购物车模块总结3

来源：互联网发布：八门神器软件下载编辑：程序博客网时间：2024/04/29 18:27

BuyCartManageAction类的详细代码：用于处理购物车的修改，删除，清空等功能

中间return mapping.findForward("directUrl");这条语句用来跳转至全局配置的页面

    <global-forwards>
       <forward name="message" path="/WEB-INF/page/share/message.jsp" />
       <forward name="directUrl" path="/WEB-INF/page/share/directUrl.jsp"/>
   </global-forwards>

跳转至directUrl.jsp，

该页面使用了<c:redirect url="${directUrl}"/>，再跳转至directUrl对应的页面

@Controller("/shopping/cart/manage")
public class BuyCartManageAction extends DispatchAction {
   /**
   * 清空购物车
   */
   public ActionForward deleteAll(ActionMapping mapping, ActionForm form,
           HttpServletRequest request, HttpServletResponse response)
           throws Exception {
       BuyCart cart = WebUtil.getBuyCart(request);
       cart.deleteAll();
       BuyCartForm formbean = (BuyCartForm)form;
       String param = formbean.getDirectUrl()!=null && !"".equals(formbean.getDirectUrl()) ? "?directUrl=" + formbean.getDirectUrl() : "";
       request.setAttribute("directUrl", "/shopping/cart.do"+ param);
       return mapping.findForward("directUrl");
   }
   /**
   * 删除购物项
   */
   public ActionForward delete(ActionMapping mapping, ActionForm form,
           HttpServletRequest request, HttpServletResponse response)
           throws Exception {
       BuyCartForm formbean = (BuyCartForm)form;
       BuyCart cart = WebUtil.getBuyCart(request);
       ProductInfo product = new ProductInfo(formbean.getProductid());
       product.addProductStyle(new ProductStyle(formbean.getStyleid()));
       BuyItem item = new BuyItem(product);
       cart.deleteBuyItem(item);
       String param = formbean.getDirectUrl()!=null && !"".equals(formbean.getDirectUrl()) ? "?directUrl=" + formbean.getDirectUrl() : "";
       request.setAttribute("directUrl", "/shopping/cart.do"+ param);
       return mapping.findForward("directUrl");
   }
   /**
   * 修改购买数量
   */
   public ActionForward updateAmount(ActionMapping mapping, ActionForm form,
           HttpServletRequest request, HttpServletResponse response)
           throws Exception {
       setAmount(request);
       BuyCartForm formbean = (BuyCartForm)form;
       String param = formbean.getDirectUrl()!=null && !"".equals(formbean.getDirectUrl()) ? "?directUrl=" + formbean.getDirectUrl() : "";
       request.setAttribute("directUrl", "/shopping/cart.do"+ param);
       return mapping.findForward("directUrl");
   }
   /**
   * 修改商品购买数量
   * @param request
   */
   private void setAmount(HttpServletRequest request) {
       BuyCart cart = WebUtil.getBuyCart(request);
       for(BuyItem item : cart.getItems()){
           String paramName = "amount_"+ item.getProduct().getId()+"_"+
                               item.getProduct().getStyles().iterator().next().getId();
           Integer amount = new Integer(request.getParameter(paramName));
           item.setAmount(amount);
       }
   }
   /**
   * 结算
   */
   public ActionForward settleAccounts(ActionMapping mapping, ActionForm form,
           HttpServletRequest request, HttpServletResponse response)
           throws Exception {
       setAmount(request);
       BuyCartForm formbean = (BuyCartForm)form;
       String url = "/customer/shopping/deliver.do";
       if(formbean.getDirectUrl()!=null && !"".equals(formbean.getDirectUrl())){
           url = new String(Base64.decodeBase64(formbean.getDirectUrl().trim().getBytes()));//获取解码后的url
       }
       request.setAttribute("directUrl", url);
       return mapping.findForward("directUrl");
   }

}