import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class ax  extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //設定編碼格式
        response.setContentType("text/html;Charset=UTF-8");

        String lastAccessTime = null;
        //獲取所有cookie
        Cookie[] cookies = request.getCookies();
        //遍歷cookies陣列
        String lastAccess = "2";
        for (int i=0;cookies != null && i<cookies.length;i++){
            if(lastAccess.equals(cookies[i].getName())){
                lastAccessTime = cookies[i].getValue();
                break;
            }
        }
        //判斷lastAccessTime是否為空
        if(lastAccessTime == null){
            response.getWriter().println("您是首次訪問本頁面！");
        }else {
            response.getWriter().println("您上次訪問的時間是："+lastAccessTime);
        }
        //建立cookie物件，把當前時間作為cookie值傳送給客戶端
        String currentTime = new SimpleDateFormat("yyyy-MM-dd-hh:mm:ss").format(new Date());
//        response.getWriter().println(currentTime);
        //建立cookie物件裡面name和value不能出現空格
        Cookie cookie = new Cookie(lastAccess,currentTime);
        //傳送cookie
//        cookie.setMaxAge(-1);
        response.addCookie(cookie);
    }

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

}