?? hitcounter.java
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/*
* Created on 2004-6-13
*
* To change the template for this generated file go to
* Window - Preferences - Java - Code Generation - Code and Comments
*/
package com.servlet;
import java.io.IOException;
import java.text.DateFormat;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* @author haoyulong
*
* To change the template for this generated type comment go to
* Window - Preferences - Java - Code Generation - Code and Comments
*/
public class HitCounter extends HttpServlet {
static final String COUNTER_KEY = "Counter";
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
//TODO Method stub generated by Lomboz
// 獲取會話對象
HttpSession session = request.getSession(true);
response.setContentType("text/html;charset=gb2312");
// Get the PrintWriter to write the response
java.io.PrintWriter out = response.getWriter();
// 從會話中獲取屬性
int count = 1;
Integer i = (Integer) session.getAttribute(COUNTER_KEY);
// If a previous count exists, set it
if (i != null) {
count = i.intValue() + 1;
}
// 將屬性信息存入會話
session.setAttribute(COUNTER_KEY, new Integer(count));
//
Date lastAccessed = new Date(session.getLastAccessedTime( ));
Date sessionCreated=new Date(session.getCreationTime());
DateFormat formatter =
DateFormat.getDateTimeInstance(DateFormat.MEDIUM,
DateFormat.MEDIUM);
//
// Print a standard header
out.println("<html>");
out.println("<head>");
out.println("<title>會話計數器</title>");
out.println("</head>");
out.println("<body>");
out.println("你的會話ID: <b>" +session.getId()+ "<br>");
out.println("會話創建時間："+formatter.format(sessionCreated) + "<br>");
out.println("會話上次訪問時間："+formatter.format(lastAccessed) + "<br>");
out.println("</b> 會話期間你對頁面發起 <b>" +
count + "</b> 次請求");
out.println("<form method=GET action=\"" +
request.getRequestURL() + "\">");
out.println("<input type=submit " +
"value=\"再次點擊...\">");
out.println("</form>");
// Wrap up
out.println("</body>");
out.println("</html>");
out.flush();
}
}
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