addlineitemaction.java

一个很不错的网上小型购物系统

package action;

import java.io.PrintWriter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import service.CartService;
import service.ProductService;
import service.ServiceFactory;
import domain.LineItem;
import domain.Product;

public class AddLineItemAction extends Action {
	ProductService productService = ServiceFactory.getProductService();

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		String productId = request.getParameter("id");
		if (productId != null) {
			CartService cartService = (CartService) request.getSession()
					.getAttribute("CartService");
			if (cartService != null) {
				Product product = productService.findById(productId);
				LineItem li = new LineItem();
				li.setProductId(product.getId());
				li.setProductName(product.getName());
				li.setPrice(product.getPrice());
				li.setNum(1);
				cartService.addLineItem(li);
				out.print("true");
			} else {
				out.print("false");
			}

		}
		return null;
	}
}