SpringMVC之单/多文件上传

1.准备jar包（图标所指必备包，其他按情况导入）

2.项目结构

3.SingleController.java（控制器代码单文件和多文件）

 package com.wt.uplaod;

 import java.io.File;
 import java.io.IOException;

 import javax.servlet.http.HttpSession;

 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.multipart.MultipartFile;

 @Controller
 public class SingleController {
     //单文件上传
     @RequestMapping(value="/upload.html")
     public String upload(@RequestParam("uploadFile")MultipartFile file,HttpSession session) throws IllegalStateException, IOException{
         //上传文件存储的路径
 //        String filePath=session.getServletContext().getRealPath("upload");
 //        System.out.println("存储路径"+filePath);
         if(!file.isEmpty()){
             //上传文件的全路径
             File tempFile=new File("C:/pic"+"/"+file.getOriginalFilename());
             System.out.println("全路径："+tempFile);
             //文件上传
             file.transferTo(tempFile);
         }
         return "success";
     } 

     //多文件上传
     @RequestMapping(value="/upload.html")
     public String upload(@RequestParam("uploadFile")MultipartFile[] files,HttpSession session) throws IllegalStateException, IOException{
         //上传文件存储的路径
 //        String filePath=session.getServletContext().getRealPath("upload");
 //        System.out.println("存储路径"+filePath);
         for(MultipartFile file:files){
         if(!file.isEmpty()){
             //上传文件的全路径
             File tempFile=new File("C:/pic"+"/"+file.getOriginalFilename());
             System.out.println("全路径："+tempFile);
             //文件上传
             file.transferTo(tempFile);
         }
         }
         return "success";
     } 

     @RequestMapping("/toFormPage.html")
     public String toFormPage(){
         return "form";
     }
 }

4.springmvc-servlet.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:mvc="http://www.springframework.org/schema/mvc"
     xmlns:p="http://www.springframework.org/schema/p"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="
         http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/mvc
         http://www.springframework.org/schema/mvc/spring-mvc.xsd">

   <context:component-scan base-package="com.wt.uplaod"></context:component-scan>
   <mvc:annotation-driven></mvc:annotation-driven>

     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
         <!-- 指定编码格式 -->
         <property name="defaultEncoding" value="utf-8"></property>
         <!-- 上传文件的最大值 -->
         <property name="maxUploadSize" value="10000000"></property>
         <!-- 上传文件临时保存的位置 -->
         <property name="uploadTempDir" value="tempDir"></property>
     </bean>        

     <!-- 视图解析器。prefix：前缀， suffix：后缀 -->
     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
         <property name="prefix" value="/WEB-INF/jsp/"/>
         <property name="suffix" value=".jsp"/>
     </bean>

 </beans>

5.web.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
   <display-name>SpringMVC</display-name>
   <servlet>
     <servlet-name>article6</servlet-name>
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     <init-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>classpath:springmvc-servlet.xml</param-value>
     </init-param>
   </servlet>
   <servlet-mapping>
     <servlet-name>article6</servlet-name>
     <url-pattern>/url/*</url-pattern>
   </servlet-mapping>
 </web-app>

6.form.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <title>Insert title here</title>
 </head>
 <body>
 <form action="upload.html" method="post" enctype="multipart/form-data">
 <input type="file" name="uploadFile"><br/>
 <input type="file" name="uploadFile"><br/>
 <input type="file" name="uploadFile"><br/>
 <input type="submit" value="上  传">
 </form>
 </body>
 </html>

7.success.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <title>Insert title here</title>
 </head>
 <body>
 上传成功
 </body>
 </html>

8.测试访问（单文件上传留一个input就行）

9.注意

如果存储路径为Tomcat的安装路径，那么每次改动form.jsp会自动删除存储的文件夹，可以在控制器中修改存储路径为其他的。