Spring ApplicationContextAware

继承 ApplicationContextAware 类后， 在程序启动时会自动执行setApplicationContext方法，注入applicationContex

@Component
public class  ApplicationContextAwareUtil implements ApplicationContextAware {

    private ApplicationContext context;
	
	/**
	* 继承 ApplicationContextAware 类后，
	* 在程序启动时会自动执行setApplicationContext方法，注入applicationContext
	*/
    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        context = applicationContext;       
    }   
    
    //获得applicationContext
    public static ApplicationContext getApplicationContext() {
        return context;
    }    
    
    //获取Bean
    public static <T> T getBean(Class<T> clazz){
        return (T) getApplicationContext().getBean(clazz);
    }
    
    public static <T> T getBean(String name){
        return (T) getApplicationContext().getBean(name);
    }    
}