获取spring容器，以访问容器中定义的其他bean

package com.ihappylife.spring.context;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 获取spring容器，以访问容器中定义的其他bean
 */
public class SpringContextUtil implements ApplicationContextAware {
 
 // Spring应用上下文环境
 private static ApplicationContext applicationContext;
 
 /**
  * 实现ApplicationContextAware接口的回调方法，设置上下文环境
  */
 public void setApplicationContext(ApplicationContext applicationContext)throws BeansException  {
  SpringContextUtil.applicationContext = applicationContext;
 }
 
 public static ApplicationContext getApplicationContext() {
  return applicationContext;
 }
 
 /**
  * 获取对象
  * 这里重写了bean方法，起主要作用
  * @param name
  * @return Object 一个以所给名字注册的bean的实例
  * @throws BeansException
  */
 public static Object getBean(String beanId) throws BeansException {
  if(applicationContext==null){
   applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext-*.xml");
  }
  return applicationContext.getBean(beanId);
 }
}

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