之前写过一版本的ueditor的使用方式,感觉后来ueditor升级很快,转眼间又升级了,今天有一个人问这块相关的问题,正好又熟悉下。
maven的jar包的放置位置如下:
从代码来看,rootPath其实就是项目的根路径,构建了ActionEnter,并调用了exec函数。
我们慢慢的来看这个函数:首先在构造函数里面调用了request.getContextPath()和request.getRequestURI()函数。
首先最基本的用法我就不讲了,只讲文件上传的这块。
首先,文件上传这块和之前的变化很大,先慢慢的讲讲用法。
1. java版本的在jsp目录的文件结构如下:

从这地方可以看出来,有一个controller.jsp, 一个config.json,一堆jar文件, 这个和之前版本是不一致的。
2. maven工程的jar包的引用
如果没有使用jar包,很容易,直接copy文件就可以,但是maven的方式,这个jar又在网上没有,索幸maven提供了system方式的依赖方式:
- < dependency>
- < groupId> com.baidu.ueditor </groupId >
- < artifactId> ueditor </artifactId >
- < version> 1.1.1 </version >
- < scope> system </scope >
- < systemPath> ${basedir}/ src/main/webapp /WEB-INF/lib/ ueditor-1.1.1.jar </systemPath >
- </ dependency>

其他的jar我就不多讲了,都很容易找。
3. controller.jsp文件阅读
- <%@ page language="java" contentType="text/html; charset=UTF-8"
- import="com.baidu.ueditor.ActionEnter"
- pageEncoding="UTF-8"%>
- <%@ page trimDirectiveWhitespaces="true" %>
- <%
- request.setCharacterEncoding( "utf-8" );
- response.setHeader("Content-Type" , "text/html");
- String rootPath = application.getRealPath( "/" );
- out.write( new ActionEnter( request, rootPath ).exec() );
- %>
从代码来看,rootPath其实就是项目的根路径,构建了ActionEnter,并调用了exec函数。
我们来看下ActionEnter的代码:
- package com.baidu.ueditor;
- import com.baidu.ueditor.define.ActionMap;
- import com.baidu.ueditor.define.BaseState;
- import com.baidu.ueditor.define.State;
- import com.baidu.ueditor.hunter.FileManager;
- import com.baidu.ueditor.hunter.ImageHunter;
- import com.baidu.ueditor.upload.Uploader;
- import java.util.Map;
- import javax.servlet.http.HttpServletRequest;
- import org.json.JSONObject;
- public class ActionEnter
- {
- private HttpServletRequest request = null;
- private String rootPath = null;
- private String contextPath = null;
- private String actionType = null;
- private ConfigManager configManager = null;
- public ActionEnter(HttpServletRequest request, String rootPath)
- {
- this.request = request;
- this.rootPath = rootPath;
- // 对action进行赋值。
- this.actionType = request.getParameter("action");
- this.contextPath = request.getContextPath();
- // 构建configManager类
- this.configManager = ConfigManager.getInstance(this.rootPath, this.contextPath, request.getRequestURI());
- }
- public String exec()
- {
- // 这个是处理jsonp的形式,一般都是不跨域的。
- String callbackName = this.request.getParameter("callback");
- if (callbackName != null)
- {
- if (!validCallbackName(callbackName)) {
- return new BaseState(false, 401).toJSONString();
- }
- return callbackName + "(" + invoke() + ");";
- }
- return invoke();
- }
- public String invoke()
- {
- // 判断action是否合法,如果不合法返回一个非法状态
- if ((this.actionType == null) || (!ActionMap.mapping.containsKey(this.actionType))) {
- return new BaseState(false, 101).toJSONString();
- }
- // 如果找不到configManager也报错
- if ((this.configManager == null) || (!this.configManager.valid())) {
- return new BaseState(false, 102).toJSONString();
- }
- State state = null;
- // 取得actionCode
- int actionCode = ActionMap.getType(this.actionType);
- Map conf = null;
- switch (actionCode)
- {
- case 0:
- return this.configManager.getAllConfig().toString();
- case 1:
- case 2:
- case 3:
- case 4:
- // 处理上传文件
- conf = this.configManager.getConfig(actionCode);
- state = new Uploader(this.request, conf).doExec();
- break;
- case 5:
- conf = this.configManager.getConfig(actionCode);
