package cn.edu.cg.controller;

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

import cn.edu.cg.dao.BookDaoImpl;
import cn.edu.cg.domain.Book;
import cn.edu.cg.domain.Cart;

@WebServlet("/BuyServlet")
public class BuyServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");//这一行功能在下一行中已经有了。
		response.setContentType("text/html; charset=UTF-8");
		String id=request.getParameter("id");
		BookDaoImpl dao=new BookDaoImpl();
		Book book = dao.find(id);
		Cart cart = (Cart) request.getSession().getAttribute("cart");
		if(cart==null){
			cart = new Cart();
			request.getSession().setAttribute("cart", cart);
		}
		
		//把书加到用户购物车中,完成购买
		cart.add(book);
		
		//response.sendRedirect("/WEB-INF/jsp/listcart.jsp");
		request.getRequestDispatcher("/listcart.jsp").forward(request, response);
	}

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