📄 counter1.jsp
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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="java.util.Date" %>
<jsp:useBean id="connBean" class="beans.connDB" scope="page"/>
<%
String str="";
Date date1;
date1 = new Date();
java.sql.Date date=new java.sql.Date(date1.getTime());
try{
if(session.getAttribute("flag")==null){
ResultSet rs=connBean.executeQuery("select * from tb_counter where accessTime='"+date.toString()+"'");
if(!rs.next()){
int count;
count=1;
str="insert into tb_counter values('"+date.toString()+"',"+count+")";
ResultSet rs1=connBean.executeQuery(str);
}else{
int count;
str="update tb_counter set hit=hit+1 where accessTime='"+date.toString()+"'";
ResultSet rs1=connBean.executeQuery(str);
}
String val;
val="true";
session.setAttribute("flag",val);
}
}catch(Exception e){}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>计数器</title>
</head>
<body>
<%
ResultSet rs_access=connBean.executeQuery("select sum(hit) as sumhit from tb_counter ");
if(rs_access.next()){
out.println("当前访问人数[ "+rs_access.getInt("sumhit")+"]人");
}
%>
<br>
<table width="100%" height="23" border="1" cellpadding="0" cellspacing="0" bordercolor="#FFFFFF" bordercolordark="#999999" bordercolorlight="#FFFFFF">
<tr>
<td width="12%" height="27">日期</td>
<td width="88%">访问人数</td>
</tr>
<%
ResultSet rs_chart=connBean.executeQuery("select * from tb_counter ");
while(rs_chart.next()){
%>
<tr>
<td width="12%" height="27"><%=rs_chart.getDate("accessTime")%></td>
<td width="88%"><table width="<%=rs_chart.getInt("hit")*10%>" height="20" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFCCCC">
<tr>
<td> </td>
</tr>
</table></td>
</tr>
<%
}
%>
</table>
</body>
</html>
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