springmvc上传下载功能 参照网上代码写了一个简单的例子
1、需要导入jar包:ant.jar、commons-fileupload.jar、connom-io.jar。当然spring jar包不可缺少的哦 我这里用的是spring+springmvc+hibernate 可以到官网上直接下载springmvcjar即可
2、springmvc.xml配置
3、web.xml配置
- <?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:context="http://www.springframework.org/schema/context"
- xmlns:mvc="http://www.springframework.org/schema/mvc"
- 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-3.2.xsd
- http://www.springframework.org/schema/mvc
- http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
- <!-- 扫描包 -->
- <context:component-scan base-package="com.ai.customer" />
- <!-- 启动注解 -->
- <mvc:annotation-driven />
- <!-- 文件上传 -->
- <bean id="multipartResolver"
- class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
- <!-- 设置上传文件的最大尺寸为10MB -->
- <property name="maxUploadSize">
- <value>10000000</value>
- </property>
- </bean>
- <!-- 静态文件访问 -->
- <mvc:default-servlet-handler/>
- <!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 -->
- <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
- <property name="prefix" value="/"/>
- <property name="suffix" value=".jsp"/>
- </bean>
- </beans>
4、程序代码块
- <servlet>
- <servlet-name>spring</servlet-name>
- <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
- <init-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>classpath*:config/spring/spring-*.xml</param-value>
- </init-param>
- <load-on-startup>1</load-on-startup>
- </servlet>
- <servlet-mapping>
- <servlet-name>spring</servlet-name>
- <url-pattern>*.do</url-pattern>
- </servlet-mapping>
- <filter>
- <filter-name>codeUTF-8</filter-name>
- <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
- <init-param>
- <param-name>encoding</param-name>
- <param-value>UTF-8</param-value>
- </init-param>
- <init-param>
- <param-name>forceEncoding</param-name>
- <param-value>true</param-value>
- </init-param>
- </filter>
- <filter-mapping>
- <filter-name>codeUTF-8</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
5、jsp页面代码 注意:设置表单中form表单的属性为:enctype="multipart/form-data"
- package com.ai.customer.controller;
- import java.io.BufferedInputStream;
- import java.io.BufferedOutputStream;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.IOException;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.apache.commons.fileupload.FileUpload;
- import org.apache.commons.io.FileUtils;
- 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;
- import org.springframework.web.servlet.ModelAndView;
- @Controller
- public class FileUploadController {
- /*
- * SpringMVC中的文件上传
- * @第一步:由于SpringMVC使用的是commons-fileupload实现,故将其组件引入项目中
- * @这里用到的是commons-fileupload-1.2.1.jar和commons-io-1.3.2.jar
- * @第二步:spring-mvx中配置MultipartResolver处理器。可在此加入对上传文件的属性限制
- * <bean id="multipartResolver"
- * class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
- * <!-- 设置上传文件的最大尺寸为10MB -->
- * <property name="maxUploadSize">
- * <value>10000000</value>
- * </property>
- * </bean>
- * 第三步:在Controller的方法中添加MultipartFile参数。该参数用于接收表单中file组件的内容
- *第四步:编写前台表单。注意enctype="multipart/form-data"以及<input type="file" name="****"/>
- * 如果是单个文件 直接使用MultipartFile 即可
- */
- /**********************上传代码**************************/
- @RequestMapping("/upload.do")
- public ModelAndView upload(String name,
- //上传多个文件
- @RequestParam("file") MultipartFile[] file,
- HttpServletRequest request) throws IllegalStateException,
- IOException {
- //获取文件 存储位置
- String realPath = request.getSession().getServletContext()
- .getRealPath("/uploadFile");
- File pathFile = new File(realPath);
- if (!pathFile.exists()) {
- //文件夹不存 创建文件
- pathFile.mkdirs();
- }
- for (MultipartFile f : file) {
- System.out.println("文件类型:"+f.getContentType());
- System.out.println("文件名称:"+f.getOriginalFilename());
- System.out.println("文件大小:"+f.getSize());
- System.out.println(".................................................");
- //将文件copy上传到服务器
- f.transferTo(new File(realPath + "/" + f.getOriginalFilename()));
- //FileUtils.copy
- }
- //获取modelandview对象
- ModelAndView view = new ModelAndView();
- view.setViewName("redirect:index.jsp");
- return view;
- }
- /********下载代码*************/
- @RequestMapping(value = "download.do")
- public ModelAndView download(HttpServletRequest request,
- HttpServletResponse response) throws Exception {
- // String storeName = "Spring3.xAPI_zh.chm";
- String storeName="房地.txt";
- String contentType = "application/octet-stream";
- FileUploadController.download(request, response, storeName, contentType);
- return null;
- }
- //文件下载 主要方法
- public static void download(HttpServletRequest request,
- HttpServletResponse response, String storeName, String contentType
- ) throws Exception {
- request.setCharacterEncoding("UTF-8");
- BufferedInputStream bis = null;
- BufferedOutputStream bos = null;
- //获取项目根目录
- String ctxPath = request.getSession().getServletContext()
- .getRealPath("");
- //获取下载文件露肩
- String downLoadPath = ctxPath+"/uploadFile/"+ storeName;
- //获取文件的长度
- long fileLength = new File(downLoadPath).length();
- //设置文件输出类型
- response.setContentType("application/octet-stream");
- response.setHeader("Content-disposition", "attachment; filename="
- + new String(storeName.getBytes("utf-8"), "ISO8859-1"));
- //设置输出长度
- response.setHeader("Content-Length", String.valueOf(fileLength));
- //获取输入流
- bis = new BufferedInputStream(new FileInputStream(downLoadPath));
- //输出流
- bos = new BufferedOutputStream(response.getOutputStream());
- byte[] buff = new byte[2048];
- int bytesRead;
- while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
- bos.write(buff, 0, bytesRead);
- }
- //关闭流
- bis.close();
- bos.close();
- }
- }
- <%@ 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.do" method="post" enctype="multipart/form-data">
- <input type="text" name="name" />
- <br>
- <input type="file" name="file">
- <br>
- <input type="file" name="file" />
- <input type="submit" value="提交">
- </form>
- </body>
- </html>
来源: http://www.phpxs.com/code/1002271/