adminuserservlet.java

该系统是一个留言本

package com.v512.guestbook;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import com.v512.guestbook.dao.AdminDAO;
import com.v512.guestbook.dao.jdbc.AdminDAOJdbc;
import com.v512.util.*;

public class AdminUserServlet extends HttpServlet {

	private static final long serialVersionUID = -8685314627799302296L;

	public void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		String message = "";
		if (StringUtil.validateNull(username)) {
			message = "对不起,用户名不能为空,请重新输入!";
			request.setAttribute("guestbook.admin.login.message", message);
			request.getRequestDispatcher("/admin/loginFail.jsp").forward(request, response);
		} else if (StringUtil.validateNull(password)) {
			message = "对不起,密码不能为空,请重新输入!";
			request.setAttribute("guestbook.admin.login.message", message);
			request.getRequestDispatcher("/admin/loginFail.jsp").forward(request, response);
		} else {

			AdminDAO dao = new AdminDAOJdbc();
			if (dao.getAdmin(username, password) == null) {
				message = "对不起,用户名或者密码不正确,请重新输入!";
				request.setAttribute("guestbook.admin.login.message", message);
				request.getRequestDispatcher("/admin/loginFail.jsp").forward(request, response);
			} else {
				HttpSession session = request.getSession();
				session.setAttribute("guestbook.admin.username", username);
				response.sendRedirect(request.getContextPath() + "/admin/secure/manage?q=list");
			}
		}
	}

	public void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		HttpSession session = request.getSession();
		session.removeAttribute("guestbook.admin.username");
		response.sendRedirect(request.getContextPath() + "/admin/login.jsp");
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String method = request.getParameter("q");
		if (method != null && method.equals("login")) {
			login(request, response);
		} else {
			logout(request, response);
		}
	}

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