📄 cookietrackservlet.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 javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @author haoyulong
*
* To change the template for this generated type comment go to
* Window - Preferences - Java - Code Generation - Code and Comments
*/
public class cookieTrackServlet extends HttpServlet {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
Cookie cookie = null;
//获取请求相关的cookie
Cookie[] cookies = request.getCookies( );
//判断Cookie VisitTimes是否存在
//如果存在，其值加1
if (cookies != null){
for (int i = 0; i < cookies.length; i++){
if (cookies[i].getName( ).equals("VisitTimes")){
String v=cookies[i].getValue();
int value=Integer.parseInt(v)+1;
cookies[i].setValue(Integer.toString(value));
cookie=cookies[i];cookie.setMaxAge(10000);
response.addCookie(cookie);
}
}//end for
}//end if
//不存在，创建cookie
if (cookie == null){
int maxAge=10000;
//Create the Cookie object
cookie = new Cookie("VisitTimes","1");
// cookie.setPath("/");
cookie.setMaxAge(maxAge);
response.addCookie(cookie);
}//end if
// 显示信息
response.setContentType("text/html;charset=gb2312");
java.io.PrintWriter out = response.getWriter( );
out.println("<html>");
out.println("<head>");
out.println("<title>Cookie跟踪会话 </title>");
out.println("</head>");
out.println("<body>");
out.println(
"<h2> 您好!</h2>");
out.println("欢迎您第 "+cookie.getValue( )+"次访问本页面<br>");
out.println("</body>");
out.println("</html>");
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
//TODO Method stub generated by Lomboz
doGet(request,response);
}
}
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