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    在upload_json.jsp页面中,

FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("UTF-8");
List items = upload.parseRequest(request);

    得到的items集合是空的，查了下原因，是由于我的request 是通过struts2的

ServletActionContext.getRequest()方法获取的，导致取不到值。

    最后干脆使用原生的servlet 来得到request，上传正常。

    可参考网站: http://zhidao.baidu.com/question/128690300.html

    ps: 昨天论坛闲逛无意中发现kindEditor编辑器，风格第一感觉还不错，没想到今天就能使用了。继续关注中.....

楼主，谢谢分享。

我是直接替换upload_json.jsp文件

替换后的内容如下：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*,java.io.*" %> 
<%@ page import="java.text.SimpleDateFormat" %> 
<%@ page import="org.apache.commons.fileupload.*" %> 
<%@ page import="org.apache.commons.fileupload.disk.*" %> 
<%@ page import="org.apache.commons.fileupload.servlet.*" %> 
<%@ page import="org.json.simple.*" %> 
<%@ page import="org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper" %> 
  
<% 
//文件保存目录路径     
//D:\Tomcat6.0\webapps\zswz\attached/ 
String savePath = request.getSession().getServletContext().getRealPath("/") + "kindeditor/attached/"; 
//文件保存目录URL /zswz/attached/ 
String saveUrl = request.getContextPath() + "/kindeditor/attached/"; 
//定义允许上传的文件扩展名 
//定义允许上传的文件扩展名 
HashMap<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,txt,zip,rar,gz,bz2"); 
  
//允许最大上传文件大小 struts.xml struts.multipart.maxSize=3G 
long maxSize = 3000000000l; 
  
response.setContentType("text/html; charset=UTF-8"); 
  
if(!ServletFileUpload.isMultipartContent(request)){ 
    out.println(getError("请选择文件。")); 
    return; 
} 
//检查目录 
File uploadDir = new File(savePath); 
if(!uploadDir.isDirectory()){ 
    out.println(getError("上传目录不存在。")); 
    return; 
} 
//检查目录写权限 
if(!uploadDir.canWrite()){ 
    out.println(getError("上传目录没有写权限。")); 
    return; 
} 
  
String dirName = request.getParameter("dir");//image 
if (dirName == null) { 
    dirName = "image"; 
} 
if(!extMap.containsKey(dirName)){ 
    out.println(getError("目录名不正确。")); 
    return; 
} 
//创建文件夹 
savePath += dirName + "/";//D:\Tomcat6.0\webapps\zswz\attached/image/ 
saveUrl += dirName + "/";///zswz/attached/image/ 
File saveDirFile = new File(savePath); 
if (!saveDirFile.exists()) { 
    saveDirFile.mkdirs(); 
} 
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); 
String ymd = sdf.format(new Date()); 
savePath += ymd + "/";//D:\Tomcat6.0\webapps\zswz\attached/image/20111129/ 
saveUrl += ymd + "/";///zswz/attached/image/20111129/ 
File dirFile = new File(savePath); 
if (!dirFile.exists()) { 
    dirFile.mkdirs(); 
} 
if (!dirFile.isDirectory()) { 
    out.println(getError("上传目录不存在 。")); 
    return; 
} 
//检查目录写入权限 
if (!dirFile.canWrite()) { 
    out.println(getError("上传目录没有写入权限。")); 
    return; 
} 
  
//Struts2 请求 包装过滤器 
MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request; 
//获得上传的文件名 
String fileName = wrapper.getFileNames("imgFile")[0];//imgFile,imgFile,imgFile 
//获得文件过滤器 
File file = wrapper.getFiles("imgFile")[0]; 
  
//检查扩展名 
String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase(); 
if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){ 
    out.println(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。")); 
    return; 
} 
//检查文件大小 
if (file.length() > maxSize) { 
        out.println(getError("上传文件大小超过限制。")); 
        return; 
}  
  
  
//重构上传图片的名称  
SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); 
String newImgName = df.format(new Date()) + "_"
                + new Random().nextInt(1000) + "." + fileExt; 
byte[] buffer = new byte[1024]; 
//获取文件输出流 
FileOutputStream fos = new FileOutputStream(savePath +"/" + newImgName); 
//获取内存中当前文件输入流 
InputStream in = new FileInputStream(file); 
try { 
        int num = 0; 
        while ((num = in.read(buffer)) > 0) { 
                fos.write(buffer, 0, num); 
        } 
} catch (Exception e) { 
        e.printStackTrace(System.err); 
} finally { 
        in.close(); 
        fos.close(); 
} 
//发送给 KE  
JSONObject obj = new JSONObject(); 
obj.put("error", 0); 
obj.put("url", saveUrl +"/" + newImgName); 
///zswz/attached/image/20111129/  image 20111129195421_593.jpg 
out.println(obj.toJSONString()); 
%> 
<%! 
private String getError(String message) { 
    JSONObject obj = new JSONObject(); 
    obj.put("error", 1); 
    obj.put("message", message); 
    return obj.toJSONString(); 
} 
%> 

这个在XP下面使用是没任何问题的，但是一到windows server 2003上面就报错了。请问是为什么呢？谢谢。！

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