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struts实现文件下载

2007-07-27 12:51 267 查看

利用struts实现文件下载

fileDownload.jsp代码如下：

<%@ page language="java" pageEncoding="GB18030"%>

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html:html>

<head>

<title>fileDownload.jsp</title>

<!--

-->

</head>

<body>

<html:link page="/fileDownload.do?id=1">文件下载</html:link>

</center>

</body>

</html:html>

FileDownloadAction.java代码如下：

/**//*

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package com.iss.struts.action;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

/** *//**

* MyEclipse Struts

* Creation date: 07-27-2007

* XDoclet definition:

* @struts.action validate="true"

public class FileDownloadAction extends Action ...{

/**//*

* Generated Methods

/** *//**

* Method execute

* @param mapping

* @param form

* @param request

* @param response

* @return ActionForward

* @throws IOException

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) throws IOException ...{

String id=request.getParameter("id");

if(id!=null&&!id.equals(""))...{

id=new String(id.getBytes("ISO-8859-1"),"GBK");

if(id.equals("1"))...{

File file=new File("E:/FileManage/doc命令.txt");

String fileName=file.getName();

InputStream is=new FileInputStream(file);

OutputStream os=response.getOutputStream();

BufferedInputStream bis = new BufferedInputStream(is);

BufferedOutputStream bos = new BufferedOutputStream(os);

fileName = java.net.URLEncoder.encode(fileName, "UTF-8");// 处理中文文件名的问题

fileName = new String(fileName.getBytes("UTF-8"), "GBK");// 处理中文文件名的问题

response.reset();

response.setCharacterEncoding("UTF-8");

response.setContentType("application/x-msdownload");// 不同类型的文件对应不同的MIME类型

response.setHeader("Content-Disposition", "attachment; filename="+fileName);

int bytesRead = 0;

byte[] buffer = new byte[1024];

while ((bytesRead = bis.read(buffer)) != -1) ...{

bos.write(buffer, 0, bytesRead);// 将文件发送到客户端

}

bos.flush();

bis.close();

bos.close();

is.close();

os.close();

}

return null;

}

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标签： struts import html stylesheet buffer string

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