月嫂服务管理网站管理系统主要分为前台用户和后台管理员。不同的用户有不同的权限。一般用户只能实现管理员指定的信息，系统管理员可以对整个系统进行操作。前台用户实现的功能有：登录、注册、修改登录密码、修改详细资料、预定信息管理、查看、月嫂服务预定、月嫂服务查询、留言板；后台管理员实现的功能有：系统管理（公告管理、发布公告、网站留言管理、管理员设置、后台登录日志）、管理（管理、发布）、月嫂服务管理（月嫂服务管理、添加月嫂服务）、注册会员管理、预定报名管理。

表3 affiche 公告表

 表4 guestbook 留言板

package com.action;

/**
 * 前台会员登陆 退出
 * 
 */

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.bean.MemberBean;
import com.util.Constant;
import com.util.Filter;

public class LoginServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public LoginServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request,response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType(Constant.CONTENTTYPE);
		request.setCharacterEncoding(Constant.CHARACTERENCODING);
		HttpSession session = request.getSession();
		MemberBean memberBean = new MemberBean();
		String method = Filter.escapeHTMLTags(request.getParameter("method").trim());
		if(method.equals("HEADUSERLOGIN")){//网页头部会员登陆
			String reg_user = Filter.escapeHTMLTags(request.getParameter("reg_user").trim());
			String reg_pwd = Filter.escapeHTMLTags(request.getParameter("reg_pwd").trim());
			String reg_type = Filter.escapeHTMLTags(request.getParameter("reg_type").trim());
			String lastip = request.getRemoteAddr();
			int flag = memberBean.memberLogin(reg_user, reg_pwd, reg_type);
			if(flag == Constant.SUCCESS){//登陆成功
				String info = memberBean.getLastTimeIP(reg_user);
				int flag2 = memberBean.upmemberLogin(reg_user, lastip);
				if(flag2 == Constant.SUCCESS){
					session.setAttribute("member", reg_user);
					session.setAttribute("type", reg_type);
					session.setAttribute("info", info);
					request.getRequestDispatcher("login1.jsp").forward(request, response);
				}
				else{
					session.setAttribute("member", reg_user);
					session.setAttribute("type", reg_type);
					session.setAttribute("info", info);
					session.setAttribute("message", "登陆成功，登陆信息更新失败！");
					request.getRequestDispatcher("login1.jsp").forward(request, response);
				}
			}
			else if(flag == Constant.NAME_ERROR){//用户名错误
				request.setAttribute("reg_user", reg_user);
				request.setAttribute("message", "该用户名不存在或者已被管理员冻结！");
				request.getRequestDispatcher("login1.jsp").forward(request, response);
			}
			else if(flag == Constant.PASSWORD_ERROR){//密码错误
				request.setAttribute("reg_user", reg_user);
				request.setAttribute("message", "密码错误！");
				request.getRequestDispatcher("login1.jsp").forward(request, response);
			}
		}
		else if(method.equals("PAGEUSERLOGIN")){//登陆页面会员登陆
			String username = Filter.escapeHTMLTags(request.getParameter("username").trim());
			String password = Filter.escapeHTMLTags(request.getParameter("password").trim());
			String reg_type = Filter.escapeHTMLTags(request.getParameter("reg_type").trim());
			String lastip = request.getRemoteAddr();
			int flag = memberBean.memberLogin(username, password, reg_type);
			if(flag == Constant.SUCCESS){//登陆成功
				String info = memberBean.getLastTimeIP(username);
				int flag2 = memberBean.upmemberLogin(username, lastip);
				if(flag2 == Constant.SUCCESS){
					session.setAttribute("member", username);
					session.setAttribute("type", reg_type);
					session.setAttribute("info", info);
					request.getRequestDispatcher("hy_trave.jsp").forward(request, response);
				}
				else{
					session.setAttribute("member", username);
					session.setAttribute("type", reg_type);
					session.setAttribute("info", info);
					session.setAttribute("message", "登陆成功，登陆信息更新失败！");
					request.getRequestDispatcher("hy_trave.jsp").forward(request, response);
				}
			}
			else if(flag == Constant.NAME_ERROR){//用户名错误
				request.setAttribute("reg_user", username);
				request.setAttribute("message", "该用户名不存在！");
				request.getRequestDispatcher("login.jsp").forward(request, response);
			}
			else if(flag == Constant.PASSWORD_ERROR){//密码错误
				request.setAttribute("reg_user", username);
				request.setAttribute("message", "密码错误！");
				request.getRequestDispatcher("login.jsp").forward(request, response);
			}
		}
		else if(method.equals("logout")){//从iframe页面退出登陆
			session.removeAttribute("member");
			session.removeAttribute("type");
			request.getRequestDispatcher("login.jsp").forward(request, response);
		}
		else if(method.equals("pagelogout")||method.equals("memberexit")){//从网页退出登陆
			session.removeAttribute("member");
			session.removeAttribute("type");
			request.getRequestDispatcher("index.jsp").forward(request, response);
		}
		else{
			request.getRequestDispatcher("error.jsp").forward(request, response);
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}