (pageNo - 1) * rowsPerPage;  
285.         if (firstResult < 0) {  
286.             firstResult = 0;  
287.         }  
288.         List result = getEntityManager().createQuery(query.newCriteriaQuery()).setFirstResult(firstResult)  
289.                 .setMaxResults(rowsPerPage).getResultList();  
290.         return new Page(count, pageNo, rowsPerPage, result);  
291.     }  
292.   
293.     /** 
294.      * 根据query查找记录 
295.      *  
296.      * @param query 
297.      *            查询条件 
298.      * @param firstResult 
299.      *            起始行 
300.      * @param maxResults 
301.      *            结束行 
302.      */  
303.     public <E extends Serializable> List<E> query(Query query, int firstResult, int maxResults) {  
304.         List result = getEntityManager().createQuery(query.newCriteriaQuery()).setFirstResult(firstResult)  
305.                 .setMaxResults(maxResults).getResultList();  
306.         return result;  
307.     }  
308.   
309.     /** 
310.      * 根据query查找记录 
311.      *  
312.      * @param query 
313.      *            查询条件 
314.      */  
315.     public <E extends Serializable> List<E> query(Query query) {  
316.         return getEntityManager().createQuery(query.newCriteriaQuery()).getResultList();  
317.     }  
318.       
319.     /** 
320.      * 获得主键名称 
321.      *  
322.      * @param clazz 
323.      *            操作是实体对象 
324.      * @param EntityManager 
325.      *            jpa的entityManager工厂 
326.      * @return 初建名称 
327.      * */  
328.     public static String getIdName(Class clazz, EntityManager entityManager) {  
329.         EntityType entityType = entityManager.getMetamodel().entity(clazz);  
330.         return entityType.getId(entityType.getIdType().getJavaType()).getName();  
331.     }  
332. }  

package com.platform.framework.dao.jpa;

import java.io.Serializable;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Selection;
import javax.persistence.metamodel.EntityType;

import org.apache.log4j.Logger;

import com.google.common.base.Strings;
/**
 * IBaseDao接口实现了BaseDaoImpl类<br>
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public class BaseDaoImpl<T> extends EntityManagerFactoryProxy implements IBaseDao {

    private static Logger log = Logger.getLogger(BaseDaoImpl.class);

    /** 每次批量操作数 */
    private int batchSize = 50;

    /** 设置每次操作数 */
    public void setBatchSize(int batchSize) {
        this.batchSize = batchSize;
    }

    public <E> E get(Class clazz, Serializable id) {
        return (E) getEntityManager().find(clazz, id);
    }

    /**
     * 插入记录
     * 
     * @param entity
     *            要插入的记录
     */
    public void insert(Object entity) {
        if (entity instanceof List) {
            insertList((List) entity);
            return;
        } else if (entity instanceof Object[]) {
            return;
        }
        try {
            getEntityManager().persist(entity);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 批量增加
     * 
     * @param list
     *            要新增的数据
     */
    public void insertList(List list) {
        EntityManager entityManager = getEntityManager();
        if (list == null || list.size() == 0) {
            return;
        }
        int i = 0;
        for (Object o : list) {
            insert(o);
            if (i % batchSize == 0) {
                entityManager.flush();
            }
            i++;
        }
        log.debug(list.get(0).getClass() + "批量增加数据" + i + "条");
    }

    /**
     * 更新记录
     * 
     * @param entity
     *            要更新的记录
     */
    public void update(Object entity) {
        if (entity instanceof List) {
            this.updateList((List) entity);
            return;
        }
        getEntityManager().merge(entity);
    }

    /** 更新list */
    public void updateList(List list) {
        for (Object entity : list) {
            this.update(entity);
        }
    }

    /**
     * 删除记录
     * 
     * @param entity
     *            要删除的记录
     */
    public void delete(Object entity) {
        if (entity instanceof List) {
            List list = (List) entity;
            for (Object o : list) {
                getEntityManager().remove(o);
            }
        } else {
            getEntityManager().remove(entity);
        }
    }

    public <E extends Serializable> List<E> query(String jpql) {
        return getEntityManager().createQuery(jpql).getResultList();
    }

    public Integer updateJpql(String jpql) {
        return getEntityManager().createQuery(jpql).executeUpdate();
    }

    public Integer updateSql(String sql) {
        return getEntityManager().createNativeQuery(sql).executeUpdate();
    }

    public <E extends Serializable> List<E> queryBySql(String sql) {
        return getEntityManager().createNativeQuery(sql).getResultList();
    }

