struts2
/WEB-INF/web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>blk</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>
/WEB-INF/classes/struts.xml
<default-action-ref name="download"/>
<global-results>
<result name="sql">/exceptionHandle/exception.jsp</result>
<result name="root">/exceptionHandle/exception.jsp</result>
</global-results> <global-exception-mappings>
<exception-mapping exception="java.sql.SQLException" result="sql"/>
<exception-mapping exception="java.lang.Exception" result="root"/>
</global-exception-mappings> <action name="download" class="down.FileDownloadAction">
<param name="inputPath">\down\images\文件.zip</param>
<result name="success" type="stream">
<param name="contentType">application/zip</param>
<param name="inputName">targetFile</param>
<param name="contentDisposition">filename="文件.zip"</param>
<param name="bufferSize">4096</param>
</result>
</action>
/down/strutsDown.html
<html>
<head>
<title>Struts2的文件下载</title>
</head> <body>
<h1>Struts2的文件下载</h1>
下载Struts2的Logo：<a href="download.action">下载文件</a> </body>
</html>
down.FileDownloadAction
package down; import java.io.InputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.Action; public class FileDownloadAction implements Action
{ private String inputPath;
public void setInputPath(String value)
{
inputPath = value;
} /*
下载用的Action应该返回一个InputStream实例，
该方法对应在result里的inputName属性值为targetFile
*/
public InputStream getTargetFile() throws Exception
{
return ServletActionContext.getServletContext().getResourceAsStream(inputPath);
} public String execute() throws Exception
{
return SUCCESS;
} }