📄 usercounter.jsp
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<%@ page language="java" isThreadSafe="true" %>
<%@ page import="java.util.*" %>
<%@ page import="java.text.*" %>
<%!
Hashtable userTable = new Hashtable();
int totalCount=0;
public String getNowDate(){
SimpleDateFormat formatter =
new SimpleDateFormat ( "yyyy/MM/dd a hh:mm:ss", Locale.US );
Date currentTime = new Date();
return formatter.format(currentTime);
}
public int getCount( String userName ){
Integer count = (Integer)userTable.get( userName );
if( count != null ){
int nowCount = count.intValue() + 1;
userTable.put( userName, new Integer( nowCount ) );
return nowCount;
}
userTable.put( userName, new Integer( 1 ) );
return 1;
}
public void delay( long millis ){
try{
Thread.sleep( millis );
}
catch( InterruptedException intex ){
}
}
%>
<%
String username = request.getParameter( "textUserName" );
int count = getCount( username );
int localTotalCount;
synchronized( this ){
localTotalCount = ++totalCount;
}
%>
<html>
<head>
<title>Login Counter</title>
<meta http-equiv="Content-Type" content="text/html; charset=big5">
</head>
<body bgcolor="#FFFFFF">
<div align="center">
<p><font color="#0000FF">瞷⌨️ 快捷键说明
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