package com.favccxx.strutsdemo;  import java.io.File; import java.io.FileInputStream; import java.io.InputStream;  import com.opensymphony.xwork2.ActionSupport;  public class DownloadAction extends ActionSupport {       private static final long serialVersionUID = -7758584364932001138L;      private InputStream inputStream;    @Override   public String execute() throws Exception {      inputStream = new FileInputStream(new File("D://芒果豆.jpg"));      return SUCCESS;   }    public InputStream getInputStream() {     return inputStream;   }    public void setInputStream(InputStream inputStream) {     this.inputStream = inputStream;   }        } 

<?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.enable.DynamicMethodInvocation" value="false" />   <constant name="struts.devMode" value="true" />    <package name="default" namespace="/" extends="struts-default">      <default-action-ref name="index" />      <global-results>       <result name="error">/error.jsp</result>     </global-results>      <global-exception-mappings>       <exception-mapping exception="java.lang.Exception" result="error"/>     </global-exception-mappings>      <action name="index">       <result type="redirectAction">         <param name="actionName">HelloWorld</param>         <param name="namespace">/example</param>       </result>     </action>          <action name="download" class="com.favccxx.strutsdemo.DownloadAction">       <result name="success" type="stream">         <param name="contentType">application/octet-stream</param>         <param name="inputName">inputStream</param>         <param name="contentDisposition">attachment;filename="mongo.jpg"</param>         <param name="bufferSize">1024</param>       </result>     </action>   </package>  </struts> 

<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <display-name>Struts Blank</display-name>    <filter>     <filter-name>struts2</filter-name>     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>   </filter>    <filter-mapping>     <filter-name>struts2</filter-name>     <url-pattern>/*</url-pattern>   </filter-mapping>    <welcome-file-list>     <welcome-file>index.html</welcome-file>   </welcome-file-list>  </web-app> 

<a href="/download" rel="external nofollow" >無注解下載</a>