devtools启动Springboot程序后，上传文件到服务器

通常我们在写sprintgboot程序时，为了防止重复启动应用程序，都会加入热启动的相关配置。通常默认的配置对于我们大多数开发已经否用了。引入依赖如下：

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <version>1.5.8.RELEASE</version>
      <optional>true</optional>
</dependency>

但是，当我们在做上传文件到本地服务器，比如classpath目录后，由于devtools检测到classpath目录的文件发生了改变，便会自动重启，而此时的重启并不是我们需要的。所以我们便需要做如下配置，其目的是额外排除需要重启的目录，如下：static目录下的所有子目录和文件将被devtools额外排除。

spring:
  devtools:
    livereload:
      enabled: true
    restart:
      additional-exclude: static/**

上传文件到本地服务器的接口一般采用POST接口，上传一个或者多个文件到本地服务器上的某个指定目录，并更改文件名。

@ApiOperation(value = "上传一个或多个文件到指定的文件夹内", notes = "/industries/mains/{industryId}/upload?folderName=xxx")
    @PostMapping(value = "/mains/{industryId}/import")
    public void upload(@PathVariable Integer industryId, @RequestPart("files") MultipartFile[] files, @RequestParam String folderName) throws Exception {

        if (industryId == null || industryId <= 0) {
            throw new BizException(BizExceptEnum.RecordNotExist);
        }
        if (files == null || files.length < 1) {
            throw new BizException(BizExceptEnum.FileUploadZeroFile);
        }
        for (MultipartFile file : files) {
            if (file == null) {
                throw new BizException(BizExceptEnum.FileIsNull);
            }
            if (file.isEmpty()) {
                throw new BizException(BizExceptEnum.FileIsEmpty);
            }
            String fileName = file.getOriginalFilename();
            if (StringUtils.isEmpty(fileName)) {
                throw new BizException(BizExceptEnum.FileEmptyFileName);
            }
        }

        File classPath = new File(ResourceUtils.getURL(MsConstants.MS_CLASS_PATH).getPath());
        if (!classPath.exists()) classPath = new File("");
        String uploadPath = classPath.getAbsolutePath() + MsConstants.MS_STATIC_PATH + folderName;
        FileUtil.getInstance().newFolder(uploadPath);

        Map<String, String> map = new HashMap<>();
        for (MultipartFile file : files) {
            String fileName = file.getOriginalFilename();
            String suffix = FileUtil.getInstance().getFileType(fileName);
            String fileNameNonSuffix = FileUtil.getInstance().getFileNameNonSuffix(fileName);
            String fileCode = industryId + "_" + fileNameNonSuffix + "_" + DateUtils.format(new Date(), DateUtils.FORMAT_FULL_ORDER_TOMIMUTE);
            String ossFileName = fileCode + "." + suffix;
            String uploadFullFileName = uploadPath + "/" + ossFileName;
            File serverFile = new File(uploadFullFileName);
            file.transferTo(serverFile);
        }
    }