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发布时间:2016-01-01 作者:网络 阅读:198次

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.*" %>





download

<%
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();
}
%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page import="java.io.*" %>



    
    
    download

<%
   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();
   }
%>

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.*" %>






download

<%
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();
}
%>


希望本文所述对大家JSP程序设计有所帮助。

关键字词:JSP编程  

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