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JSP
一个可以防止刷新的JSP计数器
jsp文件操作之写入篇
jsp文件操作之追加篇
jsp文件操作之读取篇
六、访问CGI变量
七、HTTP应答状态
八、设置HTTP应答头
十、会话状态
十二、脚本元素、指令和预定义变量
十三、JSP动作
五、读取HTTP请求头
JSP入门教程(1)
九、处理Cookie
JSP入门教程(3)
JSP入门教程(4)
四、处理表单数据
JSP在Linux下的安装
在 Linux 上安装Apache+ApacheJServ+JSP
在Windows/NT上建立JSP环境
Java Servlet和JSP教程

JSP 中的 jsp计数器代码


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<!--
JSP-Hitcounter counts sessions.
Copyright (C) 2000 Jesper Schmitz Mouridsen.
Visit www.webappcabaret/jsm2/webapps.jsp?find=jsphcs for more info.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License at http://www.opensource.org/licenses/gpl-license.html for more details
-->

<%
BufferedReader inf = new BufferedReader(new FileReader("/path/to/counter.txt"));
int tmp = Integer.parseInt(inf.readLine());
int i=0;
try {
i = Integer.parseInt(request.getSession().getValue("tal").toString());
} catch (NullPointerException t) {i=0; }
if (i==0) {
tmp++;
PrintWriter outf = new PrintWriter(new BufferedWriter(new FileWriter("/path/to/counter.txt")));
outf.println(tmp);
outf.close();
inf.close();
request.getSession().putValue("tal", "1");
}
BufferedReader inf2 = new BufferedReader(new FileReader("/path/to/counter.txt"));
%>
<%
String zeroes="";
String hits = inf2.readLine();
inf2.close();
for (int t=0; t < 8-hits.length(); t++) {
zeroes=zeroes+"0"; }
out.println(zeroes + hits);
%>