loginservlet.java

超市进销存系统,采用mvc+DAO模式编写

package mybaobao;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {

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

		doPost(request,response);
	}

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

		String path="index.jsp";
		String uid=request.getParameter("userid");
		String passw=request.getParameter("password");
		
		//System.out.println(uname);
		
		User user=new User();
		user.setId(uid);
		user.setPassword(passw);
		//System.out.println(user.getName());
		try
		{
			if(DAOFactory.getUserDAOImpl().islogin(user))
			{
				
				//登录成功
				//用户的名字保存到session中
				path="login_suc.jsp";
				request.getSession().setAttribute("name",user.getId());
				System.out.println(user.getId());
				
				
			}
			else
			{
				request.setAttribute("error", "错误的用户名或密码!!!");
			}
		}
		catch(Exception e)
		{
			System.out.println(e);
		}
		request.getRequestDispatcher(path).forward(request, response);
	}

}