package com.demo;

 import org.springframework.beans.BeansException;

 import org.springframework.context.ApplicationContext;

 import org.springframework.context.ApplicationContextAware;

 import org.springframework.stereotype.Component;

 @Component

 public class SpringUtils implements ApplicationContextAware {

     private static ApplicationContext applicationContext = null;

     @Override

     public void setApplicationContext(ApplicationContext arg0) throws BeansException {

         if (SpringUtils.applicationContext == null) {

             SpringUtils.applicationContext = arg0;

         }

     }

     // 获取applicationContext

     public static ApplicationContext getApplicationContext() {

         return applicationContext;

     }

     // 通过name获取 Bean.

     public static Object getBean(String name) {

         return getApplicationContext().getBean(name);

     }

     // 通过class获取Bean.

     public static <T> T getBean(Class<T> clazz) {

         return getApplicationContext().getBean(clazz);

     }

     // 通过name,以及Clazz返回指定的Bean

     public static <T> T getBean(String name, Class<T> clazz) {

         return getApplicationContext().getBean(name, clazz);

     }

 }