logxservlet.java

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package com.yxq.servlet;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
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.yxq.dao.LogonDao;
import com.yxq.valuebean.MasterBean;

public class LogXServlet extends HttpServlet
{
	private static final long serialVersionUID = 1L;

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

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		String action = request.getParameter("action");
		if (action == null)
			action = "";
		if (action.equals("islogon"))
		{
			this.isLogon(request, response);
		}
		if (action.equals("logon"))
		{
			this.logon(request, response);
		}
		if (action.equals("logout"))
		{
			this.logout(request, response);
		}
	}

	public void isLogon(HttpServletRequest request, HttpServletResponse response)
			throws IOException
	{
		String forward = "";
		HttpSession session = request.getSession();
		if (session.getAttribute("logoner") != null)
			forward = "admin/AdminIndex.jsp";
		else
			forward = "admin/logon.jsp";
		response.sendRedirect(forward);

	}

	public boolean validateLogon(HttpServletRequest request,
			HttpServletResponse response)
	{
		boolean mark = true;
		String messages = "";
		String name = request.getParameter("userName");
		String password = request.getParameter("userPass");
		if (name == null || name.equals(""))
		{
			mark = false;
			messages += "<li>请输入 <b>用户名！</b></li>";
		}
		if (password == null || password.equals(""))
		{
			mark = false;
			messages += "<li>请输入 <b>密&nbsp;&nbsp;码！</b></li>";
		}
		request.setAttribute("messages", messages);
		return mark;
	}

	public void logon(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		boolean flag = validateLogon(request, response);
		RequestDispatcher rd = null;
		if (flag)
		{
			LogonDao masterDao = new LogonDao();
			MasterBean logoner = new MasterBean();
			logoner.setMasterName(request.getParameter("userName"));
			logoner.setMasterPass(request.getParameter("userPass"));
			boolean mark = masterDao.logon(logoner);
			if (!mark)
			{
				request.setAttribute("messages", "<li>输入的用户名或密码错误！</li>");
				rd = request.getRequestDispatcher("/admin/logon.jsp");
				rd.forward(request, response);
			} else
			{
				HttpSession session = request.getSession();
				session.setAttribute("logoner", logoner);
				response.sendRedirect("admin/AdminIndex.jsp");
			}
		} else
		{
			rd = request.getRequestDispatcher("/admin/logon.jsp");
			rd.forward(request, response);
		}
	}

	public void logout(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		HttpSession session = request.getSession();
		session.removeAttribute("logoner");
		RequestDispatcher rd = request
				.getRequestDispatcher("/front/FrontIndex.jsp");
		rd.forward(request, response);
	}
}