import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

@Component
public class MyCommandLineRunner implements CommandLineRunner {
    
    @Override
    public void run(String... args) throws Exception {
        System.out.println("應(yīng)用啟動(dòng)后執(zhí)行 - CommandLineRunner");
        // 可以在這里訪問(wèn)Spring容器中的Bean
    }
}

import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;

@Component
public class MyApplicationRunner implements ApplicationRunner {
    
    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println("應(yīng)用啟動(dòng)后執(zhí)行 - ApplicationRunner");
        // 可以訪問(wèn)命令行參數(shù)
        if (args.containsOption("debug")) {
            System.out.println("Debug模式已啟用");
        }
    }
}

@Component
@Order(1)  // 數(shù)字越小，優(yōu)先級(jí)越高
public class FirstRunner implements CommandLineRunner {
    @Override
    public void run(String... args) {
        System.out.println("第一個(gè)Runner執(zhí)行");
    }
}

@Component
@Order(2)
public class SecondRunner implements CommandLineRunner {
    @Override
    public void run(String... args) {
        System.out.println("第二個(gè)Runner執(zhí)行");
    }
}

import javax.annotation.PostConstruct;
import org.springframework.stereotype.Component;

@Component
public class MyPostConstructBean {
    
    @PostConstruct
    public void init() {
        System.out.println("Bean初始化后執(zhí)行 - @PostConstruct");
        // 可以在這里執(zhí)行初始化邏輯
    }
}

import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;

@Component
public class MyApplicationListener implements ApplicationListener<ApplicationReadyEvent> {
    
    @Override
    public void onApplicationEvent(ApplicationReadyEvent event) {
        System.out.println("應(yīng)用完全啟動(dòng)后執(zhí)行 - ApplicationReadyEvent");
        // 可以在這里執(zhí)行應(yīng)用啟動(dòng)后的邏輯
    }
}

import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;

@Component
public class MyInitializingBean implements InitializingBean {
    
    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("Bean屬性設(shè)置后執(zhí)行 - InitializingBean");
        // 可以在這里執(zhí)行初始化邏輯
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MyApplication {
    public static void main(String[] args) {
        System.out.println("Spring Boot啟動(dòng)前執(zhí)行");
        
        SpringApplication.run(MyApplication.class, args);
        
        System.out.println("Spring Boot啟動(dòng)過(guò)程完成后執(zhí)行");
        // 注意：這里的代碼會(huì)在Spring Boot啟動(dòng)后立即執(zhí)行，但不一定是所有Bean都初始化完成
    }
}