jsp实现从服务器下载xls文件到客户端的方法

2020-07-27 21:29:56

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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>

希望本文所述对大家JSP程序设计有所帮助。

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