上传路径的问题

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@RequestMapping(method = RequestMethod.POST)
	public String save(Book book,HttpServletRequest request){
		if(book.getUsers()!=null){
			book.getUsers().add(getCurrentUser(request));
		}else{
			List<User> users = Lists.newArrayList(getCurrentUser(request));
			book.setUsers(users);
		}
		
		//String dirPath = book.getName();
		//book.setDirPath(dirPath);
		
//		if(!dirPath.isEmpty()&dirPath!=null){
//			dirPath = dirPath.split(request.getContextPath()+"/",0)[1];
//			book.setDirPath(dirPath);
		//}
		bookService.save(book);
		return "redirect:/book";
	}
	
	/**
     * 上传课件
     * 
     * @param Filedata
     * @param request
     * @param fold
     * @return
     * @throws IOException
     */
    @RequestMapping(value = "/upload", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String upload(MultipartFile Filedata, HttpServletRequest request, String fold) throws IOException {
        //String path = "/image?path=" + Constants.UPLOAD_IMAGE +"/"+ fold;
        String fileName = Filedata.getOriginalFilename();
        //String path = "/image?path=" + Constants.UPLOAD_IMAGE +"/"+ fileName;
        //利用filename和Constants.UPLOAD_IMAGE组成一个路径
        String realPath = Constants.UPLOAD_IMAGE +"/"+ fileName;
        //存文件
        FileUtils.copyInputStreamToFile(Filedata.getInputStream(), new File(realPath));
        //注意，这里返回的是fileName，而不是路径，因为如果放路径，就有一定安全性，及通用性差
        return fileName;
    }

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<input type = "hidden" id = "dirPath" name= "dirPath" />

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<tr>
							<th>选择封面插图：</th>
							<td><input type="file" name="uploadify" id="uploadify" />
								<h6>*只支持单个图片上传</h6>
								<div id="fileQueue"></div></td>
						</tr>
				<tr>
					<th>书籍名称:</th>
					<td><input type = "text" id="name" name = "name" placeholder="书籍名称"  validate="required" validate-message="不能为空！" class="form-control"/></td>
				</tr>

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function onSelect(file){
	var fileName=file.name;
	//fileName=fileName.substring(0,fileName.lastIndexOf("."));
	//给id="name"注入值，为fileName
	//alert(fileName);
	$("#name").val(fileName);
	$("#dirPath").val(file.name);
}

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	/**
	 * 取图片
	 * @param response
	 * @param path
	 * @throws IOException
	 */
	@RequestMapping(params = {"path"},method = RequestMethod.GET)
    public void getImage(HttpServletResponse response,String path) throws IOException {
		//这里将路径组织一下，组织成上传的路径
		path = Constants.UPLOAD_IMAGE+"/"+path;
        File file = new File(path);
        getImage(file, response);
    }
	
	public void getImage(File file,HttpServletResponse response) throws IOException {
        
        FileInputStream inputStream = new FileInputStream(file);
        byte[] data = new byte[(int)file.length()];
        inputStream.read(data);
        inputStream.close();
        
        String[] f =  file.getPath().split("\.");
        String contentType = f[f.length-1].toLowerCase();
        //contentType = MIMEPropertiesReader.getProperty(contentType);
        response.setContentType(contentType);
        
        OutputStream stream = response.getOutputStream();
        stream.write(data);
        stream.flush();
        stream.close();
    }