在实际的企业开发中，文件上传是最常见的功能之一，SpringBoot集成了SpringMVC常用的功能，当然也包含了文

件上传的功能，实现起来没有太多的区别。

下面我们来讲解一下，使用SpringBoot如何实现多个文件上传操作。使用的环境是IntelliJ IDE开发工具。

开发过程如下：

1.1 配置pom.xml文件

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0

https://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

org.springframework.boot

spring-boot-starter-parent

2.0.3.RELEASE

com.qianfeng.springboot

fileupload

0.0.1-SNAPSHOT

fileupload

Demo project for Spring Boot

1.8

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-thymeleaf

org.springframework.boot

spring-boot-starter-test

test

1.2 application.properties

1.3 Controller类

org.springframework.boot

spring-boot-maven-plugin

server.port=8080

package com.qianfeng.springboot.fileupload.controller;

import org.springframework.stereotype.Controller;

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

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

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

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

import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

import java.io.File;

import java.io.IOException;

@Controller

public class UploadFileController {

@RequestMapping("/uploadfile")

public String uploadOneFile(){

return "uploadonefile"; // 最终由ThymeleafView处理，转发 classpath:templates

}

@RequestMapping("/uploadfiles")

public String uploadMultiFile(){

return "uploadmultifile"; // 最终由ThymeleafView处理，转发 classpath:templates

}

/**

* 上传单个文件

* @param file

* @param request

* @return

*/

@RequestMapping(value = "/uploadsimplefile", method = RequestMethod.POST)

@ResponseBody

public String uploadSimpleFile(@RequestParam("attachment") MultipartFile file,

HttpServletRequest request) {

try {

String fileDir =

request.getSession().getServletContext().getRealPath("/upload/");

System.out.println("------->>"+fileDir);

File dir = new File(fileDir);

if (!dir.exists()) {

dir.mkdirs();

}

String fileName = file.getOriginalFilename();

File upload_file = new File(fileDir + fileName);

file.transferTo(upload_file);

} catch (Exception e) {

e.printStackTrace();

return "上传失败";

}

return "上传成功";

}

/**

* 上传多个文件

* @param file

* @param request

* @return

*/

@RequestMapping(value = "/uploadmultifile", method = RequestMethod.POST)

@ResponseBody

public String uploadMultiFile(@RequestParam("attachment") MultipartFile[] file,

HttpServletRequest request) {

try {

String fileDir =

request.getSession().getServletContext().getRealPath("/upload/");

System.out.println("------->>"+fileDir);

File dir = new File(fileDir);

if (!dir.exists()) {

dir.mkdirs();

}

for (int i=0;i

if (file[i]!=null){

uploadFile(fileDir,file[i]);

}

}

} catch (Exception e) {

e.printStackTrace();

return "上传失败";

}

return "上传成功";

}

1.4 单个文件上传的页面

/**

*

* @param uploadDir

* @param file

* @throws IOException

*/

public void uploadFile(String uploadDir,MultipartFile file) throws IOException{

String file_name = file.getOriginalFilename();

File upload_file = new File(uploadDir+file_name);

file.transferTo(upload_file);

}

}

文件上传文件上传