@Component
@Order(1) // 執(zhí)行順序，可選
public class MyApplicationRunner implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        // 這里寫你的啟動(dòng)執(zhí)行邏輯，例如初始化緩存
        // args 可以訪問(wèn)應(yīng)用參數(shù)
    }
}

@Component
@Order(2) // 執(zhí)行順序，可選
public class MyCommandLineRunner implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        // 這里寫你的啟動(dòng)執(zhí)行邏輯
        // args 可以訪問(wèn)命令行原始參數(shù)
    }
}

@Component
public class MyInitBean {
    @Autowired
    private SomeRepository repository; // 假設(shè)的倉(cāng)庫(kù)類，用于數(shù)據(jù)訪問(wèn)
 
    @PostConstruct
    public void init() {
        // 例如，在項(xiàng)目啟動(dòng)時(shí)從數(shù)據(jù)庫(kù)加載數(shù)據(jù)到靜態(tài)變量
        List<SomeData> data = repository.findAll();
        // ... 其他處理邏輯
    }
}

@Component
public class MyInitializingBean implements InitializingBean {
    @Autowired
    private SomeDependency dependency;
 
    @Override
    public void afterPropertiesSet() throws Exception {
        // 確保屬性dependency注入后，再執(zhí)行初始化
        // 你的初始化邏輯
    }
}

@Component
public class MyBeanPostProcessor implements BeanPostProcessor {
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        // 在初始化之前執(zhí)行的邏輯
        System.out.println("Before Initialization: " + beanName);
        return bean; // 返回bean本身或一個(gè)新的bean實(shí)例（可選）
    }
    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        // 在初始化之后執(zhí)行的邏輯
        System.out.println("After Initialization: " + beanName);
        return bean; // 返回bean本身或一個(gè)新的bean實(shí)例（可選）
    }
}

@Component
public class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
 
    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        System.out.println("******************** MyBeanFactoryPostProcessor#postProcessBeanFactory ****************");
        System.out.println("******************** bean的數(shù)量：[{}] ****************", beanFactory.getBeanDefinitionCount());
        BeanDefinition userBeanDef = beanFactory.getBeanDefinition("student");
        // 修改bean definition屬性信息
    }
 
}

@Component
public class MyServletContextListener implements ServletContextListener {
 
    @Override
    public void contextInitialized(ServletContextEvent sce) {
        // 在這里寫Web應(yīng)用啟動(dòng)時(shí)的邏輯
        // 例如，初始化一些Web應(yīng)用級(jí)別的資源
    }
 
    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        // 在這里寫Web應(yīng)用關(guān)閉時(shí)的清理邏輯
    }
}

@Component
public class MyClass {
    static {
        System.out.println("執(zhí)行靜態(tài)代碼塊")
    }
}