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技术教程 -> JSP教程 ->  
jsp计数器代码
来源:转载   人气:1599   录入时间:2007-11-8
    
   <!--
   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);
   %>
   
   




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