    /**
     * 查询记录
     * 
     * @param clazz
     *            要查询的实体类
     * @param hqlCondition
     *            查询条件
     */
    public <E extends Serializable> List<E> query(Class clazz, String hqlCondition) {
        return getEntityManager().createQuery("select t from " + clazz.getName() + " as t where " + hqlCondition)
                .getResultList();
    }

    public void delete(Class entity, String jpqlCondition) {
        if (Strings.isNullOrEmpty(jpqlCondition)) {
            jpqlCondition = "1=1";
        }
        int no = updateJpql("delete " + entity.getName() + " where " + jpqlCondition);
        log.debug(entity.getName() + "删除" + no + "条数据");
    }

    /**
     * 根据ids删除数据
     * 
     * @param entity
     *            删除实体类
     * @param ids
     *            删除条件
     */
    public void delete(Class entity, List ids) {
        String idName = getIdName(entity, getEntityManager());
        StringBuffer sb = new StringBuffer();
        sb.append(idName + " in(");
        for (int i = 0; i < ids.size(); i++) {
            sb.append("'" + ids.get(i) + "',");
        }
        String jpqlCondition = sb.substring(0, sb.length() - 1) + ")";
        delete(entity, jpqlCondition);
    }

    public <E extends Serializable> List<E> query(String jpql, int firstResult, int maxResults) {
        List result = getEntityManager().createQuery(jpql).setFirstResult(firstResult).setMaxResults(maxResults)
                .getResultList();
        return result;
    }

    public <E extends Serializable> List<E> queryBySql(String sql, int firstResult, int maxResults) {
        return getEntityManager().createNativeQuery(sql).setFirstResult(firstResult).setMaxResults(maxResults)
                .getResultList();
    }

    public <E extends Serializable> List<E> queryAll(Class clazz) {
        CriteriaQuery criteriaQuery = getEntityManager().getCriteriaBuilder().createQuery(clazz);
        criteriaQuery.from(clazz);
        return getEntityManager().createQuery(criteriaQuery).getResultList();
    }

    public Page queryPageByJpql(String jpql, int pageNo, int rowsPerPage) {
        if (pageNo <= 0)
            pageNo = 1;
        if (rowsPerPage <= 0)
            rowsPerPage = 7;
        log.debug("-----开始查询,页码:" + pageNo + ",每页显示:" + rowsPerPage + "----");

        String countJpql = "select count(*) from (" + jpql + ")";
        int count = getCount(countJpql).intValue();

        // 当把最后一页数据删除以后,页码会停留在最后一个上必须减一
        int totalPageCount = count / rowsPerPage;
        if (pageNo > totalPageCount && (count % rowsPerPage == 0)) {
            pageNo = totalPageCount;
        }
        if (pageNo - totalPageCount > 2) {
            pageNo = totalPageCount + 1;
        }
        int firstResult = (pageNo - 1) * rowsPerPage;
        if (firstResult < 0) {
            firstResult = 0;
        }
        List result = getEntityManager().createQuery(jpql).setFirstResult(firstResult).setMaxResults(rowsPerPage)
                .getResultList();
        return new Page(count, pageNo, rowsPerPage, result);
    }

    public Long getCount(String jpql) {
        return (Long) getEntityManager().createQuery(jpql).getResultList().get(0);
    }

    /***
     * 
     * @Method updateJpql
     * @Description 根据传入的带有占位符的sql语句, 做增删改操作 例如
     *              updateJpql("update user t set t.name=? where t.id=?"
     *              ,{[zhongxiang],[23]})
     * @Author 钟翔/zhongxiang
     * @Date 2012-8-9 下午3:38:35
     * @param jpql
     *            占位符式的sql
     * @param paramList
     *            list里面装有[zhongxiang , 23]
     */
    public void updateJpql(String jpql, List paramList) {
        javax.persistence.Query query = getEntityManager().createQuery(jpql);
        for (int i = 0; i < paramList.size(); i++) {
            query.setParameter(i + 1, paramList.get(i));
        }
        query.executeUpdate();
    }

    /**
     * 统计记录
     * 
     * @param query
     *            统计条件
     */
    public Long getCount(Query query) {
        Selection selection = query.getCriteriaQuery().getSelection();
        query.getCriteriaQuery().select(query.getCriteriaBuilder().count(query.getFrom()));
        Long count = (Long) getEntityManager().createQuery(query.newCriteriaQuery()).getResultList().get(0);
        query.getCriteriaQuery().select(selection);
        return count;
    }

    /**
     * 分页查询
     * 
     * @param query
     *            查询条件
     * @param pageNo
     *            页号
     * @param rowsPerPage
     *            每页显示条数
     */
    public Page queryPage(Query query, int pageNo, int rowsPerPage) {
        if (pageNo <= 0)
            pageNo = 1;
        if (rowsPerPage <= 0)
            rowsPerPage = 7;
        log.debug(query.getClazz() + "-----开始查询,页码:" + pageNo + ",每页显示:" + rowsPerPage + "----");
        log.debug("查询条件:");
        for (Predicate cri : query.getPredicates())
            log.debug(cri);

        int count = getCount(query).intValue();

