当客户访问网站时就去读这个文件,将服务器重新启动前的计数读入,并在此基础上增加1,然后将新的计数写入到文件中。
参考代码如下:
<html>
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< head >
< meta http-equiv = "Content-Type" content = "text/html; charset=utf-8" >
< title >Insert title here</ title >
</ head >
< body >
<%!
int number = 0;
File file = new File("count.txt");
synchronized void countPeople()
{
if(!file.exists())
{
number++;
try{
file.createNewFile();
FileOutputStream out = new FileOutputStream("count.txt");
DataOutputStream dataOut = new DataOutputStream(out);
dataOut.writeInt(number);
dataOut.close();
}catch(IOException ex){}
}
else
try{
FileInputStream in = new FileInputStream("count.txt");
DataInputStream dataIn = new DataInputStream(in);
number = dataIn.readInt();
number++;
in.close();
dataIn.close();
FileOutputStream out = new FileOutputStream("count.txt");
DataOutputStream dataOut = new DataOutputStream(out);
dataOut.writeInt(number);
out.close();
dataOut.close();
}catch(IOException ex){}
}
%>
<%
countPeople();
%>
< p >
您是第
<%=number %>
个访问网站的客户。
</ p >
</ body >
</ html >
|
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。