本文例項為大家分享了springboot實現單檔案/多檔案上傳的具體程式碼，供大家參考，具體內容如下

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 {
 //設定上傳資料夾
 File uploadPath = null;

 //單檔案上傳
 @PostMapping("/upload")
 public JSONObject upload(@RequestParam(value = "file",required = false)MultipartFile file,HttpServletRequest request) throws Exception{
  //定義返回客戶端json物件
  JSONObject returnData = new JSONObject();
  //定義處理流物件
  BufferedOutputStream out = null;

  //將request物件轉成JSONObject物件
  JSONObject jsonObject = CommonUtil.request2Json(request);
  //驗證必填欄位
  CommonUtil.hasAllRequired(jsonObject,"user_id,equi_id,upload_type");

  //獲取當前使用者id
  String user_id = jsonObject.getString("user_id");
  //獲取當前裝置id
  String equi_id = jsonObject.getString("equi_id");
  //獲取上傳檔案的型別 1:巡檢 2:維保
  String upload_type = jsonObject.getString("upload_type");

  //判斷上傳檔案型別並設定前置路徑
  File uploadPath = null;
  String basePath = "/root/img";     //基礎檔案上傳路徑
  String inspection = "/inspection";    //巡檢資料夾路徑
  String maintenance = "/maintenance";   //維保資料夾路徑

  switch (upload_type){
   case "1":
    uploadPath = new File(basePath+inspection);
    break;
   case "2":
    uploadPath = new File(basePath+maintenance);
    break;
   default:
    uploadPath = new File(basePath);
  }
  //判斷伺服器上傳資料夾是否存在
  if(!uploadPath.exists()){
   uploadPath.mkdirs();
  }
  //判斷上傳的檔案是否為空
  if (file!=null) {
   //獲取上傳檔案字尾
   String houzhui = file.getOriginalFilename().split("\\.")[1];
   //拼接上傳檔案儲存路徑(當前使用者id+裝置id+時間戳.字尾名)
   File fil = new File(uploadPath+"/"+user_id+equi_id+new Date().getTime()+"."+houzhui);
   try {
    //將上傳檔案儲存到伺服器上傳資料夾目錄下
    out = new BufferedOutputStream(new FileOutputStream(fil));
    out.write(file.getBytes());
    out.flush();
    out.close();
    //返回上傳檔案的訪問路徑 getAbsolutePath()返回檔案上傳的絕對路徑
    returnData.put("message",fil.getName());
   } catch (FileNotFoundException e) {
    e.printStackTrace();
    returnData.put("message","檔案上傳失敗:" + e.getMessage());
   } catch (IOException e) {
    e.printStackTrace();
    returnData.put("message","檔案上傳失敗:" + e.getMessage());
   }finally {
    //關閉處理流
    if(out!=null){out.close();}
   }
  } else {
   returnData.put("message","檔案上傳失敗,檔案為空");
  }
  return CommonUtil.successJson(returnData);
 }

 //多檔案上傳
 @PostMapping("/batchUpload")
 public JSONObject handleFileUpload(HttpServletRequest request) throws Exception{
  //定義返回客戶端json物件
  JSONObject returnData = new JSONObject();
  //定義處理流物件,處理檔案上傳
  BufferedOutputStream stream = null;
  //定義map儲存返回結果集
  Map<String,String> returnfileMap = new HashMap<String,String>();

  //獲取前端上傳的檔案列表
  List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file");
  MultipartFile file = null;

  //將request物件轉成JSONObject物件
  JSONObject jsonObject = CommonUtil.request2Json(request);
  //驗證必填欄位,使用者id,裝置id,上傳檔案型別
  CommonUtil.hasAllRequired(jsonObject,upload_type");

  //獲取當前使用者id
  String user_id = jsonObject.getString("user_id");
  //獲取當前裝置id
  String equi_id = jsonObject.getString("equi_id");
  //獲取上傳檔案的型別 1:巡檢 2:維保
  String upload_type = jsonObject.getString("upload_type");

  //判斷上傳檔案型別並設定前置路徑
  File uploadPath = null;
  String basePath = "/root/img"; //基礎檔案上傳路徑
  String inspection = "/inspection"; //巡檢資料夾路徑
  String maintenance = "/maintenance"; //維保資料夾路徑

  switch (upload_type){
   case "1":
    uploadPath = new File(basePath+inspection);
    break;
   case "2":
    uploadPath = new File(basePath+maintenance);
    break;
   default:
    uploadPath = new File(basePath);
  }
  //判斷伺服器上傳資料夾是否存在
  if(!uploadPath.exists()){
   uploadPath.mkdirs();
  }

  //遍歷客戶端上傳檔案列表
  for (int i = 0; i < files.size(); ++i) {
   //獲取到每個檔案
   file = files.get(i);
    try {
     //獲取上傳檔案字尾
     String houzhui = file.getOriginalFilename().split("\\.")[1];
     //拼接上傳檔案儲存在伺服器的路徑(當前使用者id+裝置id+時間戳.字尾名)
     File fil = new File(uploadPath+"/"+user_id+equi_id+new Date().getTime()+"."+houzhui);
     //將上傳檔案儲存到伺服器上傳資料夾目錄下
     byte[] bytes = file.getBytes();
     stream = new BufferedOutputStream(new FileOutputStream(fil));
     stream.write(bytes);
     stream.close();
     //每成功上傳一個檔案,將上傳檔名作為key,伺服器儲存路徑作為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;
     //儲存上傳失敗的檔案資訊,value值為"fail",存入returnfileMap中
     returnfileMap.put(file.getOriginalFilename(),"fail");
    }finally {
     //關閉處理流
     if(stream!=null){stream.close();}
    }
  }
  //返回returnfileMap集合到客戶端
  returnData.put("message",returnfileMap);
  return CommonUtil.successJson(returnData);
  }
 }

單檔案檔案結果

多檔案上傳結果

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。