提示用户上次访问的时间

package com.caizhen.Servlet;

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

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/LastAccessServlet")
public class LastAccessServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
    public LastAccessServlet() {
		super();
		// TODO Auto-generated constructor stub
	}
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html;charset=utf-8");
		String lastAccessTime = null;
		Cookie[] cookies = request.getCookies();
		for (int i = 0; cookies != null && i < cookies.length; i++) {
			if ("lastAccess".equals(cookies[i].getName())) {
				lastAccessTime = cookies[i].getValue();
				break;
			}
		}
		if (lastAccessTime == null) {
			response.getWriter().println("您是第一次访问本站");
		} else {
			response.getWriter().println("您上次访问的时间是:" + lastAccessTime);
		}
         
		String currentTime = new SimpleDateFormat("yyyy年MM月dd日hh时:mm分:ss秒").format(new Date());
		Cookie cookie = new Cookie("lastAccess", currentTime);
		cookie.setMaxAge(60*60);
		response.addCookie(cookie);

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

}

第一运行时，IDE报错，经检查是我的Tomcat9，在cookie的value中不允许存在空格。

更改输出后，成功执行

。

发现不是24小时制度，更改后成功显示

SimpleDateFormat时间显示上，HH是24小时，hh是12小时制