package cn.csdn.web.cookie;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.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;
/*Cookie API*/
public class CookieDemo extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("UTF-8");
response.setHeader("Content-Type", "text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
//你得到上次访问的cookie对象
out.print("您上次访问的时间是: ");
Cookie cookies[] = request.getCookies();
for (int i = 0; cookies!=null && i < cookies.length; i++) {
Cookie cookie = cookies[i];
if("lastTime".equals(cookie.getName())){
String lastTime = cookie.getValue();
Date date = new Date(Long.parseLong(lastTime));
out.println(date.toLocaleString());
}
}
//记录这次cookie信息 记录你这次访问日期
//创建Cookie
Cookie ck = new Cookie("lastTime", System.currentTimeMillis()+"");
//有效日期为0时 创建cookie到会话结束 删除cookie
ck.setMaxAge(3600);//1小时
ck.setPath("/20111024/servlet/cookieDemo");
//发送给你的响应
response.addCookie(ck);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}