Spring获取ApplicationContext对象工具类

（1）实现的工具类：

package com.util;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

final public class ApplicationContextUtil {

	private static ApplicationContext ac=null;
	
	private ApplicationContextUtil(){
		
	}
	
	static{
		ac=new ClassPathXmlApplicationContext("applicationContext.xml");
	}
	
	public static ApplicationContext getApplicationContext(){
		//获得返回的容器对象
		return ac;
	}
	
}

public static void getByUtil(){
		ApplicationContextUtil.getApplicationContext().getBean("userService");
	}