springboot实现单文件和多文件上传

package com.heeexy.example.controller;

import com.alibaba.fastjson.JSONObject;
import com.heeexy.example.util.CommonUtil;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.util.*;

@RestController
@RequestMapping("/common")
public class UploadController {
 //设置上传文件夹
 File uploadPath = null;

 //单文件上传
 @PostMapping("/upload")
 public JSONObject upload(@RequestParam(value = "file", required = false)MultipartFile file,HttpServletRequest request) throws Exception{
 //定义返回客户端json对象
 JSONObject returnData = new JSONObject();
 //定义处理流对象
 BufferedOutputStream out = null;

 //将request对象转成JSONObject对象
 JSONObject jsonObject = CommonUtil.request2Json(request);
 //验证必填字段
 CommonUtil.hasAllRequired(jsonObject,"user_id,equi_id,upload_type");

 //获取当前用户id
 String user_id = jsonObject.getString("user_id");
 //获取当前设备id
 String equi_id = jsonObject.getString("equi_id");
 //获取上传文件的类型 1:巡检 2:维保
 String upload_type = jsonObject.getString("upload_type");

 //判断上传文件类型并设置前置路径
 File uploadPath = null;
 String basePath = "/root/img";   //基础文件上传路径
 String inspection = "/inspection";  //巡检文件夹路径
 String maintenance = "/maintenance";  //维保文件夹路径

 switch (upload_type){
  case "1":
  uploadPath = new File(basePath+inspection);
  break;
  case "2":
  uploadPath = new File(basePath+maintenance);
  break;
  default:
  uploadPath = new File(basePath);
 }
 //判断服务器上传文件夹是否存在
 if(!uploadPath.exists()){
  uploadPath.mkdirs();
 }
 //判断上传的文件是否为空
 if (file!=null) {
  //获取上传文件后缀
  String houzhui = file.getOriginalFilename().split("\\.")[1];
  //拼接上传文件保存路径(当前用户id+设备id+时间戳.后缀名)
  File fil = new File(uploadPath+"/"+user_id+equi_id+new Date().getTime()+"."+houzhui);
  try {
  //将上传文件保存到服务器上传文件夹目录下
  out = new BufferedOutputStream(new FileOutputStream(fil));
  out.write(file.getBytes());
  out.flush();
  out.close();
  //返回上传文件的访问路径 getAbsolutePath()返回文件上传的绝对路径
  returnData.put("message",fil.getName());
  } catch (FileNotFoundException e) {
  e.printStackTrace();
  returnData.put("message", "文件上传失败:" + e.getMessage());
  } catch (IOException e) {
  e.printStackTrace();
  returnData.put("message", "文件上传失败:" + e.getMessage());
  }finally {
  //关闭处理流
  if(out!=null){out.close();}
  }
 } else {
  returnData.put("message", "文件上传失败,文件为空");
 }
 return CommonUtil.successJson(returnData);
 }

 //多文件上传
 @PostMapping("/batchUpload")
 public JSONObject handleFileUpload(HttpServletRequest request) throws Exception{
 //定义返回客户端json对象
 JSONObject returnData = new JSONObject();
 //定义处理流对象,处理文件上传
 BufferedOutputStream stream = null;
 //定义map存储返回结果集
 Map<String,String> returnfileMap = new HashMap<String, String>();

 //获取前端上传的文件列表
 List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file");
 MultipartFile file = null;

 //将request对象转成JSONObject对象
 JSONObject jsonObject = CommonUtil.request2Json(request);
 //验证必填字段,用户id,设备id,上传文件类型
 CommonUtil.hasAllRequired(jsonObject,"user_id,equi_id,upload_type");

 //获取当前用户id
 String user_id = jsonObject.getString("user_id");
 //获取当前设备id
 String equi_id = jsonObject.getString("equi_id");
 //获取上传文件的类型 1:巡检 2:维保
 String upload_type = jsonObject.getString("upload_type");

 //判断上传文件类型并设置前置路径
 File uploadPath = null;
 String basePath = "/root/img"; //基础文件上传路径
 String inspection = "/inspection"; //巡检文件夹路径
 String maintenance = "/maintenance"; //维保文件夹路径

 switch (upload_type){
  case "1":
  uploadPath = new File(basePath+inspection);
  break;
  case "2":
  uploadPath = new File(basePath+maintenance);
  break;
  default:
  uploadPath = new File(basePath);
 }
 //判断服务器上传文件夹是否存在
 if(!uploadPath.exists()){
  uploadPath.mkdirs();
 }

 //遍历客户端上传文件列表
 for (int i = 0; i < files.size(); ++i) {
  //获取到每个文件
  file = files.get(i);
  try {
   //获取上传文件后缀
   String houzhui = file.getOriginalFilename().split("\\.")[1];
   //拼接上传文件保存在服务器的路径(当前用户id+设备id+时间戳.后缀名)
   File fil = new File(uploadPath+"/"+user_id+equi_id+new Date().getTime()+"."+houzhui);
   //将上传文件保存到服务器上传文件夹目录下
   byte[] bytes = file.getBytes();
   stream = new BufferedOutputStream(new FileOutputStream(fil));
   stream.write(bytes);
   stream.close();
   //每成功上传一个文件,将上传文件名作为key,服务器保存路径作为value存入returnfileMap中
   switch (upload_type){
   case "1":
    returnfileMap.put(file.getOriginalFilename(),inspection+"/"+fil.getName());
    break;
   case "2":
    returnfileMap.put(file.getOriginalFilename(),maintenance+"/"+fil.getName());
    break;
   }
  } catch (Exception e) {
   stream = null;
   //保存上传失败的文件信息,将上传文件名作为key,value值为"fail",存入returnfileMap中
   returnfileMap.put(file.getOriginalFilename(),"fail");
  }finally {
   //关闭处理流
   if(stream!=null){stream.close();}
  }
 }
 //返回returnfileMap集合到客户端
 returnData.put("message",returnfileMap);
 return CommonUtil.successJson(returnData);
 }
 }