- String[] list = this.request.getParameterValues((String)conf.get("fieldName"));
- // 处理在线编辑
- state = new ImageHunter(conf).capture(list);
- break;
- case 6:
- case 7:
- conf = this.configManager.getConfig(actionCode);
- int start = getStartIndex();
- // 处理文件list
- state = new FileManager(conf).listFile(start);
- }
- return state.toJSONString();
- }
- public int getStartIndex()
- {
- String start = this.request.getParameter("start");
- try
- {
- return Integer.parseInt(start); } catch (Exception e) {
- }
- return 0;
- }
- public boolean validCallbackName(String name)
- {
- if (name.matches("^[a-zA-Z_]+[\\w0-9_]*$")) {
- return true;
- }
- return false;
- }
- }
假设我们的项目的contextPath为:test,那么下面两个函数的返回值则如下:
request.getContextPath /test
request.getRequestURI /test/resources/ueditor/jsp/controller.jsp
我们还是先来看下ConfigManager类吧。
- package com.baidu.ueditor;
- import java.io.BufferedReader;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileNotFoundException;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.io.UnsupportedEncodingException;
- import java.util.HashMap;
- import java.util.Map;
- import org.json.JSONArray;
- import org.json.JSONObject;
- public final class ConfigManager
- {
- private final String rootPath;
- private final String originalPath;
- private final String contextPath;
- private static final String configFileName = "config.json";
- private String parentPath = null;
- private JSONObject jsonConfig = null;
- private static final String SCRAWL_FILE_NAME = "scrawl";
- private static final String REMOTE_FILE_NAME = "remote";
- private ConfigManager(String rootPath, String contextPath, String uri)
- throws FileNotFoundException, IOException
- {
- rootPath = rootPath.replace("\\", "/");
- this.rootPath = rootPath;
- this.contextPath = contextPath;
- // 这个地方要特别注意,originalPath其实就是controller.jsp所在的路径
- if (contextPath.length() > 0)
- this.originalPath = (this.rootPath + uri.substring(contextPath.length()));
- else {
- this.originalPath = (this.rootPath + uri);
- }
- initEnv();
- }
- public static ConfigManager getInstance(String rootPath, String contextPath, String uri)
- {
- try
- {
- return new ConfigManager(rootPath, contextPath, uri); } catch (Exception e) {
- }
- return null;
- }
- public boolean valid()
- {
- return this.jsonConfig != null;
- }
- public JSONObject getAllConfig()
- {
- return this.jsonConfig;
- }
- public Map<String, Object> getConfig(int type)
- {
- Map conf = new HashMap();
- String savePath = null;
- // 根据不同的code来解析config.json的配置文件
- switch (type)
- {
- case 4:
- conf.put("isBase64", "false");
- conf.put("maxSize", Long.valueOf(this.jsonConfig.getLong("fileMaxSize")));
- conf.put("allowFiles", getArray("fileAllowFiles"));
- conf.put("fieldName", this.jsonConfig.getString("fileFieldName"));
- savePath = this.jsonConfig.getString("filePathFormat");
- break;
- case 1:
- conf.put("isBase64", "false");
- conf.put("maxSize", Long.valueOf(this.jsonConfig.getLong("imageMaxSize")));
- conf.put("allowFiles", getArray("imageAllowFiles"));
- conf.put("fieldName", this.jsonConfig.getString("imageFieldName"));
- savePath = this.jsonConfig.getString("imagePathFormat");
- break;
- case 3:
- conf.put("maxSize", Long.valueOf(this.jsonConfig.getLong("videoMaxSize")));
- conf.put("allowFiles", getArray("videoAllowFiles"));
- conf.put("fieldName", this.jsonConfig.getString("videoFieldName"));
