Statistics of Java web website visits-javaTutorial-php.cn

Statistics of Java web website visits

高洛峰

Release： 2017-01-23 17:06:50

Original

1573 people have browsed it

When a customer accesses the website, read this file, read the count before the server is restarted, increase it by 1, and then write the new count to the file.

The reference code is as follows:

<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>

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