Java实现文件上传功能

 

@RequestMapping(value="/fileUpload", method = RequestMethod.POST)
//    @RequestParam(value="file",required=false)MultipartFile[] files
    public @ResponseBody HashMap<String,Object> fileUpload(@RequestParam(value="file",required=false)MultipartFile[] files,HttpServletRequest request,HttpServletResponse response)throws Exception{
        HashMap<String,Object> res = new HashMap<String,Object>();
        System.err.println("上传");
        String curMonth = ObjectTools.getCurMonth();
        String currDir = env.getProperty("needUploadPath")+curMonth;
        logger.info("文件上传路径为:"+currDir);
        File file = new File(currDir);
        if (!file.exists()) file.mkdirs();
        List<Map<String,String>> fileNameList = new ArrayList<Map<String,String>>();
        if(files != null){
            logger.info("files是什么玩意儿:"+files.length);
        }
        if(files != null && files.length>0){
            for(MultipartFile mf : files){
                String file_init = mf.getOriginalFilename(); //得到文件名称
                String fix = file_init.substring(file_init.indexOf("."),file_init.length());
                String file_new = System.currentTimeMillis() + fix; //生成一个新的文件名称

                String dstPathAndFile = currDir + "/" + file_new;
                File file1 = new File(dstPathAndFile); // 新建一个文件
                try {
                    mf.transferTo(file1);
                    logger.info("=======文件上传成功===="+dstPathAndFile);
                } catch (Exception e) {
                    e.printStackTrace();
                    throw e;
                }
                Map<String,String> rsMap = new HashMap<String,String>();
                rsMap.put("file_init", file_init);
                rsMap.put("file_new", file_new);
                rsMap.put("path",currDir);
                rsMap.put("curMonth",curMonth);
                fileNameList.add(rsMap);
            }
            res.put("code",1);
            res.put("dataList",fileNameList);
        }
        return res;
    }