JAVA文件的上传与访问

/**
 * 各种文件上传与判断
 * types 文件类型(1图片 2视频 3文件）
 */
@RequestMapping(method = RequestMethod.POST, path = "/uploadFile")
@ResponseBody
public Object uploadFile(@RequestPart("file") MultipartFile file, Integer types) {
    if (ToolUtil.isOneEmpty(file, types)) {
        return ResultUtil.paramError();
    }
    String name = file.getOriginalFilename();
    String[] fileNames = name.split("\\.");
    String suffix = fileNames[fileNames.length - 1];

    Boolean is = false;
    if (1 == types) {
        is = validateImager(suffix);
    } else if (2 == types) {
        is = validateVideo(suffix);
    } else if (3 == types) {
        is = validateFile(suffix);
    }
    if (!is) {
        return ResultUtil.error(1, "上传文件格式错误!");
    }

    String fileName = UUID.randomUUID().toString() + "." + suffix;
    try {
        String fileSavePath = guns.getFileUploadPath();
        file.transferTo(new File(fileSavePath + fileName));
    } catch (Exception e) {
        throw new GunsException(BizExceptionEnum.UPLOAD_ERROR);
    }
    Map<String, Object> data = new HashMap<>();
    data.put("url", guns.getProjPath() + "/file/" + fileName);
    data.put("fileName", fileName);
    return ResultUtil.success(data);
}

//验证上传文件（图片）
public Boolean validateImager(String suffix) {
    List<String> suffixList = Arrays.asList("jpg", "png", "gif", "jpeg", "bmp");
    //判断后缀格式是否正确
    if (suffixList.contains(suffix)) {
        return true;
    } else {
        return false;
    }
}

//验证上传文件（视频）
public Boolean validateVideo(String suffix) {
    List<String> suffixList = Arrays.asList("avi", "wmv", "mpeg", "mp4", "mov", "mkv", "flv", "f4v", "m4v", "rmvb", "rm",
            "3gp", "dat", "ts", "mts", "vob");
    //判断后缀格式是否正确
    if (suffixList.contains(suffix)) {
        return true;
    } else {
        return false;
    }
}

//验证上传文件（文件）
public Boolean validateFile(String suffix) {
    List<String> suffixList = Arrays.asList("css", "js", "txt");
    //判断后缀格式是否正确
    if (suffixList.contains(suffix)) {
        return true;
    } else {
        return false;
    }
}

/**
 * 读取文件内容
 */
@RequestMapping("/{fileId:.+}")
public void renderPicture(@PathVariable("fileId") String fileId, HttpServletResponse response) {
    String path = guns.getFileUploadPath() + fileId;
    try {
        byte[] bytes = FileUtil.toByteArray(path);
        response.getOutputStream().write(bytes);//有值返回参数
    } catch (Exception e) {
        //如果找不到图片就返回一个默认图片
        try {
            response.sendRedirect("/static/imager/0.jsp");//文件不存在默认加载文件
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }
}