@RestController
public class FilesUploadController {
 
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd/");
 
  @RequestMapping("/uploads")
  public String upload(MultipartFile[] uploadFiles, HttpServletRequest request) {
    List list = new ArrayList();//存储生成的访问路径
    if (uploadFiles.length > 0) {
      for (int i = 0; i < uploadFiles.length; i++) {
        MultipartFile uploadFile = uploadFiles[i];
        //设置上传文件的位置在该项目目录下的uploadFile文件夹下，并根据上传的文件日期，进行分类保存
        String realPath = request.getSession().getServletContext().getRealPath("uploadFile");
        String format = sdf.format(new Date());
        File folder = new File(realPath + format);
        if (!folder.isDirectory()) {
          folder.mkdirs();
        }
 
        String oldName = uploadFile.getOriginalFilename();
        System.out.println("oldName = " + oldName);
        String newName = UUID.randomUUID().toString() + oldName.
            substring(oldName.lastIndexOf("."), oldName.length());
        System.out.println("newName = " + newName);
        try {
          //保存文件
          uploadFile.transferTo(new File(folder, newName));
 
          //生成上传文件的访问路径
          String filePath = request.getScheme() + "://" + request.getServerName() + ":"+ request.getServerPort() + "/uploadFile" + format + newName;
          list.add(filePath);
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
      return list.toString();
    } else if (uploadFiles.length == 0) {
      return "请选择文件";
    }
    return "上传失败";
  }
}

#是否开启文件上传支持，默认是true
spring.servlet.multipart.enabled=true 
#文件写入磁盘的阈值，默认是0
spring.servlet.multipart.file-size-threshold=0
#上传文件的临时保存位置
spring.servlet.multipart.location=D:\\upload
#单个文件的最大值，默认是1MB
spring.servlet.multipart.max-file-size=1MB
#多个文件上传时的总大小 值，默认是10MB
spring.servlet.multipart.max-request-size=10MB
#是否延迟解析，默认是false
spring.servlet.multipart.resolve-lazily=false