buyaction.java

一个ssh的网上购物系统

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.xfaccp.bookonline.struts.action;

import java.util.HashMap;

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

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 com.xfaccp.bookonline.hib.dto.CartTable;
import com.xfaccp.bookonline.hib.dto.OrderitemTable;

/**
 * MyEclipse Struts Creation date: 09-15-2007
 * 
 * XDoclet definition:
 * 
 * @struts.action path="/buy" name="orderItemForm" scope="request"
 *                validate="true"
 */
public class BuyAction extends Action {
	/*
	 * Generated Methods
	 */

	/**
	 * Method execute
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		CartTable car = (CartTable) form;// TODO Auto-generated
		                                // method stub
		HttpSession session = request.getSession();
		// 获取书本的编号
		Integer id = car.getBookid();
		int quantity = car.getQuantity().intValue();
		int price = car.getPrice().intValue();
		int sum=quantity*price;
		car.setSum(new Integer(sum));
		if (session.getAttribute("cart") == null) {
			// 创建个HashMap对象
			HashMap map = new HashMap();
			// 第一个时
			map.put(id, car);
			session.setAttribute("cart", map);
		} else {
			HashMap map = (HashMap) session.getAttribute("cart");
			if (map.containsKey(id) == true) {
				// 如果有这样的键(获取数量count)
				int count = ((OrderitemTable) map.get(id)).getQuantity()
						.intValue();
				 quantity+=count;
				 sum=quantity*price;
				 car.setSum(new Integer(sum));
				car.setQuantity(new Integer(quantity));
				map.put(id, car);
				session.setAttribute("cart", map);
			} else {
				// 如果没有这样的键
				map.put(id, car);
				session.setAttribute("cart", map);
			}
		}
		return new ActionForward(mapping.getInput());
	}
}