showcookie.java

实现的cookie的登陆和上传和更改实现的cookie的登陆和上传和更改

package servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ShowCookie extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		 response.setContentType("text/html;charset=gb2312");
         PrintWriter out = response.getWriter();
         out .println("");
         out.println("");
         out.println(" ");
         out.println(" ");

         Cookie[] cookies = request.getCookies();

         int count = 0;
         boolean bool=true;
         Cookie cookie=null;

         if (cookies != null) {
             for (int i = 0; i < cookies.length; i++) {
                 cookie = cookies[i];

                 if ("accpCount".equals(cookie.getName())) {
                     count = Integer.parseInt(cookie.getValue())+1;
                     cookie.setValue(count+"");
                     cookie.setMaxAge(60*60*24);
                     response.addCookie(cookie);
                     out.println("你是第" + count + "次登录该网页。");
                     if(count==3){
                    	 out.println("恭喜你，你已经成为我们幸运客户，我们将有丰厚的礼品送给你。");
                     }

                    bool=false;
                    break;
                  }
              }
             }
             if(bool){
                 out.println("你是第 1 次登录该网页。在此之前没有相关Cookie信息。");
                 cookie=new Cookie("accpCount", "1");
                 cookie.setMaxAge(60*60*24);
                 response.addCookie(cookie);
             }

             out.println(" ");
             out.println("");
             out.flush();
             out.close();


	}

}