excel模板下载（可适用于各种格式文件下载）

来源：互联网发布：mac快捷键截图编辑：程序博客网时间：2024/05/01 19:02

<%@page import="java.io.FileInputStream"%>
<%@page import="java.io.File"%>
<%@page language="java" contentType="application/x-msdownload" pageEncoding="utf-8"%>
<%
//关于文件下载时采用文件流输出的方式处理：
//加上response.reset()，并且所有的％>后面不要换行，包括最后一个；

response.reset();//可以加也可以不加
response.setContentType("application/x-download");

String filedownload = "D:\\MyExcel.xls";
File inFile = new File(application.getRealPath("/")+"temp\\"+"MyExcel.xls");
File inFile1 = new File(this.getClass().getResource("/").getPath());
String aa=this.getClass().getResource("").getPath()+"1.jsp";
String filedisplay = "MyExcel.xls";
// String filedisplay1 = URLEncoder.encode(filedisplay,"UTF-8");
response.addHeader("Content-Disposition","attachment;filename=" + filedisplay);

java.io.OutputStream outp = null;
java.io.FileInputStream in = null;
try
{
outp = response.getOutputStream();
in = new FileInputStream(inFile);

byte[] b = new byte[1024];
int i = 0;

while((i = in.read(b)) > 0)
{
outp.write(b, 0, i);
}
//
outp.flush();
//要加以下两句话，否则会报错
//java.lang.IllegalStateException: getOutputStream() has already been called for //this response
out.clear();
out = pageContext.pushBody();
}
catch(Exception e)
{
System.out.println("Error!");
e.printStackTrace();
}
finally
{
if(in != null)
{
in.close();
in = null;
}
//这里不能关闭
//if(outp != null)
//{
//outp.close();
//outp = null;
//}
}
%>

<html >
<head>
<title></title>
</head>
<body>

</body>
</html>