<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ page import="java.io.*" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'MyJsp9.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<%
File dir=new File("C:/","Upload");
boolean a=dir.mkdir();
File f =new File(dir,"java.txt");
%>
<body>
This is my JSP page. <br>
<%= a %>
</body>
</html>
如题，为什么在我的Upload目录下没java.txt文件啊？
是哪里出现问题吗？还是 不是这样做，我就想新建一个文件