- savePath = this.jsonConfig.getString("videoPathFormat");
- break;
- case 2:
- conf.put("filename", "scrawl");
- conf.put("maxSize", Long.valueOf(this.jsonConfig.getLong("scrawlMaxSize")));
- conf.put("fieldName", this.jsonConfig.getString("scrawlFieldName"));
- conf.put("isBase64", "true");
- savePath = this.jsonConfig.getString("scrawlPathFormat");
- break;
- case 5:
- conf.put("filename", "remote");
- conf.put("filter", getArray("catcherLocalDomain"));
- conf.put("maxSize", Long.valueOf(this.jsonConfig.getLong("catcherMaxSize")));
- conf.put("allowFiles", getArray("catcherAllowFiles"));
- conf.put("fieldName", this.jsonConfig.getString("catcherFieldName") + "[]");
- savePath = this.jsonConfig.getString("catcherPathFormat");
- break;
- case 7:
- conf.put("allowFiles", getArray("imageManagerAllowFiles"));
- conf.put("dir", this.jsonConfig.getString("imageManagerListPath"));
- conf.put("count", Integer.valueOf(this.jsonConfig.getInt("imageManagerListSize")));
- break;
- case 6:
- conf.put("allowFiles", getArray("fileManagerAllowFiles"));
- conf.put("dir", this.jsonConfig.getString("fileManagerListPath"));
- conf.put("count", Integer.valueOf(this.jsonConfig.getInt("fileManagerListSize")));
- }
- conf.put("savePath", savePath);
- conf.put("rootPath", this.rootPath);
- return conf;
- }
- // 加载config.json配置文件
- private void initEnv()
- throws FileNotFoundException, IOException
- {
- File file = new File(this.originalPath);
- if (!file.isAbsolute()) {
- file = new File(file.getAbsolutePath());
- }
- this.parentPath = file.getParent();
- String configContent = readFile(getConfigPath());
- try
- {
- JSONObject jsonConfig = new JSONObject(configContent);
- this.jsonConfig = jsonConfig;
- } catch (Exception e) {
- this.jsonConfig = null;
- }
- }
- private String getConfigPath()
- {
- return this.parentPath + File.separator + "config.json";
- }
- private String[] getArray(String key)
- {
- JSONArray jsonArray = this.jsonConfig.getJSONArray(key);
- String[] result = new String[jsonArray.length()];
- int i = 0; for (int len = jsonArray.length(); i < len; i++) {
- result[i] = jsonArray.getString(i);
- }
- return result;
- }
- // 读取config.json里面的内容
- private String readFile(String path)
- throws IOException
- {
- StringBuilder builder = new StringBuilder();
- try
- {
- InputStreamReader reader = new InputStreamReader(new FileInputStream(path), "UTF-8");
- BufferedReader bfReader = new BufferedReader(reader);
- String tmpContent = null;
- while ((tmpContent = bfReader.readLine()) != null) {
- builder.append(tmpContent);
- }
- bfReader.close();
- }
- catch (UnsupportedEncodingException localUnsupportedEncodingException)
- {
- }
- return filter(builder.toString());
- }
- private String filter(String input)
- {
- return input.replaceAll("/\\*[\\s\\S]*?\\*/", "");
- }
- }
我们再来看Uploader函数,其实很简单:
- package com.baidu.ueditor.upload;
- import com.baidu.ueditor.define.State;
- import java.util.Map;
- import javax.servlet.http.HttpServletRequest;
- public class Uploader
- {
- private HttpServletRequest request = null;
- private Map<String, Object> conf = null;
- public Uploader(HttpServletRequest request, Map<String, Object> conf) {
- this.request = request;
- this.conf = conf;
- }
- public final State doExec() {
- String filedName = (String)this.conf.get("fieldName");
- State state = null;
