@Component
public class User {
@PostConstruct
public void init(){
System.out.println("执行init_method");
}
}
public static void main(String[] args) {
ApplicationContext annotationConfigApplicationContext = new AnnotationConfigApplicationContext("com.java12.spring.annotation");
User user = (User) annotationConfigApplicationContext.getBean("user");
System.out.println(user);
}
AnnotationConfigApplicationContext这个类可以扫面指定的包 和 类,然后我们就可以从中获得spring容器里面的bean