SpringBoot接收MultipartFile文件，并保存文件

package com.hrw.controller;

import com.hrw.pojo.Result;

import org.apache.tomcat.util.http.fileupload.IOUtils;

import org.springframework.web.bind.annotation.PostMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

import java.io.*;

/**

 * projectName: testSpring

 *

 * @author: xxx

 * time: 2022/7/17 16:12

 * description:

 */

@RestController

@RequestMapping("/test")

public class TestController {

    @PostMapping("/aaa")

    public Result test1(MultipartFile file111, HttpServletRequest request) {

        String fileName = file111.getOriginalFilename();

        System.out.println("完整文件名 = " + fileName);

        InputStream inputStream = null;

        FileOutputStream fileOut = null;

        try {

            inputStream = file111.getInputStream();

            fileOut = new FileOutputStream(fileName);//这里可以改路径

            IOUtils.copy(inputStream, fileOut);

            fileOut.flush();

        } catch (IOException e) {

            e.printStackTrace();

        }finally {

            try {

                if (inputStream != null) {

                    inputStream.close();

                }

                if (fileOut != null) {

                    fileOut.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        return new Result(200,"成功了");

    }

}

记得修改配置文件，不然文件超过限制可能传不了，（下面配置方式仅供参考，不同版本可能会有所不同）

server:

  port: 8018

spring:

  application:

    name: testSpring

  servlet.multipart.enabled: true

  servlet.multipart.max-file-size: 100MB

  servlet.multipart.max-request-size: 1000MB

测试的方法是在postman里面，from里放一个File类型的参数，如下图所示