【会话技术】Cookie技术 案例：访问时间

创建时间：6.30

代码：

package cookie;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

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 LastAccessTimeServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
        Date date = new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd/hh:mm:ss");
        String currentTime = format.format(date);
        
        Cookie cookie = new Cookie("lastAccessTime",currentTime);
        cookie.setMaxAge(60*10*500);
        response.addCookie(cookie);
        
        String lastAccessTime = null;
        Cookie[] cookies = request.getCookies();
        if(cookies!=null){
            for(Cookie coo : cookies){
                if("lastAccessTime".equals(coo.getName())){
                    lastAccessTime = coo.getValue();
                }
            }
        }
        
        response.setContentType("text/html;charset=UTF-8");
        if(lastAccessTime==null){
            response.getWriter().write("您第一次访问");
        }else{
            response.getWriter().write("上次访问时间："+lastAccessTime);
        }
        
    }

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

结果：