SpringBoot的事件监听

事件监听

package com.example.springboot_listener.listener;

import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.stereotype.Component;

@Component
public class MyApplicationContextInitializer implements ApplicationContextInitializer {
    @Override
    public void initialize(ConfigurableApplicationContext applicationContext) {
        System.out.println("ApplicationContextInitializer......");
    }
}

package com.example.springboot_listener.listener;

import org.springframework.boot.ConfigurableBootstrapContext;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.SpringApplicationRunListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.ConfigurableEnvironment;

import java.time.Duration;

public class MySpringApplicationRunListener implements SpringApplicationRunListener {
    public MySpringApplicationRunListener(SpringApplication application,String[] args) {
    }

    @Override
    public void starting(ConfigurableBootstrapContext bootstrapContext) {
        System.out.println("项目启动中");
    }

    @Override
    public void environmentPrepared(ConfigurableBootstrapContext bootstrapContext, ConfigurableEnvironment environment) {
        System.out.println("environment....环境对象开始准备");
    }

    @Override
    public void contextPrepared(ConfigurableApplicationContext context) {
        System.out.println("上下文对象开始准备");
    }

    @Override
    public void contextLoaded(ConfigurableApplicationContext context) {
        System.out.println("上下文对象开始加载");
    }

    @Override
    public void started(ConfigurableApplicationContext context, Duration timeTaken) {
        System.out.println("上下文对象加载完成");
    }

    @Override
    public void started(ConfigurableApplicationContext context) {
        SpringApplicationRunListener.super.started(context);
    }

    @Override
    public void ready(ConfigurableApplicationContext context, Duration timeTaken) {
        System.out.println("上下文加载完成");
    }

    @Override
    public void running(ConfigurableApplicationContext context) {
        System.out.println("项目启动完成，开始运行");
    }

    @Override
    public void failed(ConfigurableApplicationContext context, Throwable exception) {
        System.out.println("项目启动失败");
    }
}

package com.example.springboot_listener.listener;

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

import java.util.Arrays;

@Component
public class MyCommandLineRunner implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        System.out.println("CommandLineRunner..........");
        System.out.println(Arrays.asList(args));
    }
}

package com.example.springboot_listener.listener;

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

import java.util.Arrays;

//当项目启动后执行run方法
@Component
public class MyApplicationRunner implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println("ApplicationRunner...........");
        System.out.println(Arrays.asList(args.getSourceArgs()));
    }
}

最后运行启动类