SpringMVC11文件上传

时间：2021-08-22 08:04:02
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML>

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

<form action="user/login" method="post"  enctype="multipart/form-data">

  <input  type="file" name="imgs"/>

  <input  type="file" name="imgs"/>

  <input  type="file" name="imgs"/>

  <button>上传文件</button>

</form>

  </body>

</html>

index.jsp文件上传的页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'success.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

  <h1>webroot   success页面</h1>

  </body>

</html>

success.jsp成功界面

@Controller

@RequestMapping("/user")

public class MyController {

    /**

     * 单个文件上传

     * MultipartFile img :必须和表单中的name属性值一致

     * @throws Exception

     * @throws IllegalStateException 

    @RequestMapping(value = "/login")

    public String login(MultipartFile img, HttpSession session)

            throws IllegalStateException, Exception {

        System.out.println("进入了login......");

        // 获取上传的位置

        String path = session.getServletContext().getRealPath("/images");

        // 获取文件的名称

        String filename = img.getOriginalFilename();

        System.out.println(img.getOriginalFilename());

        System.out.println(img.getName()); // 表单中name的属性值

        System.out.println(img.getContentType()); // 上传文件的类型

        // 上传文件只能是图片 通过MIME类型 来判断

        if (img.getContentType().equals("image/jpeg")) {

            img.transferTo(new File(path, filename)); // 上传

        }

        return "/success.jsp";

    }*/

    /**

     * 多个文件上传

     * @RequestParam  必须使用！ 如果不加@RequestParam

     * 默认前台的每一个imgs都是一个数组！

     * 我们想要的是前台的所有上传文件 在一个数组里面！

     */

    @RequestMapping(value = "/login")

    public String login(@RequestParam MultipartFile[] imgs, HttpSession session)

            throws IllegalStateException, Exception {

        System.out.println("进入了login......");

        // 获取上传的位置

        String path = session.getServletContext().getRealPath("/images");

        // 循环获取文件的名称

        for (MultipartFile img : imgs) {

            // 判断用户是否选择文件

            if (img.getSize() > 0) {

                String filename = img.getOriginalFilename();

                img.transferTo(new File(path, filename)); // 上传

            }

        }

        return "/success.jsp";

    }

}

对应的controller代码

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:context="http://www.springframework.org/schema/context"

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

    xsi:schemaLocation="

        http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/mvc

        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<!-- 配置需要扫描的包 -->

<context:component-scan base-package="cn.bdqn"/>

<!-- 开启注解 -->

<mvc:annotation-driven/>

<!-- 配置文件上传  id必须是multipartResolver  因为已经在*调度器

中定义了

 Well-known name for the MultipartResolver object in the bean factory for this namespace. */

    public static final String MULTIPART_RESOLVER_BEAN_NAME = "multipartResolver";

 -->

<bean  id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

  <property name="defaultEncoding" value="utf-8"/><!--乱码问题  -->

  <property name="maxUploadSize" value="1048576"/><!-- 文件总大小不能超过  1M-->

 <!-- <property name="maxUploadSizePerFile" value="1048576"/>单个文件不能超过1m  -->

</bean>

</beans>

springmvc-servlet.xml文件

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