微信小程序之JAVA后台上传图片，并且返回图片路径

@RequestMapping(value = "/image", method = {RequestMethod.POST, RequestMethod.GET})
    public QsMap uploadPicture(HttpServletRequest request, HttpServletResponse response) throws IOException {
        QsMap qsMap = new QsMap();//自定义Map
        //获取上传文件的主文件名与扩展名
        MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;
        MultipartFile multipartFile = req.getFile("file");
        //获取上传时的名称
        String fileName = multipartFile.getOriginalFilename();
        //根据文件扩展名得到文件类型
        String type = getFileType(fileName);
        //存放图片的绝对路径
        String realPath = "J:/apache-tomcat-7.0.52/webapps/uploadimage/aftersale";
        //格式化时间戳
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String nowTime = sdf.format(new Date().getTime());
        //裁剪图片名称
//        String originalFirstName = multipartFile.getOriginalFilename();
//        String picFirstName = originalFirstName.substring(0, originalFirstName.indexOf("."));
        //取得图片的格式后缀
        String originalLastName = multipartFile.getOriginalFilename();
        String picLastName = originalLastName.substring(originalLastName.lastIndexOf("."));
        try {
            File dir = new File(realPath);
            //如果文件目录不存在，创建文件目录
            if (!dir.exists()) {
                dir.mkdir();
            }
            //拼接 名字+时间戳+后缀
            String picName = nowTime + UUID.randomUUID() + picLastName;
            File file = new File(realPath,picName);
            multipartFile.transferTo(file);
//            qsMap.put("file",file); //全路径
            qsMap.put("file","uploadimage/aftersale/" + picName);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        }
        return qsMap;
    }

@ApiOperation(value = "图片上传",notes = "UploadPic")
    @RequestMapping(value = "/image", method = {RequestMethod.POST, RequestMethod.GET})
    public QsMap uploadPicture(HttpServletRequest request, HttpServletResponse response) throws IOException {
        QsMap qsMap = new QsMap();
        //获取上传文件的主文件名与扩展名
        MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;
        //对应前端的upload的name参数"file"
        MultipartFile multipartFile = req.getFile("file");
        //获取上传时的名称
        String fileName = multipartFile.getOriginalFilename();
        //存放图片的绝对路径
        String realPath = "J:\\apache-tomcat-7.0.52\\webapps\\uploadimage\\aftersale";
        //格式化时间戳
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        //System.currentTimeMillis() 是直接调用本地方法，而 new Date().getTime() 确还要创建一个Date对象，降低了效率和占用了内存(虽然损耗很小)。
        String nowTime = sdf.format(System.currentTimeMillis());
        //取得图片的格式后缀
        String originalLastName = multipartFile.getOriginalFilename();
        String picLastName = originalLastName.substring(originalLastName.lastIndexOf("."));
        //判断上传格式
        if(picLastName.equals(".jpg") || picLastName.equals(".gif") || picLastName.equals(".png") || picLastName.equals(".jpeg")){
            try {
                File dir = new File(realPath);
                //如果文件目录不存在，创建文件目录
                if (!dir.exists()) {
                    dir.mkdirs();  //目录的操作与删除 mkdir()：创建一级目录  mkdirs()：创建多级目录  delete()：删除目录或文件
                }
                //拼接 名字+时间戳+后缀
                String picName = nowTime + UUID.randomUUID() + picLastName;
                File file = new File(realPath,picName);
                multipartFile.transferTo(file);
                //全路径
                qsMap.put("file","http://60.30.201.10:8093/PhotoService/storeroomUploadImage/aftersale/" + picName);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            }
        }else{
            qsMap.put("上传了不合法的图片后缀!",picLastName);
        }
        return qsMap;
    }