package com.zzsn.common;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;


/**
 * 普通类调用Spring bean对象：
 * 说明：
 * 1、此类需要放到App.java同包或者子包下才能被扫描，否则失效。
 * @author Administrator
 */

@Component
public class SpringUtil implements ApplicationContextAware{

	private static ApplicationContext applicationContext = null;


	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if(SpringUtil.applicationContext == null){
			SpringUtil.applicationContext  = applicationContext;
		}
		System.out.println("---------------------------------------------------------------------");
		System.out.println("---------------------------------------------------------------------");
		System.out.println("---------------com.example.order.util.SpringUtil------------------------------------------------------");
		System.out.println("========ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,applicationContext="+SpringUtil.applicationContext+"========");
		System.out.println("---------------------------------------------------------------------");

	}

	//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);
	}

}