Spring获取Application Context以及bean方法

如何在Spring中获取Application Context进而获取已加载的bean呢？

常见的方式是实现ApplicationContextAware接口，参考代码如下所示：

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

@Component
public class ApplicationContextProvider implements ApplicationContextAware
{
	/**
	 * 上下文对象实例
	 */
	private ApplicationContext applicationContext;

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		this.applicationContext = applicationContext;
	}

	/**
	 * 获取applicationContext
	 * @return
	 */
	public ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	/**
	 * 通过name获取 Bean.
	 * @param name
	 * @return
	 */
	public Object getBean(String name){
		return getApplicationContext().getBean(name);
	}

	/**
	 * 通过class获取Bean.
	 * @param clazz
	 * @param <T>
	 * @return
	 */
	public <T> T getBean(Class<T> clazz){
		return getApplicationContext().getBean(clazz);
	}

	/**
	 * 通过name,以及Clazz返回指定的Bean
	 * @param name
	 * @param clazz
	 * @param <T>
	 * @return
	 */
	public <T> T getBean(String name,Class<T> clazz){
		return getApplicationContext().getBean(name, clazz);
	}
}

参考文档：

https://blog.youkuaiyun.com/ex_tang/article/details/82749844