Spring —— 利用BeanFactory实现单例模式

问题

如何使用Spring中的BeanFactory实现单例模式？

解决

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;

@Component
public class instanceTest implements BeanFactoryAware {
	private static instanceTest INSTANCE = null;

	/**
	 * 获取instanceTest实例
	 */
    public static void getInstanceTest() {
		Assert.notNull(INSTANCE,"获取instanceTest实例失败！");
    }

	@Override
	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        //获取Spring中的bean
		instanceTest bean = beanFactory.getBean(this.getClass());
		Assert.notNull(bean,"获取instanceTest实例失败 :(");
		INSTANCE = bean;
	}
}