SpringBoot初始化时Do something的六种实现

最新推荐文章于 2024-01-09 16:12:33 发布

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最新推荐文章于 2024-01-09 16:12:33 发布

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本文详细介绍了在SpringBoot中实现启动时初始化的六种方法，包括@PostConstruct注解、@Bean的initMethod、实现InitializingBean接口、使用CommandLineRunner和ApplicationRunner接口，以及监听ContextRefreshedEvent事件。每种方式的示例代码清晰展示了其用法和初始化顺序。了解这些方法有助于优化SpringBoot应用的启动流程。

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SpringBoot初始化时Do something的六种实现

一，使用注解@PostConstruct

@Component
public class TestPostConstruct {
    @PostConstruct
    private void init(){
        System.out.println("-----------------PostConstruct初始化启动成功-----------------");
    }
}

二，使用注解@Bean(initMethod="")

@Configuration
public class TestBean {

    @Bean(initMethod = "init")
    public TestB testB(){
        return new TestB();
    }
    class TestB{
        private void init(){
            System.out.println("-----------------Bean初始化启动成功-----------------");
        }
    }
}

三，实现InitializingBean

@Component
public class TestInitializingBean implements InitializingBean {
    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("-----------------InitializingBean初始化启动成功-----------------");
    }
}

四，实现CommandLineRunner

@Component
public class TestCommandLineRunner implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        System.out.println("-----------------CommandLineRunner初始化启动成功-----------------");
    }
}

五，实现ApplicationRunner

@Component
public class TestApplicationRunner implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println("-----------------ApplicationRunner初始化启动成功-----------------");
    }
}

六，实现ApplicationListener

@Component
public class TestApplicationListener implements ApplicationListener<ContextRefreshedEvent> {
    @Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
        System.out.println("-----------------ApplicationListener初始化启动成功-----------------");
    }
}