managedproductaction.java

简单的web应用,实现基本的购物车功能,有良好的扩展性

package struts.action;

import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import struts.actionform.ManagedProductForm;
import struts.actionform.LoginForm;
import bo.LoginBo;
import bo.ProductBo;
import java.util.ArrayList;

public class ManagedProductAction extends Action {
    public ActionForward execute(ActionMapping actionMapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) {
        ManagedProductForm form = (ManagedProductForm) actionForm;

        return this.getActionForward(actionMapping, form, servletRequest);
    }

    /**
  * 页面转向
  * @param mapping
  * @param theForm
  * @return 将要转向的页面
  */
 private ActionForward getActionForward(ActionMapping mapping,
                                        ManagedProductForm form,
                                        HttpServletRequest request) {
     String event = form.getEvent();
     ProductBo bo = ProductBo.getInstance();
     if ("edit".equals(event)) {
         bo.editProdcut(form);
          return mapping.findForward("edit");
     } else if ("add".equals(event)) { //添加新的用户
         return mapping.findForward("add");
     } else if ("save".equals(event)) {
         if(form.getProductId() != null && !"".equals(form.getProductId())){
             bo.saveEditProduct(form);
         }else{
             bo.addProduct(form);
         }
     }else if("delete".equals(event)){
         bo.removeProduct(form);
         form.setMsg("删除成功！");
     }
     form.setProductList((ArrayList)bo.getProductList());
     return mapping.findForward("list");
 }

}