java--cookie获取上次登录时间

package com.test;

import java.io.IOException;
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;

import com.test.util.cookieUtil;

public class demo_04 extends HttpServlet {

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	response.setContentType("text/html;charset=utf-8");
	String username=request.getParameter("username");
	String passwd=request.getParameter("passwd");
	if("admin".equals(username)&& "123".equals(passwd)) {
		Cookie[] cookies = request.getCookies();
		Cookie cookie= cookieUtil.findCookie(cookies, "last");
		if(cookie == null) {
			Cookie c = new Cookie("last",System.currentTimeMillis()+"");
			c.setMaxAge(60);
			response.addCookie(c);
			response.getWriter().write("welcome, "+ username);
		}else {
			// String vaule = cookie.getValue();
			long lastVisit= Long.parseLong(cookie.getValue());
			response.getWriter().write("welcome, "+ username+"上次登录时间是："+new Date(lastVisit));
                            cookie.setValue(System.currentTimeMillis()+"");
			response.addCookie(cookie);
		}
		System.out.println("success");
		//response.getWriter().write("welcome, "+ username);
	}else {
		System.out.println("falid");
	}
}

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

}
###################################################################################
package com.test.util;

import javax.servlet.http.Cookie;

public class cookieUtil {
public static Cookie findCookie(Cookie[] cookies,String name) {
if(cookies !=null) {
for (Cookie cookie : cookies) {
if(name.equals(cookie.getName())) {
return cookie;
}
}
}
return null;

}

}

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