SpringBoot实现文件上传
开发准备:
1.快速搭建一个springboot项目
2.准备上传页面 提供form表单 post提交 multipart/form-data
3.开发控制器 使用MultipartFile形式接收接收的变量名必须和上传页面的name一至 将接收到的文件放入到执行目录中即可
pom.xml文件引入的依赖:
<parent> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-parentartifactId> <version>2.3.0.RELEASEversion> <relativePath/> parent> <dependencies> <dependency> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-webartifactId> dependency> <dependency> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-testartifactId> <scope>testscope> <exclusions> <exclusion> <groupId>org.junit.vintagegroupId> <artifactId>junit-vintage-engineartifactId> exclusion> exclusions> dependency> <dependency> <groupId>org.springframework.bootgroupId> <artifactId>spring-boot-starter-tomcatartifactId> dependency> <dependency> <groupId>org.apache.tomcat.embedgroupId> <artifactId>tomcat-embed-jasperartifactId> dependency> <dependency> <groupId>commons-fileuploadgroupId> <artifactId>commons-fileuploadartifactId> <version>1.3.2version> dependency> dependencies>jsp页面代码:
1 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 2 <html> 3 <head> 4 <title>文件上传页面title> 5 head> 6 <body> 7 <center> 8 <form action="${pageContext.request.contextPath}/fc/upload" method="post" enctype="multipart/form-data"> 9 <input type="file" name="aaa"> 10 <input type="submit" value="上传"> 11 form> 12 center> 13 body> 14 html>
Controller代码
1 package com.liusha.ems.controller; 2 3 import org.apache.commons.io.FilenameUtils; 4 import org.springframework.stereotype.Controller; 5 import org.springframework.web.bind.annotation.RequestMapping; 6 import org.springframework.web.multipart.MultipartFile; 7 8 import javax.servlet.http.HttpServletRequest; 9 import java.io.File; 10 import java.io.IOException; 11 import java.text.SimpleDateFormat; 12 import java.util.Date; 13 import java.util.UUID; 14 15 @Controller 16 @RequestMapping("/fc") 17 public class FileController { 18 19 @RequestMapping("/getFile") 20 public String getFile(){ 21 return "/upload"; 22 } 23 24 //处理文件上传的方法 25 @RequestMapping("/upload") 26 public String upload(MultipartFile aaa, HttpServletRequest request) throws IOException { 27 28 //根据相对获取绝对路径(文件上传到的保存位置) 29 String realPath = request.getSession().getServletContext().getRealPath("/WEB-INF/files"); 30 //获取文件后缀 31 String extension = FilenameUtils.getExtension(aaa.getOriginalFilename()); 32 //文件名我这里使用UUID和时间组成的 33 String newFileNamePrefix= UUID.randomUUID().toString().replace("-","")+ 34 new SimpleDateFormat("yyyyMMddHHssSSS").format(new Date()); 35 String newFileName=newFileNamePrefix+"."+extension; 36 //处理文件上传 37 aaa.transferTo(new File(realPath,newFileName)); 38 39 //上传成功后跳转到的路径 40 return "redirect:/fc/getFile"; 41 } 42 43 }