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