loginservlet.java

一个公司管理系统,用简单的htmlt要servlet做的,有增.查.改功能.适合同学学习交流.

package com.tarena.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.tarena.dao.UserDao;
import com.tarena.dao.UserDaoImpl;
import com.tarena.vo.Users;
/**
 * 
 * @author dong xuyuan
 *
 */
public class LoginServlet extends HttpServlet {

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

	@Override
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		String username = request.getParameter("username");
		String password = request.getParameter("password");

		UserDao userdao = new UserDaoImpl();
		Users user = userdao.checkUserValid(username, password);

		RequestDispatcher rd = null;
		if (user == null) {
			rd = request.getRequestDispatcher("loginErr.html");
		} else {
			HttpSession session = request.getSession();
			session.setAttribute("user", user);
			rd = request.getRequestDispatcher("company?action=list");
		}
		
		rd.forward(request, response);
	}

}