java小容器

public class ServiceProvinder{   private static ServiceProvinderCore sc;   static{       System.err.println("xxxxxxxxxxx");       sc = new ServiceProvinderCore();       sc.load("beans.xml");   }   public static Object getService(String beanName){         System.err.println("ppppppppppppp");         if(StringUtils.isBlank(beanName)){              throw new RuntimeException("您访问的服务器名称不能为空");           }  }  object bean = null;  //如果spring容器中包含beanName  if(sc.ctx.containsBean(beanName)){      bean = sc.ctx.getBean(beanName); } //如果spring容器中不包含beanName if(bean == null){      throw new RuntimeException("您要访问的服务器名称["+beanName+"]不存在");  }  return bean;}