springboot的时间监听机制

小灰灰 2022-05-12 09:14 155阅读 0赞

配置在META-INF/spring.factories

ApplicationContextInitializer

public class HelloApplicationContextInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
        @Override
        public void initialize(ConfigurableApplicationContext applicationContext) {
            System.out.println("ApplicationContextInitializer...initialize..."+applicationContext);
        }
    }

SpringApplicationRunListener

public class HelloSpringApplicationRunListener implements SpringApplicationRunListener {
    
        //必须有的构造器
        public HelloSpringApplicationRunListener(SpringApplication application, String[] args){
    
        }
    
        @Override
        public void starting() {
            System.out.println("SpringApplicationRunListener...starting...");
        }
    
        @Override
        public void environmentPrepared(ConfigurableEnvironment environment) {
            Object o = environment.getSystemProperties().get("os.name");
            System.out.println("SpringApplicationRunListener...environmentPrepared.."+o);
        }
    
        @Override
        public void contextPrepared(ConfigurableApplicationContext context) {
            System.out.println("SpringApplicationRunListener...contextPrepared...");
        }
    
        @Override
        public void contextLoaded(ConfigurableApplicationContext context) {
            System.out.println("SpringApplicationRunListener...contextLoaded...");
        }
    
        @Override
        public void finished(ConfigurableApplicationContext context, Throwable exception) {
            System.out.println("SpringApplicationRunListener...finished...");
        }
    }

配置(META-INF/spring.factories)

org.springframework.context.ApplicationContextInitializer=\
    com.atguigu.springboot.listener.HelloApplicationContextInitializer
    org.springframework.boot.SpringApplicationRunListener=\
    com.atguigu.springboot.listener.HelloSpringApplicationRunListener

只需要放在ioc容器中

ApplicationRunner

@Component
    public class HelloApplicationRunner implements ApplicationRunner {
        @Override
        public void run(ApplicationArguments args) throws Exception {
            System.out.println("ApplicationRunner...run....");
        }
    }

CommandLineRunner

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