jsp下载文件

download.jsp web工程中下载xls文件

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>


<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
request. setCharacterEncoding("UTF-8");
//response.setHeader("Content-Type", "charset=UTF-8");
%>

<%

    out.clear();
    out = pageContext.pushBody();
    response.setContentType("application/x-msdownload");
    response.addHeader("Content-Disposition","attachment;fileName=a.xls");
    OutputStream os = response.getOutputStream(); 
    FileInputStream fis = new FileInputStream("b.xls");//default path"/home/ap/user/domins/user" 
    try{
        byte[] b = new byte[1024]; 
        int m = 0;
        while ( (m = fis.read(b)) > 0 ){ 
            os.write(b, 0, m); //写文件
        } 
        fis.close(); 
        os.flush(); 
        os.close(); 
    }
    catch(Exception e){
        fis.close();
        os.flush();
        os.close();
    }
    
%>