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package basic;

import java.io.IOException;

import javax.servlet.RequestDispatcher;

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 javax.servlet.http.HttpSession;

@WebServlet(name = "cart", urlPatterns = { "/cart.do" })

public class ShoppingCart extends HttpServlet {

protected void doPost(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

request.setCharacterEncoding("euc-kr");

String productName = request.getParameter("item");

System.out.println(productName);

HttpSession ses = request.getSession();

Integer count = (Integer)ses.getAttribute(productName);

//item에 해당하는 attribute가 없으면 null을 리턴

if(count==null){//최초 선택

ses.setAttribute(productName, 1);

}else{

//최초 작업이 아니므로 value에 1만 더해서 다시 저장

ses.setAttribute(productName, count+1);

}

RequestDispatcher rd =

request.getRequestDispatcher("/servlettest/cart.jsp");

rd.forward(request, response);

}

}