loginservlet.java

java sql jsp javabean

package com.gc.biz;

import java.io.IOException;
import java.io.PrintWriter;

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.gc.action.Users;
import com.gc.dao.DUsers;

public class LoginServlet extends HttpServlet {
	private HttpSession ses = null;
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		ses = request.getSession();
		if(request.getParameter("account")!=null &&
		request.getParameter("password")!=null)
		{
			DUsers user = new DUsers();
			String account = request.getParameter("account").trim();
			String password = request.getParameter("password").trim();
			Users us = new Users();
			us.setAccount(account);
			us.setUpassword(password);
			if(user.isUsers(account, password))
			{
				ses.setAttribute("users",us);
				request.getRequestDispatcher("/LoginResult.jsp?isUser=true").forward(request, response);
			}else
			{
				request.getRequestDispatcher("/LoginResult.jsp?isUser=false").forward(request, response);
				destory();
			}
		}else
		{
			destory();
			request.getRequestDispatcher("/index.jsp").forward(request, response);
		}
	}
	/**
	 * 清除关于客户的所有会话信息
	 */
	private void destory()
	{
		if(ses!=null)
		{
			if(ses.getAttribute("users")!=null)
			{
				ses.removeAttribute("users");
			}
			if(ses.getAttribute("shopper")!=null)
			{
				ses.removeAttribute("shopper");
			}
		}
	}
}