ApplicationContextAware用法
当一个类实现了这个接口之后，这个类就可以方便的获得ApplicationContext对象（spring上下文），Spring发现某个Bean实现了ApplicationContextAware接口，Spring容器会在创建该Bean之后，自动调用该Bean的setApplicationContext（参数）方法，调用该方法时，会将容器本身ApplicationContext对象作为参数传递给该方法。
案例
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
@Component
public class ZYLApplicationContextAware implements ApplicationContextAware {
private static ApplicationContext context;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
context = applicationContext;
}
public static ApplicationContext getApplicationContext(){
return context;
}
/**
* 通过name获取 Bean
* @param name beanName
* @return Object
*/
public static Object getBean(String name){
return getApplicationContext().getBean(name);
}
public static <T> T getBean(Class<T> requiredType) throws BeansException{
return getApplicationContext().getBean(requiredType);
}
}