📄 counter2.jsp
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<!--counter1.jsp-->
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.io.*"%>
<html>
<head>
<title>counter</title>
</head>
<body>
<%
int temp=1;
Integer userNum;
if(session.isNew()){
File f=new File("E:/temp","counter.txt");
try{
FileInputStream fin=new FileInputStream(f);
DataInputStream dataIn=new DataInputStream(fin);
temp=dataIn.readInt();
fin.close();
dataIn.close();
temp+=1;
}
catch(FileNotFoundException e){
out.println("file error!");
}
catch(IOException e){}
userNum=new Integer(temp);
application.setAttribute("userNum",userNum);
try{
FileOutputStream fout=new FileOutputStream(f);
DataOutputStream dataOut=new DataOutputStream(fout);
dataOut.writeInt(temp);
fout.close();
dataOut.close();
}
catch(FileNotFoundException e){
}
catch(IOException e){}
}
else{
userNum=(Integer)(application.getAttribute("userNum"));
if(userNum==null){out.println("error");}
temp=userNum.intValue();
}
out.println("服务器本次开启共接待了"+temp+"位访客。<br>");
Integer freshNum=(Integer)session.getAttribute("freshNum");
if(freshNum==null){
freshNum=new Integer(1);
session.setAttribute("freshNum",freshNum);
out.println("欢迎您的到来。<br>");
}
else{
temp=freshNum.intValue()+1;
freshNum=new Integer(temp);
session.setAttribute("freshNum",freshNum);
out.println("您第"+temp+"次刷新此页面。<br>");
}
%>
</body>
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