        // 当把最后一页数据删除以后,页码会停留在最后一个上必须减一
        int totalPageCount = count / rowsPerPage;
        if (pageNo > totalPageCount && (count % rowsPerPage == 0)) {
            pageNo = totalPageCount;
        }
        if (pageNo - totalPageCount > 2) {
            pageNo = totalPageCount + 1;
        }
        int firstResult = (pageNo - 1) * rowsPerPage;
        if (firstResult < 0) {
            firstResult = 0;
        }
        List result = getEntityManager().createQuery(query.newCriteriaQuery()).setFirstResult(firstResult)
                .setMaxResults(rowsPerPage).getResultList();
        return new Page(count, pageNo, rowsPerPage, result);
    }

    /**
     * 根据query查找记录
     * 
     * @param query
     *            查询条件
     * @param firstResult
     *            起始行
     * @param maxResults
     *            结束行
     */
    public <E extends Serializable> List<E> query(Query query, int firstResult, int maxResults) {
        List result = getEntityManager().createQuery(query.newCriteriaQuery()).setFirstResult(firstResult)
                .setMaxResults(maxResults).getResultList();
        return result;
    }

    /**
     * 根据query查找记录
     * 
     * @param query
     *            查询条件
     */
    public <E extends Serializable> List<E> query(Query query) {
        return getEntityManager().createQuery(query.newCriteriaQuery()).getResultList();
    }

    /**
     * 获得主键名称
     * 
     * @param clazz
     *            操作是实体对象
     * @param EntityManager
     *            jpa的entityManager工厂
     * @return 初建名称
     * */
    public static String getIdName(Class clazz, EntityManager entityManager) {
        EntityType entityType = entityManager.getMetamodel().entity(clazz);
        return entityType.getId(entityType.getIdType().getJavaType()).getName();
    }
}

 

IBaseDao接口 

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1. package com.platform.framework.dao.jpa;  
2.   
3. import java.io.Serializable;  
4. import java.util.List;  
5.   
6. import javax.persistence.EntityManager;  
7.   
8. /** 
9.  * IBaseDao基类<br> 
10.  *  
11.  * @describe：系统基础JPA Dao接口 
12.  */  
13. @SuppressWarnings({ “rawtypes” })  
14. public interface IBaseDao {  
15.       
16.     public EntityManager getEntityManager();  
17.   
18.     public <E> E get(Class clazz, Serializable id);  
19.   
20.     /** 
21.      * 插入记录 
22.      *  
23.      * @param entity 
24.      *            要插入的记录 
25.      */  
26.     public void insert(Object entity);  
27.   
28.     /** 
29.      * 更新记录 
30.      *  
31.      * @param entity 
32.      *            要更新的记录 
33.      */  
34.     public void update(Object entity);  
35.   
36.     /** 更新list */  
37.     public void updateList(List list);  
38.   
39.     /** 
40.      * 删除记录 
41.      *  
42.      * @param entity 
43.      *            要删除的记录 
44.      */  
45.     public void delete(Object entity);  
46.   
47.     /** 
48.      * 删除记录 
49.      *  
50.      * @param entity 
51.      *            要删除的记录 
52.      */  
53.     public void delete(Class entity, List ids);  
54.   
55.     /** 
56.      * 删除记录 
57.      *  
58.      * @param entity 
59.      *            要删除的记录 
60.      */  
61.     public void delete(Class entity, String jpqlCondition);  
62.   
63.     /** 
64.      * 统计记录 
65.      *  
66.      * @param query 
67.      *            统计条件 
68.      */  
69.     public Long getCount(Query query);  
70.   
71.     public Long getCount(String jpql);  
72.   
73.     /** 
74.      * 分页查询 
75.      *  
76.      * @param query 
77.      *            查询条件 
78.      * @param pageNo 
79.      *            页号 
80.      * @param rowsPerPage 
81.      *            每页显示条数 
82.      */  
83.     public Page queryPage(Query query, int pageNo, int rowsPerPage);  
84.   
85.     /** 
86.      * 根据query查找记录 
87.      *  
88.      * @param query 
89.      *            查询条件 
90.      * @param firstResult 
91.      *            起始行 
92.      * @param maxResults 
93.      *            结束行 
94.      */  
95.     public <E extends Serializable> List<E> query(Query query, int firstResult, int maxResults);  
96.   
97.     /** 
98.      * 根据query查找记录 
99.      *  
100.      * @param query 
101.      *            查询条件 
102.      */  
103.     public <E extends Serializable> List<E> query(Query query);  
104.   
105.     /** 
106.      * 执行更新操作的jpql语句 
107.      *  
108.      * @param jpql 
109.      *            要执行的jpql语句 
110.      */  
111.     public <E extends Serializable> List<E> query(String jpql);  
112.   
113.     public <E extends Serializable> List<E> queryAll(Class clazz);  
114.   
115.     public <E extends Serializable> List<E> query(String jpql, int firstResult, int maxResults);  
116.   
117.     /** 
118.      * 执行查询操作的sql语句 
119.      *  
120.      * @param sql 
121.      *            要执行的sql语句 
122.      */  
123.     public <E extends Serializable> List<E> queryBySql(String sql);  
124.   
125.     public <E extends Serializable> List<E> queryBySql(String sql, int firstResult, int maxResults);  
126.   
127.     /** 
128.      * 查询记录 
129.      *  
130.      * @param clazz 
131.      *            要查询的实体类 
132.      * @param hqlCondition 
133.      *            查询条件 
134.      */  
135.     public <E extends Serializable> List<E> query(Class clazz, String hqlCondition);  
136.   
137.     /** 
138.      * 执行更新操作的sql语句 
139.      *  
140.      * @param sql 
141.      *            要执行的sql语句 
142.      */  
143.     public Integer updateSql(String sql);  
144.   
145.     public Integer updateJpql(String jpql);  
146.   
147.     public Page queryPageByJpql(String hql, int pageNo, int rowsPerPage);  
148.   
149.     public void updateJpql(String jpql, List paramList);  
150.   
151. }  

