最近几个项目都要用到在线编辑器，由于之前做在线编辑器都只在php上，对于用java尤其是springmvc框架时，似乎并不如PHP那么简单，搜集了很多博文和资料，全部都不能达到效果，最后在参考各种资料后，自己花时间写了一个上传图片的控制器，亲测保证能用。
1.图片上传控制器
package com.xishan.yueke.view.system; import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import java.util.Date;import java.util.HashMap;import java.util.Hashtable;import java.util.List;import java.util.Map;import java.util.Random; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.apache.commons.io.FileUtils;import org.json.simple.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile; import com.xishan.yueke.view.BaseAction; /** * Class Name: FileManageAction.java * Function: * 在线编辑器控制器 * @author Yang Ji. * @DateTime 2015年8月10日 下午8:26:50 * @version 1.0 */@Controllerpublic class FileManageAction extends BaseAction {// windows//private String PATH_LINE = "\\";// linuxprivate String PATH_LINE = "/";/** * 文件上传 * @param request {@link HttpServletRequest} * @param response {@link HttpServletResponse} * @return json response */@SuppressWarnings("unchecked")@RequestMapping(value = "/fileUpload", method = RequestMethod.POST)@ResponseBodypublic void fileUpload(HttpServletRequest request, HttpServletResponse response,@RequestParam("imgFile") MultipartFile[] imgFile) {try {response.setCharacterEncoding("utf-8");PrintWriter out = response.getWriter();//文件保存本地目录路径String savePath = request.getSession().getServletContext().getRealPath(PATH_LINE) + "kindeditor"+PATH_LINE+"attached"+PATH_LINE;//文件保存目录URLString saveUrl = request.getContextPath() + PATH_LINE +"kindeditor"+PATH_LINE+"attached"+PATH_LINE; if(!ServletFileUpload.isMultipartContent(request)){out.print(getError("请选择文件。"));out.close();return;}//检查目录File uploadDir = new File(savePath);if(!uploadDir.isDirectory()){out.print(getError("上传目录不存在。"));out.close();return;}//检查目录写权限if(!uploadDir.canWrite()){out.print(getError("上传目录没有写权限。"));out.close();return;} String dirName = request.getParameter("dir");if (dirName == null) {dirName = "image";}//定义允许上传的文件扩展名Map<String, String> extMap = new HashMap<String, String>();extMap.put("image", "gif,jpg,jpeg,png,bmp");extMap.put("flash", "swf,flv");extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,xml,txt,zip,rar,gz,bz2");if(!extMap.containsKey(dirName)){out.print(getError("目录名不正确。"));out.close();return;}//创建文件夹savePath += dirName + PATH_LINE;saveUrl += dirName + PATH_LINE;File saveDirFile = new File(savePath);if (!saveDirFile.exists()) {saveDirFile.mkdirs();}SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");String ymd = sdf.format(new Date());savePath += ymd + PATH_LINE;saveUrl += ymd + PATH_LINE;File dirFile = new File(savePath);if (!dirFile.exists()) {dirFile.mkdirs();}//最大文件大小long maxSize = 1000000;// 保存文件for(MultipartFile iFile : imgFile){String fileName = iFile.getOriginalFilename();//检查文件大小if(iFile.getSize() > maxSize){out.print(getError("上传文件大小超过限制。"));out.close();return;}//检查扩展名String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){//return getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。");out.print(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));out.close();return;} SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;try{File uploadedFile = new File(savePath, newFileName);// 写入文件FileUtils.copyInputStreamToFile(iFile.getInputStream(), uploadedFile);}catch(Exception e){out.print(getError("上传文件失败。"));out.close();return;}JSONObject obj = new JSONObject(); obj.put("error", 0); obj.put("url", saveUrl + newFileName); out.print(obj.toJSONString());out.close();}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}} private Map<String, Object> getError(String errorMsg) {Map<String, Object> errorMap = new HashMap<String, Object>();errorMap.put("error", 1);errorMap.put("message", errorMsg);return errorMap;}/** * 文件空间 * @param request {@link HttpServletRequest} * @param response {@link HttpServletResponse} * @return json */@SuppressWarnings("unchecked")@RequestMapping(value = "/fileManager")@ResponseBodypublic void fileManager(HttpServletRequest request, HttpServletResponse response) {try {//根目录路径，可以指定绝对路径String rootPath = request.getSession().getServletContext().getRealPath(PATH_LINE) + "kindeditor"+PATH_LINE+"attached"+PATH_LINE;//根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/String rootUrl = request.getContextPath() + PATH_LINE+"kindeditor"+PATH_LINE+"attached"+PATH_LINE;response.setContentType("application/json; charset=UTF-8");PrintWriter out = response.getWriter();//图片扩展名String[] fileTypes = new String[]{"gif", "jpg", "jpeg", "png", "bmp"}; String dirName = request.getParameter("dir");if (dirName != null) {if(!Arrays.