说明

  • 场景：在 SpringBoot 应用启动后执行某些操作
  • 以下提供 3 种方式，监听 SpringBoot 应用启动

方案一

ApplicationListener<ApplicationReadyEvent>

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import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;

@Component
public class ApplicationEventListener implements ApplicationListener<ApplicationReadyEvent> {

    @Override
    public void onApplicationEvent(ApplicationReadyEvent event) {
        System.out.println("Application is now ready and running.");
    }
}

方案二

@EventListener & ApplicationReadyEvent

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package com.neo.controller;

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

@Component
public class XXX {
  
    @EventListener
    public void handleApplicationReadyEvent(ApplicationReadyEvent event) {
        System.out.println("Handling application ready event.");
    }
}

方案三

CommandLineRunner

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

@Component
@Order(1)
public class MyCommandLineRunner implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        // 在这里编写你需要执行的代码
        System.out.println("Application started...");
    }
}