struts2实现文件的上传和下载

浏览数：22 / 时间：2015年06月09日

文件的上传和下载需要两个jar包 commons-fileupload-1.2.2.jar和commons-io-2.0.1.jar

JSP页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>EYang</title>

<script type="text/javascript" src="js/jquery-1.8.0.min.js"></script>
<script type="text/javascript">
	$(function() {
		
	});
</script>
</head>
<body>
	<form action="file/fileUp.action" method="post" enctype="multipart/form-data">
		<input type="file" name="file">
		<input type="submit" value="上传">
	</form>
        <form action="file/fileLoad.action" method="post">
		<input type="submit" value="下载">
	</form>
</body>
</html>

struts.xml配置

<?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>

	<!-- value为false时、关闭动态方法调用 <constant name="struts.enable.DynamicMethodInvocation" 
		value="false" /> 开发模式 <constant name="struts.devMode" value="false" /> <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> </package> 可以添加外部的xml文件 
		<include file="example.xml"/> -->
	<!-- Add packages here -->
	<constant name="struts.multipart.saveDir" value="/tmp" />
	<!-- 指定国际化资源文件的baseName为uploadFile -->
	<constant name="struts.custom.i18n.resources" value="uploadFile"></constant>
	<!-- 设置该应用使用的编码集为utf-8 -->
	<constant name="struts.i18n.encoding" value="utf-8"></constant>
	<package name="eyang" namespace="/file" extends="struts-default">

		<!-- 全局拦截器配置 <interceptors> <interceptor name="loginInterceptor" class="com.eyang.interceptor.LoginInterceptor"></interceptor> 
			<interceptor-stack name="myInterceptor"> <interceptor-ref name="defaultStack"></interceptor-ref> 
			<interceptor-ref name="loginInterceptor"></interceptor-ref> </interceptor-stack> 
			</interceptors> <default-interceptor-ref name="myInterceptor"></default-interceptor-ref> -->

		<!-- <interceptors> <interceptor name="loginInterceptor" class="com.eyang.interceptor.LoginInterceptor"></interceptor> 
			<interceptor name="SessionInterceptor" class="com.eyang.interceptor.SessionInterceptor"></interceptor> 
			</interceptors> <action name="login" class="com.eyang.action.LoginAction" 
			method="login"> <result >/success.jsp</result> 单个action需要执行的拦截器 <interceptor-ref 
			name="SessionInterceptor"></interceptor-ref> <interceptor-ref name="loginInterceptor"></interceptor-ref> 
			<interceptor-ref name="defaultStack"></interceptor-ref> </action> -->

		<action name="fileUp" class="com.eyang.action.FileUpAction" method="fileUp">
			<result>/fileList.jsp</result>
		</action>

		<action name="fileLoad" class="com.eyang.action.FileLoadAction" method="fileLoad">

			<!-- 配置结果类型为stream的结果 -->
			<result name="success" type="stream">
				<!-- 指定下载文件的类型 -->
				<param name="contentType">image/jpg</param>
				<!-- 指定下载文件的方法名 -->
				<param name="inputName">downloadFile</param>
				<param name="contentDisposition">attachement;filename="struts.jpg"</param>

				<!-- 指定下载文件的缓冲大小 -->
				<param name="bufferSize">50000000</param>
			</result>
		</action>
	</package>

</struts>

文件上传Action

package com.eyang.action;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class FileUpAction extends ActionSupport {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private File file;

	/**
	 * @return String
	 * @throws IOException
	 */
	public String fileUp() throws IOException {
		String realpath = ServletActionContext.getServletContext().getRealPath("/file");
		// D:\Office\eclipse-jee-kepler-SR2-win32\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\EYang_Template\file
		System.out.println("realpath: " + realpath);
		if (file != null) {
			File savefile = new File(new File(realpath), "001.jpg");
			if (!savefile.getParentFile().exists())
				savefile.getParentFile().mkdirs();
			FileUtils.copyFile(file, savefile);
		}
		return SUCCESS;
	}

	public File getFile() {
		return file;
	}

	public void setFile(File file) {
		this.file = file;
	}
}

文件下载Action

package com.eyang.action;

import java.io.InputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class FileLoadAction extends ActionSupport {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	public String fileLoad() {
		return SUCCESS;
	}
	
	public InputStream getDownloadFile() throws Exception {
		InputStream in = ServletActionContext.getServletContext().getResourceAsStream("/img/qianyesong.jpg");
		return in;
	}
}

郑重声明：本站内容如果来自互联网及其他传播媒体，其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享，并不代表本站赞同其观点和对其真实性负责，也不构成任何其他建议。

struts2实现文件的上传和下载