struts2——文件下载（简单的功能）

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <%@taglib uri="/struts-tags" prefix="s"%>

 <!DOCTYPE html>

 <html>

     <head>

         <meta charset="UTF-8">

         <title>struts2的一个例子</title>

     </head>

     <body>

         <s:form action="downloadFile.action" method="post" enctype="multipart/form-data">

             <s:submit value="下载文件"/>

         </s:form>

     </body>

 </html>

index.jsp代码

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

 <!DOCTYPE struts PUBLIC

     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>

     <constant name="struts.devMode" value="true"/>

     <package name="hello" extends="struts-default" namespace="/">

         <action name="downloadFile" class="com.xiaostudy.web.DownloadFile" method="downloadFile">

             <result name="success" type="stream">

                 <param name="inputName">fileInputStream</param>

                 <param name="contentDisposition">attachment;filename=image.jpg</param>

                 <param name="contentType">application/octet-stream</param>

             </result>

         </action>

     </package>

 </struts>

struts.xml代码

 package com.xiaostudy.web;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.InputStream;

 import org.apache.struts2.ServletActionContext;

 import com.opensymphony.xwork2.ActionSupport;

 public class DownloadFile extends ActionSupport {

     public InputStream fileInputStream;

     public String downloadFile() throws FileNotFoundException {

         String path = ServletActionContext.getServletContext().getRealPath("/WEB-INF/files/CSS.jpg");

         fileInputStream = new FileInputStream(new File(path));

         return SUCCESS;

     }

     public InputStream getFileInputStream() {

         return fileInputStream;

     }

     public void setFileInputStream(InputStream fileInputStream) {

         this.fileInputStream = fileInputStream;

     }

 }

action动作类DownloadFile

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struts2——文件下载（简单的功能）

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