多张图片上传功能java后端代码实现,并返回访问的图片的url

1.controller代码

/**
 * 图片上传功能
 *
 * @param multipartFile //图片文件
 * @param missionId
 * @return
 */
@ResponseBody
@RequestMapping(value = "/upload", method = RequestMethod.POST, headers = "content-type=multipart/form-data")
public ResponseEntity<Map<String, Object>> imageUploa(@RequestParam("multipartFile") MultipartFile[] multipartFile,
                                                      @RequestParam("missionId") String missionId, HttpServletRequest request) {
    Map<String, Object> message = Maps.newHashMap();
    //照片路径info
    String info = "";
    //照片路径列表list
    ArrayList<String> list = new ArrayList<>();
    for (MultipartFile file : multipartFile) {
        info = missionService.uploadPictureByFile(missionId, file);
        list.add(info);
    }
    if (list.size() > 0) {
        //图片上传成功
        message.put("data", list);
        message.put(Constant.RETURNCODE_KEY_OPTRESULT, Constant.AUTH_SUCCESS);
        return ResponseEntity.ok(message);
    }
    //图片上传失败
    message.put(Constant.RETURNCODE_KEY_OPTRESULT, Constant.INVALID_PARAM);
    return new ResponseEntity<Map<String, Object>>(
            message,
            HttpStatus.BAD_REQUEST);
}



2.service代码

/**
 * 图片上传方法,并把图片访问路径保存到数据库
 *
 * @param missionId
 * @param file
 * @return //返回上传成功的url
 */

/**
 * 图片上传到服务器的保存路径
 */
public static final String PICTUREURL = Global.getConfig("PICTUREURL");//配置在配置文件中

/**
 * 图片上传的服务器和二维码生的服务器
 */
public static final String CONFIGUREURL = Global.getConfig("CONFIGUREURL");//配置在配置文件中

@Transactional(readOnly = false, rollbackFor = Exception.class)
public String uploadPictureByFile(String missionId, MultipartFile file) {
    String filename1 = "picture_" + UUID.randomUUID() + ".jpg";//生成唯一图片路径
    if (!file.isEmpty()) {
        String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);
        //设置允许上传文件类型
        String suffixList = "jpg,png,ico,bmp,jpeg";
        if (suffixList.contains(suffix)) {
            try {
                File filepath = new File(PICTUREURL);
                if (!filepath.exists()) {
                    filepath.mkdirs();
                }
                // 文件保存路径
                String savePath = PICTUREURL + filename1;
                // 转存文件
                file.transferTo(new File(savePath));
                String url = CONFIGUREURL + filename1;
                missionDao.saveMissionPic(missionId, url,new Date()); //本项目用于保存图片的url的数据库插入数据
                return url;
            } catch (Exception e) {
                e.printStackTrace();
                return String.valueOf(e);
            }
        } else {
            return "上传的文件不是图片";
        }

    } else {
        return "请选择图片上传";
    }
}