1 <mime-mapping>2          <extension>apk</extension>3          <mime-type>application/vnd.android.package-archive</mime-type>4 </mime-mapping>

 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      6 <struts> 7        <package name="download" namespace="/" extends="struts-default"> 8            <action name="apk" class="downloadAction"> 9                <result type="stream">10                    <!-- contentType 指定下载文件的文件类型 —— application/octet-stream 表示无限制   -->11                    <param name="contentType">application/vnd.android.package-archive</param>12                    <!-- inputName 流对象名 —— 这里写inputStream，它就会自动去找Action中的getInputStream方法 -->13                    <param name="inputName">inputStream</param>14                    <!-- contentDisposition 使用经过转码的文件名作为下载文件名"，将调用该Action中的getFileName方法 -->15                    <param name="contentDisposition">attachment;filename="${fileName}"</param>16                    <!-- bufferSize 下载文件的缓冲大小  -->17                    <param name="bufferSize">4096</param>18                </result>19            </action>20        </package>         21 </struts>

 1 package com.chu.web.action.info; 2  3 import java.io.InputStream; 4 import java.net.URLEncoder; 5  6 import org.apache.struts2.ServletActionContext; 7 import org.springframework.context.annotation.Scope; 8 import org.springframework.stereotype.Controller; 9 10 @Controller @Scope("prototype")11 public class DownloadAction {12     private String fileName;13      14     public void setFileName(String fileName) {15         this.fileName = fileName;16     }17     public String getFileName() {18         /*String fileName = null;19         try {20             //解决中文文件名乱码问题21             fileName = URLEncoder.encode("文件下载.apk", "UTF-8");22         } catch (UnsupportedEncodingException e) {23             // TODO Auto-generated catch block24             e.printStackTrace();25         }26         return fileName;*/27         return URLEncoder.encode(fileName", "UTF-8");//解决中文文件名乱码问题28      }29 30     public InputStream getInputStream() {31         return ServletActionContext.getServletContext().getResourceAsStream("/WEB-INF/download/xxxxx.apk");32     }33     public String execute(){34         return "success";35     }36 }