<String>asList(new String[]{"image", "flash", "media", "file"}).contains(dirName)){out.print("无效的文件夹。");out.close();return;}rootPath += dirName + PATH_LINE;rootUrl += dirName + PATH_LINE;File saveDirFile = new File(rootPath);if (!saveDirFile.exists()) {saveDirFile.mkdirs();}}//根据path参数，设置各路径和URLString path = request.getParameter("path") != null ? request.getParameter("path") : "";String currentPath = rootPath + path;String currentUrl = rootUrl + path;String currentDirPath = path;String moveupDirPath = "";if (!"".equals(path)) {String str = currentDirPath.substring(0, currentDirPath.length() - 1);moveupDirPath = str.lastIndexOf(PATH_LINE) >= 0 ? str.substring(0, str.lastIndexOf(PATH_LINE) + 1) : "";} //排序形式，name or size or typeString order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name"; //不允许使用..移动到上一级目录if (path.indexOf("..") >= 0) {out.print("访问权限拒绝。");out.close();return;}//最后一个字符不是/if (!"".equals(path) && !path.endsWith(PATH_LINE)) {out.print("无效的访问参数验证。");out.close();return;}//目录不存在或不是目录File currentPathFile = new File(currentPath);if(!currentPathFile.isDirectory()){out.print("文件夹不存在。");out.close();return;} //遍历目录取的文件信息List<Map<String, Object>> fileList = new ArrayList<Map<String, Object>>();if(currentPathFile.listFiles() != null) {for (File file : currentPathFile.listFiles()) {Hashtable<String, Object> hash = new Hashtable<String, Object>();String fileName = file.getName();if(file.isDirectory()) {hash.put("is_dir", true);hash.put("has_file", (file.listFiles() != null));hash.put("filesize", 0L);hash.put("is_photo", false);hash.put("filetype", "");} else if(file.isFile()){String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();hash.put("is_dir", false);hash.put("has_file", false);hash.put("filesize", file.length());hash.put("is_photo", Arrays.<String>asList(fileTypes).contains(fileExt));hash.put("filetype", fileExt);}hash.put("filename", fileName);hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));fileList.add(hash);}} if ("size".equals(order)) {Collections.sort(fileList, new SizeComparator());} else if ("type".equals(order)) {Collections.sort(fileList, new TypeComparator());} else {Collections.sort(fileList, new NameComparator());} JSONObject result = new JSONObject();result.put("moveup_dir_path", moveupDirPath);result.put("current_dir_path", currentDirPath);result.put("current_url", currentUrl);result.put("total_count", fileList.size());result.put("file_list", fileList);out.println(result.toJSONString());out.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private class NameComparator implements Comparator<Map<String, Object>> {public int compare(Map<String, Object> hashA, Map<String, Object> hashB) {if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {return -1;} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {return 1;} else {return ((String)hashA.get("filename")).compareTo((String)hashB.get("filename"));}}}private class SizeComparator implements Comparator<Map<String, Object>> {public int compare(Map<String, Object> hashA, Map<String, Object> hashB) {if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {return -1;} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {return 1;} else {if (((Long)hashA.get("filesize")) > ((Long)hashB.get("filesize"))) {return 1;} else if (((Long)hashA.get("filesize")) < ((Long)hashB.get("filesize"))) {return -1;} else {return 0;}}}}private class TypeComparator implements Comparator<Map<String, Object>> {public int compare(Map<String, Object> hashA, Map<String, Object> hashB) {if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {return -1;} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {return 1;} else {return ((String)hashA.get("filetype")).compareTo((String)hashB.get("filetype"));}}}}
2.jsp页面使用方法（在head加入下面代码，替换名为description的编辑区，在此之前需导入kindeditor的相关文件，详见官方文档）
<script type="text/javascript">KindEditor.ready(function(K) {K.create('textarea[name="descript"]', {uploadJson : 'http://localhost:8080/Test/fileUpload.htm', fileManagerJson : 'http://localhost:8080/Test/fileManager.htm', allowFileManager : true, allowImageUpload : true, autoHeightMode : true,width : "640px",height : "400px",afterCreate : function() {this.loadPlugin('autoheight');},afterBlur : function(){ this.sync(); } //Kindeditor下获取文本框信息});});</script>
使用其他的框架（比如Spring+Struts+Hibernate）方法大致相同，最终效果如下：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。
本文标题: SpringMVC KindEditor在线编辑器之文件上传代码实例
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