【Spring Boot】Spring Boot之五种容器启动后进行相关应用初始化操作方法

一、方式一，使用ApplicationListener<E extends ApplicationEvent>监听ContextRefreshedEvent事件

/**
 * @author zhangboqing
 * @date 2019-11-03
 */
@Component
public class MyApplicationListener implements ApplicationListener<ContextRefreshedEvent> {
    @Autowired
    private MyService myService;

    @Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
        System.out.println(">>>>>>>>>>>>>> ApplicationListener:" + myService.sayHello());
    }
}

二、方式二，使用SmartInitializingSingleton

/**
 * @author zhangboqing
 * @date 2019-11-03
 */
@Component
public class MySmartInitializingSingleton implements SmartInitializingSingleton {
    @Autowired
    private MyService myService;

    @Override
    public void afterSingletonsInstantiated() {
        System.out.println(">>>>>>>>>>>>>> SmartInitializingSingleton:" + myService.sayHello());
    }
}

三、方式三，使用SmartLifecycle

/**
 * @author zhangboqing
 * @date 2019-11-03
 */
@Component
public class MySmartLifecycle implements SmartLifecycle {

    @Autowired
    private MyService myService;

    @Override
    public void start() {
        System.out.println(">>>>>>>>>>>>>> SmartLifecycle:" + myService.sayHello());
    }

    @Override
    public boolean isAutoStartup() {
        return true;
    }

    @Override
    public void stop(Runnable callback) {

    }

    @Override
    public void stop() {

    }

    @Override
    public boolean isRunning() {
        return false;
    }

    @Override
    public int getPhase() {
        return 0;
    }
}

四、方式四，使用ApplicationRunner

/**
 * @author zhangboqing
 * @date 2019-11-07
 */
@Component
public class MyApplicationRunner implements ApplicationRunner {
    @Autowired
    private MyService myService;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println(">>>>>>>>>>>>>> ApplicationRunner:" + myService.sayHello());
    }
}

五、方式五，使用CommandLineRunner

/**
 * @author zhangboqing
 * @date 2019-11-07
 */
@Component
public class MyCommandLineRunner implements CommandLineRunner {

    @Autowired
    private MyService myService;

    @Override
    public void run(String... args) throws Exception {
        System.out.println(">>>>>>>>>>>>>> CommandLineRunner:" + myService.sayHello());
    }
}