实现ApplicationContextAware接口时，获取ApplicationContext为null

将懒加载关闭，@Lazy(false)，默认为true

 import org.springframework.beans.BeansException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;

 @Service
 @Lazy(false)
 public class SpringContextUtil implements ApplicationContextAware {

     private static ApplicationContext applicationContext = null; // Spring应用上下文环境

     /*
      *
      * 实现了ApplicationContextAware 接口，必须实现该方法；
      *
      * 通过传递applicationContext参数初始化成员变量applicationContext
      */

     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
         SpringContextUtil.applicationContext = applicationContext;
     }

     public static ApplicationContext getApplicationContext() {
         return applicationContext;
     }

     @SuppressWarnings("unchecked")
     public static <T> T getBean(String name) throws BeansException {
         return (T) applicationContext.getBean(name);
     }

 }