beer4allbaseaction.java

采用Struts框架做的网上啤酒买卖系统

package com.cavaness.beer4all.framework;

import org.apache.struts.action.Action;
import com.cavaness.beer4all.service.Beer4AllService;
import com.cavaness.beer4all.service.ServiceStartupException;
import javax.servlet.ServletContext;
import com.cavaness.beer4all.service.ServiceFactory;
import com.cavaness.beer4all.util.Constants;
import javax.servlet.http.HttpServletRequest;

abstract public class Beer4AllBaseAction extends Action{
  protected Beer4AllService getBeer4AllService() throws ServiceStartupException
  {
    ServletContext context = getServlet().getServletContext();
    ServiceFactory factory = (ServiceFactory)context.getAttribute(Constants.SERVICE_FACTORY_KEY);
    return (Beer4AllService)factory.createService();
  }
  //获得用户信息库
 protected UserContainer getUserContainer( HttpServletRequest request ){

   //从会话对象中获得用户信息库
   UserContainer container = (UserContainer)request.getSession().getAttribute( Constants.USER_CONTAINER_KEY );
   //如果用户信息库为空
   if (container == null){
     //创建一个新的用户信息库
     container = new UserContainer();
     //设置用户信息库的Locale信息
     container.setLocale( request.getLocale() );
     //将用户信息库作为参数置入会话对象中
     request.getSession().setAttribute( Constants.USER_CONTAINER_KEY, container );
   }
   //返回用户信息库
   return container;
 }

}