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。