Struts2实现特定文件下载

对WebContent中download目录下的city.xml文件进行下载

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>文件下载</title>
</head>
<body>
	<s:a action="download.action">Click here to download</s:a>
</body>
</html>


 

package com.struts2.action;

import java.io.InputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class DownloadAction extends ActionSupport {

	private static final long serialVersionUID = 1L;

	/** 文件名 */
	private String fileName;

	public String getFileName() {
		return fileName;
	}

	public void setFileName(String fileName) {
		this.fileName = fileName;
	}

	public InputStream getInputStream() throws Exception {

		this.fileName = "city.xml";

		return ServletActionContext.getServletContext().getResourceAsStream(
				"/download/" + fileName);
	}

	@Override
	public String execute() throws Exception {
		return SUCCESS;
	}

}


配置struts.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
	<constant name="struts.i18n.encoding" value="UTF-8" />
	<package name="struts2" extends="struts-default">

		<!-- 文件下载 -->
		<action name="download" class="com.struts2.action.DownloadAction">
			<result name="success" type="stream">
				<param name="inputName">inputStream</param>
				<param name="contentDisposition">attachment;filename="${fileName}"</param>
			</result>
		</action>	
	</package>
</struts>


 

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