beer4allbasedispatchaction.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.actions.DispatchAction;
import com.cavaness.beer4all.service.Beer4AllService;
import com.cavaness.beer4all.service.ServiceStartupException;
import com.cavaness.beer4all.util.Constants;
import javax.servlet.ServletContext;
import com.cavaness.beer4all.service.ServiceFactory;
import javax.servlet.http.HttpServletRequest;

public class Beer4AllBaseDispatchAction extends DispatchAction{
  public Beer4AllService getBeer4AllService() throws ServiceStartupException
  {
    ServletContext context = getServlet().getServletContext();
    ServiceFactory factory = (ServiceFactory)context.getAttribute(Constants.SERVICE_FACTORY_KEY);
    return (Beer4AllService)factory.createService();
  }

  protected UserContainer getUserContainer( HttpServletRequest request ){
    //从会话对象获得用户信息库
    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();
      //设置用户信息库中的Locale信息
      container.setLocale( request.getLocale() );
      //返回用户信息库
      request.getSession().setAttribute( Constants.USER_CONTAINER_KEY, container );
    }

    //返回用户信息库
    return container;
  }

}