userservlet.java

cantain海鲜超市管理系统

package com.j1132.servlet.permission;

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.j1132.bean.UserBean;
import com.j1132.dao.denglu.Iuser;
import com.j1132.dao.denglu.UserDao;
import com.j1132.util.Constance;

public class UserServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = -6978055366894936303L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String username = "";
		String password = "";
		String page = "";
		
		//转向页面
		RequestDispatcher rd = null;
		//通过请求获得username和password
		username = req.getParameter("username");

		password = req.getParameter("password");
        // 创建userdao对象
		Iuser userdao = new UserDao();
		
         //通过userdao中的result方法 给ub赋值
		UserBean ub = userdao.result(username, password);
          //判断登陆是否成功
		if (ub.getUsername() != null) {
			HttpSession hs = req.getSession();
			//存放当前的登录的用户到会话中
			hs.setAttribute(Constance.CURRENT_USER, ub);
			
				page = "jsp/sf_welcome.jsp";
			
		}
		//转向页面
		rd = req.getRequestDispatcher(page);
		rd.forward(req, resp);
	}

	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		doGet(req, resp);
	}

}