SpringMVC单文件文件上传

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web.xml配置文件的内容

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <display-name>springmvc_upload</display-name>  <welcome-file-list>    <welcome-file>/WEB-INF/page/index.jsp</welcome-file>  </welcome-file-list>  <servlet>    <servlet-name>upload</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>    <init-param>        <param-name>contextConfigLocation</param-name>        <param-value>WEB-INF/applicationContext.xml</param-value>    </init-param>    <!-- 启动服务器时加载 -->    <load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>    <servlet-name>upload</servlet-name>    <url-pattern>*.upload</url-pattern>  </servlet-mapping></web-app>

applicationContext.xml文件配置内容

<?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:p="http://www.springframework.org/schema/p"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">    <mvc:annotation-driven />    <context:annotation-config />    <context:component-scan base-package="com.meng.upload"/>    <bean name="multipartResolver" p:defaultEncoding="utf-8" p:maxUploadSize="10485760"        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">    </bean>    <!-- 前缀设置为WEB-INF下的page文件夹下的任何文件，后缀为.jsp的文件 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix">            <value>/WEB-INF/page/</value>        </property>        <property name="suffix">            <value>.jsp</value>        </property>    </bean></beans>

index.jsp上传图片页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html>  <head>    <title>My JSP 'index.jsp' starting page</title>  </head>  <body>      <!-- enctype上传类型是multipart/form-data -->    <form action="upload.upload" method="post" enctype="multipart/form-data">        file::<input type="file" name="file1" accept=".jpg,.png" />        <input type="submit" />    </form>  </body></html>

upload上传文件

package com.meng.upload;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import javax.servlet.http.HttpServletRequest;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.multipart.MultipartFile;@Controllerpublic class upload {    @RequestMapping(value="/upload",method=RequestMethod.POST)    public String upload(@RequestParam("file1") MultipartFile file1, HttpServletRequest request) {        //上传的文件是file1        try {        //获得upload上的全路径 文件名称为当前时间加下划线加文件名称            File file = new File(request.getServletContext().getRealPath("upload"),                    System.currentTimeMillis() + "_"                            + file1.getOriginalFilename());            System.out.println(file.getPath()+"");            FileOutputStream fileOutputStream = new FileOutputStream(file);            fileOutputStream.write(file1.getBytes());            fileOutputStream.close();        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        //成功跳ok.jsp        return "ok";    }}

下载文件

package com.meng.upload;import java.io.FileInputStream;import java.io.OutputStream;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;//下载模块@Controllerpublic class DonwloadAction {    @RequestMapping("/donwload")    public void donwload(HttpServletResponse response){        try {            //设置响应类型为multipart/form-data            response.setContentType("multipart/form-data");            //设置这个的目的是下载时文件的默认名称叫什么            response.setHeader("Content-Disposition", "attachment;filename=k1.jpg");            FileInputStream fileInputStream = new FileInputStream("F:\\QQMusicCache\\QQMusicPicture\\Maroon 5_It Won't Be Soon Before Long (International Version)_4.jpg");            //把文件大小给浏览器，让浏览器计算进度条            response.setContentLength(fileInputStream.available());            byte[] b = new byte[fileInputStream.available()];            fileInputStream.read(b);            fileInputStream.close();            OutputStream out = response.getOutputStream();            out.write(b);            out.close();        } catch (Exception e) {            e.printStackTrace();        }    }}

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