JSP文件下载、上传

JSP文件下载-----------------------------------------------------------------
<%@ page contentType="text/html; charset=GBK"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ page import="java.io.File"%>
<%@page import="java.io.InputStream"%>
<%@page import="java.io.FileInputStream"%>
<%
String path = request.getParameter("path") ;
if(path==null || "".equals(path)){
out.write("<mce:script type="text/javascript"><!--
") ;
out.write("alert('要下载的文件不存在');") ;
out.write("history.go(-1);") ;
out.write("
// --></mce:script>") ;
}
String realPath = "c:/myfile/正文.doc" ;
File file = new File(realPath) ;
if(!file.exists()){
out.write("<mce:script type="text/javascript"><!--
") ;
out.write("alert('要下载的文件不存在');") ;
out.write("history.go(-1);") ;
out.write("
// --></mce:script>") ;
}else{
long l = file.length() ;
InputStream in = new FileInputStream(file) ;
String fs = file.getName() ;
if(in!=null){
response.reset();
response.setContentType("application/x-msdownload");
response.setHeader("Content-disposition","attachment; filename="+new String(fs.getBytes("GBK"),"iso8859-1"));
//以上输出文件元信息
response.setContentLength((int)l); //设置输入文件长度
byte[] b = new byte[2048];
int len = 0;
while((len=in.read(b)) >0)
response.getOutputStream().write(b,0,len); //向浏览器输出
in.close(); //关闭文件输入流
response.flushBuffer();
out.clear();
out = pageContext.pushBody();
}
}
%>
文件上传----------------------------------------------------------------------
提交页面-------------
<form method="POST" enctype="multipa