jsp实现从服务器下载xls文件到客户端的方法

2024-09-05 00:22:24

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这篇文章主要介绍了jsp实现从服务器下载xls文件到客户端的方法,以完整实例形式较为详细的分析了jsp文件下载的相关实现技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了jsp实现从服务器下载xls文件到客户端的方法。分享给大家供大家参考，具体如下：

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>

<%@ 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 filefilename = 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>