struts2下载

java代码

 1 package com.web.action;
 2 
 3 import java.io.InputStream;
 4 import java.io.UnsupportedEncodingException;
 5 import org.apache.struts2.ServletActionContext;
 6 
 7 import com.opensymphony.xwork2.ActionSupport;
 8 
 9 public class FileDownload2Action extends ActionSupport{
10     private String fileName;
11 
12     public String getFileName() {
13         return fileName;
14     }
15 
16     public void setFileName(String fileName) {
17         this.fileName = fileName;
18     }
19     public InputStream getInputStream(){
20         //文件路径
21         String url="/downdir/Linux常用命令全集.CHM";
22         try {
23             //下载文件名
24             fileName=new String("Linux常用命令全集.CHM".getBytes("GBK"),"ISO8859_1");
25         } catch (UnsupportedEncodingException e) {
26             // TODO Auto-generated catch block
27             e.printStackTrace();
28         }
29         return ServletActionContext.getServletContext().getResourceAsStream(url);
30     }
31 
32     @Override
33     public String execute() throws Exception {
34         return "success";
35     }
36 }

struts.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5 <struts>
 6     <constant name="struts.i18n.encoding" value="GBK"></constant>
 7     <!-- 返回的结果是流   inputname的参数是action里面的一个get+方法名
 8      -->
 9     <package name="default" extends="struts-default">
10         <action name="fileDownload2" class="com.web.action.FileDownload2Action">
11             <result type="stream">
12                 <param name="inputName">inputStream</param>
13                 <param name="contentDisposition">filename=${fileName}</param>
14             </result>
15         </action>
16     </package>
17 </struts>

注意：struts2下载前端页面必须是a标签