buyaction.java

来自「郭克华j2ee高级框架实战教学视频源代码 这个是比较值得一看的 由郭克华博士」· Java 代码 · 共 75 行

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package prj11_1.action;

import java.util.ArrayList;

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

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.MappingDispatchAction;

import prj11_1.form.BuyForm;

public class BuyAction extends MappingDispatchAction {

	public ActionForward add(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		BuyForm buyForm = (BuyForm) form;// TODO Auto-generated method stub
		String book = buyForm.getBook();
		
		HttpSession session = request.getSession();
		ArrayList cart = (ArrayList)session.getAttribute("cart");
		if(cart==null){
			cart = new ArrayList();
			session.setAttribute("cart", cart);
		}
		cart.add(book);		
		return new ActionForward("/buy.jsp");
	}
	
	public ActionForward delete(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		String book = request.getParameter("BOOK");
		
		HttpSession session = request.getSession();
		ArrayList cart = (ArrayList)session.getAttribute("cart");
		cart.remove(book);		
		return new ActionForward("/buy.jsp");
	}
}
/*
public class BuyAction extends DispatchAction {//DispatchAction缺陷:Jsp要认识action内方法

	public ActionForward add(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		BuyForm buyForm = (BuyForm) form;// TODO Auto-generated method stub
		String book = buyForm.getBook();
		
		HttpSession session = request.getSession();
		ArrayList cart = (ArrayList)session.getAttribute("cart");
		if(cart==null){
			cart = new ArrayList();
			session.setAttribute("cart", cart);
		}
		cart.add(book);		
		return new ActionForward("/buy.jsp");
	}
	
	public ActionForward delete(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		String book = request.getParameter("BOOK");
		
		HttpSession session = request.getSession();
		ArrayList cart = (ArrayList)session.getAttribute("cart");
		cart.remove(book);		
		return new ActionForward("/buy.jsp");
	}
}*/