kingeditor（jsp）与SSH三大框架整合上传图片出错问题解决方案(2)

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    out.println(getError("上传目录不存在。"));
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    return;
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}
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//检查目录写权限
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if(!uploadDir.canWrite()){
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    out.println(getError("上传目录没有写权限。"));
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    return;
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}
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String dirName = request.getParameter("dir");
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if (dirName == null) {
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    dirName = "image";
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}
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if(!extMap.containsKey(dirName)){
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    out.println(getError("目录名不正确。"));
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    return;
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}
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//创建文件夹
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savePath += dirName + "/";
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saveUrl += dirName + "/";
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File saveDirFile = new File(savePath);
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if (!saveDirFile.exists()) {
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    saveDirFile.mkdirs();
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}
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SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
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String ymd = sdf.format(new Date());
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savePath += ymd + "/";
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saveUrl += ymd + "/";
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File dirFile = new File(savePath);
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if (!dirFile.exists()) {
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    dirFile.mkdirs();
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}
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FileItemFactory factory = new DiskFileItemFactory();
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ServletFileUpload upload = new ServletFileUpload(factory);
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upload.setHeaderEncoding("UTF-8");
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List items = upload.parseRequest(request);
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Iterator itr = items.iterator();
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while (itr.hasNext()) {
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    FileItem item = (FileItem) itr.next();
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    String fileName = item.getName();
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    long fileSize = item.getSize();
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    if (!item.isFormField()) {
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        //检查文件大小
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        if(item.getSize() > maxSize){
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            out.println(getError("上传文件大小超过限制。"));
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            return;
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        }
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        //检查扩展名
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        String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
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        if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){
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            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。"));