SpringMVC + Kindeditor时List items = upload.parseRequest(request);为空

问题描述： 根据Kindeditor给的demo，结合SpringMVC使用时，

List items = upload.parseRequest(request);

item始终为空。

@Controller
@IfNeedLogin(needLogin = false)
@RequestMapping("/kindeditor")
public class KEUploadController extends BaseController {

	private Logger logger = LoggerFactory.getLogger(KEUploadController.class);

	@RequestMapping(value = "/upload", method = { RequestMethod.GET,
			RequestMethod.POST })
	public void upload(HttpServletRequest request, HttpServletResponse response)
			throws FileUploadException, IOException {
		logger.debug("Kindeditor上传文件");
		PrintWriter writer = response.getWriter();
		ServletContext servletContext = request.getSession()
				.getServletContext();

		// 文件保存目录路径
		String savePath = servletContext.getRealPath("/") + "attached/";

		// 文件保存目录URL
		String saveUrl = request.getContextPath() + "/attached/";

		// 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");

		// 最大文件大小
		long maxSize = 1000000;

		response.setContentType("text/html; charset=UTF-8");

		if (!ServletFileUpload.isMultipartContent(request)) {
			writer.println(getError("请选择文件。"));
			return;
		}
		// 检查目录
		File uploadDir = new File(savePath);
		if (!uploadDir.isDirectory()) {
			writer.println(getError("上传目录不存在。"));
			return;
		}
		// 检查目录写权限
		if (!uploadDir.canWrite()) {
			writer.println(getError("上传目录没有写权限。"));
			return;
		}

		String dirName = request.getParameter("dir");
		if (dirName == null) {
			dirName = "image";
		}
		if (!extMap.containsKey(dirName)) {
			writer.println(getError("目录名不正确。"));
			return;
		}
		// 创建文件夹
		savePath += dirName + "/";
		saveUrl += dirName + "/";
		File saveDirFile = new File(savePath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
		String ymd = sdf.format(new Date());
		savePath += ymd + "/";
		saveUrl += ymd + "/";
		File dirFile = new File(savePath);
		if (!dirFile.exists()) {
			dirFile.mkdirs();
		}

		FileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");
		List items = upload.parseRequest(request);
		Iterator itr = items.iterator();
		while (itr.hasNext()) {
			FileItem item = (FileItem) itr.next();
			String fileName = item.getName();
			long fileSize = item.getSize();
			if (!item.isFormField()) {
				// 检查文件大小
				if (item.getSize() > maxSize) {
					writer.println(getError("上传文件大小超过限制。"));
					return;
				}
				// 检查扩展名
				String fileExt = fileName.substring(
						fileName.lastIndexOf(".") + 1).toLowerCase();
				if (!Arrays.<String> asList(extMap.get(dirName).split(","))
						.contains(fileExt)) {
					writer.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;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
				String newFileName = df.format(new Date()) + "_"
						+ new Random().nextInt(1000) + "." + fileExt;
				try {
					File uploadedFile = new File(savePath, newFileName);
					item.write(uploadedFile);
				} catch (Exception e) {
					writer.println(getError("上传文件失败。"));
					return;
				}

				JSONObject obj = new JSONObject();
				obj.put("error", 0);
				obj.put("url", saveUrl + newFileName);
				writer.println(obj.toJSONString());
			}
		}
	}

	private String getError(String message) {
		JSONObject obj = new JSONObject();
		obj.put("error", 1);
		obj.put("message", message);
		return obj.toJSONString();
	}

}

解决方案1：

去掉配置文件：

	 <!-- 上传文件时需要做的配置 -->  
<!--     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
        <property name="maxUploadSize" value="5000000"></property>
        <property name="maxInMemorySize" value="4096" />  
    	<property name="defaultEncoding" value="UTF-8" />  
    </bean> -->