Ajax异步上传多个文件并返回文件路径

前端JSP页面代码

<label>附件：</label>
<form id="fileForm">
    <input type="file" name="files"  multiple="multiple" >
    <input type="button" id="btn_add_file" value="上传附件"  onclick="upload_files()">
</form>
<script>

function upload_files(){
    var formData = new FormData($("#fileForm")[0]);
    $.ajax({
        url : path.basePath+"file/uploadFiles2.do",
        type: 'POST',
        data: formData,
        async: false,
        cache: false,
        contentType: false,
        processData: false,
        success : function(data) {
            alert("成功了！"+data);
        },
        error : function(data) {
            alert("失败了！"+data);
        }
    });

</script>

java springMVC后台代码

@RequestMapping(value = "uploadFiles2.do", method = RequestMethod.POST)
@ResponseBody
public String uploadFiles2(@RequestParam(value="files")List<MultipartFile> list,HttpServletRequest request) {
    System.out.println("**************************进入uploadFiles2方法*********************************");
    Map<String,String> map = new HashMap<String,String>();
    try {
        for (MultipartFile file : list) {
            String fileName = file.getOriginalFilename();
            String saveName = UUID.randomUUID().toString().replace("-","") + fileName.substring(fileName.lastIndexOf("."));
            String savedPath = request.getSession().getServletContext().getRealPath("/uploadFiles/");//获取服务器指定文件存取路径
            File saveDir = new File(savedPath);
            if (!saveDir.exists()){
                saveDir.mkdirs();
            }
            File saveFile = new File(savedPath, saveName);
            System.out.println(saveFile);
            map.put(fileName,saveFile.toString());
            file.transferTo(saveFile);
        }
        return map.toString();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}