jsp加入文本计数器
(2008-11-07 10:39:20)
标签:
编程javait |
分类: 计算机 |
<%@ page contentType="text/html;charset=gb2312"
%>
<!--jsp计数器-->
<html>
<head>
<title>jsp计数器</title>
</head>
<body>
<%@ page import="java.io.*" %>
<%
String currentRecord = null;//保存文本的变量
BufferedReader file; //BufferedReader对象,用于读取文件数据
String nameOfTextFile = "c:\\count.txt";
//如果是相对路径request.getRealPath("/")+"count.txt";
//读取
file = new BufferedReader(new FileReader(nameOfTextFile));
String readStr =null;
int writeStr =0; //如果计数文本中的计数值为空则让它显示时变成1并写入
try
{
catch (IOException e)
{ System.out.println("读取数据错误."); }
if (readStr == null) readStr = "没有任何记录";
//判断cookie,第一次登陆时加1,刷新时不累计计数
else
{ writeStr = Integer.parseInt(readStr)+1;}
//写入时控制因为刷新引起的重复计数
try {
PrintWriter pw = new PrintWriter(new
FileOutputStream(nameOfTextFile));
pw.println(writeStr);
pw.close();}
catch(IOException e) {
out.println(e.getMessage());}
%>
<p
align="center">您是CNJSP的第<b><font
color="red"><%=writeStr%></font></b>位客人。</p>
</body>
</html>