viewaction.java

1.DATABASE目录下存放的是网上购书系统的数据库脚本文件以及相应的jdatastore数据库文件。 2.bookstoreejb目录下存放的工程对应于网上购书系统的ejb部分。 3.shop

package shopping.action;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import java.util.List;
public class ViewAction extends Action {
  public ActionForward perform(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) {
    HttpSession session =httpServletRequest.getSession(false);
    System.out.println(" the view function begins...");
    String buttonContinue = httpServletRequest.getParameter("continue");
    String buttonBalance = httpServletRequest.getParameter("balance");
    ActionForward actionForward = null;
//delete itme in the cart
    List cart =(List)session.getAttribute("cart");
    String deletebookname =httpServletRequest.getParameter("deletebookname");
    if(deletebookname!=null){
      System.out.println("delete the cart item...");
      for(int i=0,j=cart.size();i<j;i++){
        shopping.form.InitialBookForm initialBookForm =(shopping.form.InitialBookForm)cart.get(i);
        if(deletebookname.equals(initialBookForm.getBookname())){
          cart.remove(initialBookForm);
          System.out.println("remove the item in the cart is successful!");
          break;
        }
      }
      session.setAttribute("cart",cart);
      actionForward = actionMapping.findForward("viewjsp");
    }

//
    if(buttonContinue!=null){
      System.out.println("to initial.jsp...");
      actionForward = actionMapping.findForward("initialjsp");
    }else if(buttonBalance!=null){
      System.out.println("to payonline.jsp...");
      actionForward =actionMapping.findForward("balance");
    }
    System.out.println("end of the view function.");
     return actionForward;
  }
}