loginservlet.java

电子商务系统： 项目描述：该系统主要完成用户网上购物、订单管理、产品管理、管理员管理等功能。后台管理员对产品类别和产品进行管理后

package com.tarena.shop.servlet;

import java.io.IOException;

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.shop.biz.ShoppingCart;
import com.tarena.shop.entity.User;

public class LoginServlet extends HttpServlet{
	public void doPost(HttpServletRequest req,HttpServletResponse resp)
	throws ServletException,IOException
	{
		HttpSession session=req.getSession();
		if(session==null){
			System.out.println("no session");
			System.exit(1);
		}
		String pagef = null;
		String name = (String)req.getParameter("username");
		String psw = (String)req.getParameter("password");
		User user=null;
		System.out.println(name+": password is "+psw);
		ShoppingCart sp=new ShoppingCart();
		if(sp.login(name, psw)!=null){
		try {
			user=sp.login(name, psw);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		session.setAttribute("User", user);
		System.out.println(user.getUserName()+"一登录");
		pagef ="/shoppingcart/DetailServlet";
		}else{
			System.out.print("you can not login in ,name or password is wrong");
			pagef =	"wrong.jsp";
		}
		System.out.println("pagef"+(String)session.getAttribute("pagef"));
		if(session.getAttribute("pagef")!=null){
			pagef=(String)session.getAttribute("pagef");
			System.out.println(pagef);
		}
		resp.sendRedirect(pagef);
	}
	
		
}