jsp从服务器下载xls文件到客户端

参考网上的代码写了一个下载xls文件到客户端的jsp页面,只要将服务器的文件地址传给这个jsp页面就可以实现下载文件到客户端了。

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page import="java.io.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<link href="styles/basic.css" rel="stylesheet" type="text/css" />
		<title>download</title>
</head>
<%    
     response.setCharacterEncoding("gb2312");    
     request.setCharacterEncoding("gb2312");    
   
    if (request.getParameter("file") != null) {    
         OutputStream os = null;    
         FileInputStream fis = null;    
        try {    
             String file = request.getParameter("file");    
            if (!(new File(file)).exists()) {    
                 System.out.println("没有文件");    
                return;    
             }    
             System.out.println("文件名为:"+file);    
             os = response.getOutputStream();    
             response.setHeader("content-disposition", "attachment;filename=" + file);    
             response.setContentType("application/vnd.ms-excel");//此项内容随文件类型而异    
            byte temp[] = new byte[1000];    
             fis = new FileInputStream(file);    
            int n = 0;    
            while ((n = fis.read(temp)) != -1) {    
                 os.write(temp, 0, n);    
             }    
         } catch (Exception e) {    
             out.print("出错");    
         } finally {    
            if (os != null)    
                 os.close();    
            if (fis != null)    
                 fis.close();    
         }    
         out.clear();    
         out = pageContext.pushBody();    
   
     }    
%>    
   
<form action="" method="post">    
     <select name="file">    
         <option value="D:\Program Files\apache-tomcat-6.0.18\webapps\StarAttendance\upload/temp.xls">    
             冷山sky_snow    
         </option>    
     </select>    
     <input type="submit"/>    
</form> 
</html>
 

 

 

2.另外一个修改后的版本(下载文件名可包含中文)

<%@ page language="java" import="java.util.*,java.net.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page import="java.io.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<link href="styles/basic.css" rel="stylesheet" type="text/css" />
		<title>download</title>
</head>
<%    
    response.setCharacterEncoding("UTF-8");    
    request.setCharacterEncoding("UTF-8");    

    String filepath = new String(request.getParameter("file").getBytes("ISO-8859-1"),"UTF-8");
    System.out.println("============================"+filepath);
    if (filepath != null) {    
         OutputStream os = null;    
         FileInputStream fis = null;    
        try {    
             String file = filepath;    
            if (!(new File(file)).exists()) {    
                 System.out.println("没有文件");    
                return;    
             }    
             String filename = file.substring(file.lastIndexOf("\\")+1);
             System.out.println("文件名为:"+filename);    
             os = response.getOutputStream();    
             response.setHeader("content-disposition", "attachment;filename=" + new String(filename.getBytes("GBK"), "ISO-8859-1"));      
             response.setContentType("application/octet-stream");//八进制流 与文件类型无关  
             byte temp[] = new byte[1024];    
             fis = new FileInputStream(file);    
             int n = 0;    
             while ((n = fis.read(temp)) != -1) {    
                 os.write(temp, 0, n);    
             }    
         } catch (Exception e) {    
             out.print("出错了");    
         } finally {    
            if (os != null)    
                 os.close();    
            if (fis != null)    
                 fis.close();    
         }    
         out.clear();    
         out = pageContext.pushBody();    
   
     }    
%>    
</html>

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