spring boot 启动 开启注解 加载 bean

业务描述：创建一个cache类然后交给spring 管理。

@Component

@Scope("singleton")

public class Cache {

public Cache() {

System.out.println("cache()");

}

@PostConstruct

public void init() {

System.out.println("init()");

}

@PreDestroy

public void destory() {

System.out.println("destory");

}

}

修改sringboot 启动类，进行bean的获取及测试。

package com.cy;

@SpringBootApplication

public class CgbSpringbootApplication implements ApplicationContextAware {

private static AnnotationConfigApplicationContext ctx;

@Override

public void setApplicationContext(ApplicationContext

applicationContext) throws BeansException {

ctx=(AnnotationConfigApplicationContext)applicationContext;

}

public static void main(String[] args) {

SpringApplication.run(CgbSpringbootApplication.class, args);

System.out.println(ctx.getBean("cache"));

System.out.println(ctx.getBean("cache"));

ctx.close();

}

}