javaWeb 使用cookie显示上次访问网站时间

package de.bvb.cookie;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

import javax.enterprise.inject.ResolutionException;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.swing.text.DateFormatter;

/**
* 显示上次访问时间
*
* @author joker
*
*/
public class CookieDemo1 extends HttpServlet {

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

response.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=UTF-8");

PrintWriter out = response.getWriter();
out.write("您上次访问的时间是: ");

// 获取上次访问时间
Cookie[] cookies = request.getCookies();
for (int i = 0; cookies != null && i < cookies.length; i++) {
if (cookies[i].getName().equals("lastAccessTime")) {
Long cookieValue = Long.parseLong(cookies[i].getValue());
out.write(new Date(cookieValue).toLocaleString());
}
}

// 保存本次访问时间
Cookie cookie = new Cookie("lastAccessTime", System.currentTimeMillis()
+ "");
response.addCookie(cookie);

}

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

doGet(request, response);
}

}