package com.platform.framework.dao.jpa;

import java.io.Serializable;
import java.util.List;

import javax.persistence.EntityManager;

/**
 * IBaseDao基类<br>
 * 
 * @describe：系统基础JPA Dao接口
 */
@SuppressWarnings({ "rawtypes" })
public interface IBaseDao {

    public EntityManager getEntityManager();

    public <E> E get(Class clazz, Serializable id);

    /**
     * 插入记录
     * 
     * @param entity
     *            要插入的记录
     */
    public void insert(Object entity);

    /**
     * 更新记录
     * 
     * @param entity
     *            要更新的记录
     */
    public void update(Object entity);

    /** 更新list */
    public void updateList(List list);

    /**
     * 删除记录
     * 
     * @param entity
     *            要删除的记录
     */
    public void delete(Object entity);

    /**
     * 删除记录
     * 
     * @param entity
     *            要删除的记录
     */
    public void delete(Class entity, List ids);

    /**
     * 删除记录
     * 
     * @param entity
     *            要删除的记录
     */
    public void delete(Class entity, String jpqlCondition);

    /**
     * 统计记录
     * 
     * @param query
     *            统计条件
     */
    public Long getCount(Query query);

    public Long getCount(String jpql);

    /**
     * 分页查询
     * 
     * @param query
     *            查询条件
     * @param pageNo
     *            页号
     * @param rowsPerPage
     *            每页显示条数
     */
    public Page queryPage(Query query, int pageNo, int rowsPerPage);

    /**
     * 根据query查找记录
     * 
     * @param query
     *            查询条件
     * @param firstResult
     *            起始行
     * @param maxResults
     *            结束行
     */
    public <E extends Serializable> List<E> query(Query query, int firstResult, int maxResults);

    /**
     * 根据query查找记录
     * 
     * @param query
     *            查询条件
     */
    public <E extends Serializable> List<E> query(Query query);

    /**
     * 执行更新操作的jpql语句
     * 
     * @param jpql
     *            要执行的jpql语句
     */
    public <E extends Serializable> List<E> query(String jpql);

    public <E extends Serializable> List<E> queryAll(Class clazz);

    public <E extends Serializable> List<E> query(String jpql, int firstResult, int maxResults);

    /**
     * 执行查询操作的sql语句
     * 
     * @param sql
     *            要执行的sql语句
     */
    public <E extends Serializable> List<E> queryBySql(String sql);

    public <E extends Serializable> List<E> queryBySql(String sql, int firstResult, int maxResults);

    /**
     * 查询记录
     * 
     * @param clazz
     *            要查询的实体类
     * @param hqlCondition
     *            查询条件
     */
    public <E extends Serializable> List<E> query(Class clazz, String hqlCondition);

    /**
     * 执行更新操作的sql语句
     * 
     * @param sql
     *            要执行的sql语句
     */
    public Integer updateSql(String sql);

    public Integer updateJpql(String jpql);

    public Page queryPageByJpql(String hql, int pageNo, int rowsPerPage);

    public void updateJpql(String jpql, List paramList);

}