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基于servlet的文件

添加时间:2013-5-10 点击量:
 




package com.future.zfs.util;


import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@SuppressWarnings(
serial
public class FileDownLoadServlet extends HttpServlet{

@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String path
=request.getParameter(filename);
path
=new String(path.getBytes(ISO-8859-1),utf-8);
download(path,request,response);
}

@SuppressWarnings(
deprecation
public HttpServletResponse download(String path,HttpServletRequest request, HttpServletResponse response) {
try {
// path是指欲的文件的路径。
File file = new File(request.getRealPath(/)+/+path);
// 取得文件名。
String filename = file.getName();
// 取得文件的后缀名。
//String ext = filename.substring(filename.lastIndexOf(.) + 1).toUpperCase();

// 以流的情势文件。
InputStream fis = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
// 清空response
response.reset();
// 设置response的Header
response.addHeader(Content-Disposition, attachment;filename= + new String(filename.getBytes(utf-8),ISO-8859-1));
response.addHeader(
Content-Length, + file.length());
OutputStream toClient
= new BufferedOutputStream(response.getOutputStream());
response.setContentType(
application/octet-stream);
toClient.write(buffer);
toClient.flush();
toClient.close();
}
catch (IOException ex) {
ex.printStackTrace();
}
return response;
}
}





web.xml



1 <servlet>

2 <servlet-name>fileDownLoadServlet</servlet-name>
3 <servlet-class>com.future.zfs.util.FileDownLoadServlet</servlet-class>
4 </servlet>
5 <servlet-mapping>
6 <servlet-name>fileDownLoadServlet</servlet-name>
7 <url-pattern>/fileDownLoadServlet</url-pattern>
8 </servlet-mapping>
9 </servlet>



1 <a href=fileDownLoadServlet?filename=通信录.xls>哈哈,测试文件</a>


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