- if ("true".equals(this.conf.get("isBase64")))
- state = Base64Uploader.save(this.request.getParameter(filedName),
- this.conf);
- else {
- state = BinaryUploader.save(this.request, this.conf);
- }
- return state;
- }
- }
这个很好理解,我们接着来看BinaryUploader类:
- package com.baidu.ueditor.upload;
- import com.baidu.ueditor.PathFormat;
- import com.baidu.ueditor.define.BaseState;
- import com.baidu.ueditor.define.FileType;
- import com.baidu.ueditor.define.State;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.Arrays;
- import java.util.List;
- import java.util.Map;
- import javax.servlet.http.HttpServletRequest;
- import org.apache.commons.fileupload.FileItemIterator;
- import org.apache.commons.fileupload.FileItemStream;
- import org.apache.commons.fileupload.FileUploadException;
- import org.apache.commons.fileupload.disk.DiskFileItemFactory;
- import org.apache.commons.fileupload.servlet.ServletFileUpload;
- public class BinaryUploader
- {
- // 使用fileupload来处理文件上传
- public static final State save(HttpServletRequest request, Map<String, Object> conf)
- {
- FileItemStream fileStream = null;
- boolean isAjaxUpload = request.getHeader("X_Requested_With") != null;
- if (!ServletFileUpload.isMultipartContent(request)) {
- return new BaseState(false, 5);
- }
- ServletFileUpload upload = new ServletFileUpload(
- new DiskFileItemFactory());
- if (isAjaxUpload) {
- upload.setHeaderEncoding("UTF-8");
- }
- try
- {
- FileItemIterator iterator = upload.getItemIterator(request);
- while (iterator.hasNext()) {
- fileStream = iterator.next();
- if (!fileStream.isFormField())
- break;
- fileStream = null;
- }
- if (fileStream == null) {
- return new BaseState(false, 7);
- }
- String savePath = (String)conf.get("savePath");
- String originFileName = fileStream.getName();
- String suffix = FileType.getSuffixByFilename(originFileName);
- originFileName = originFileName.substring(0,
- originFileName.length() - suffix.length());
- savePath = savePath + suffix;
- long maxSize = ((Long)conf.get("maxSize")).longValue();
- if (!validType(suffix, (String[])conf.get("allowFiles"))) {
- return new BaseState(false, 8);
- }
- savePath = PathFormat.parse(savePath, originFileName);
- String physicalPath = (String)conf.get("rootPath") + savePath;
- // 调用存储类来处理文件存储
- InputStream is = fileStream.openStream();
- State storageState = StorageManager.saveFileByInputStream(is,
- physicalPath, maxSize);
- is.close();
- if (storageState.isSuccess()) {
- storageState.putInfo("url", PathFormat.format(savePath));
- storageState.putInfo("type", suffix);
- storageState.putInfo("original", originFileName + suffix);
- }
- return storageState;
- } catch (FileUploadException e) {
- return new BaseState(false, 6);
- } catch (IOException localIOException) {
- }
- return new BaseState(false, 4);
- }
- private static boolean validType(String type, String[] allowTypes) {
- List list = Arrays.asList(allowTypes);
- return list.contains(type);
- }
- }
StorageManager我们就不看了,无非就是做一些文件存储的一些事情,下面我们来分析下这种实现方式的问题。
最后我稍微总结下看这个代码得收获和对作者的建议:
- 从这个地方来看,无法将图片放置在外部路径,因为这种实现就决定了只能放到项目路径下,这个最大的问题就是,有可能不小心,重新上下线,内容全部丢了。
- 从实现来看,大量的使用静态调用,基本上无法二次开发,不能灵活的继承它来处理个性化的东西,比如如果存储到fastDFS里面,这个就需要改里面的代码,不能通过扩展的方式来进行
- config.json里面的配置项转换的时候,进行了重命名,这个地方就要求读者要记两个变量名,比如:imagePathFormat变成了savePath, 感觉好像挺好理解,但是这种明显不是好的方式,如果里面存在一个这个逻辑,最好显式的说明,而不是硬编码
- 源代码不开放,无法进行扩展和修改,建议作者开发这个jar到github里面,社区一块维护