Spring项目启动完成后，自动执行一次指定方法

实现方法

方法一：实现ApplicationListener< ContextRefreshedEvent>接口

实现ApplicationListener接口，并实现 onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent)方法
 

@Service
public class SearchReceive implements  ApplicationListener<ContextRefreshedEvent> {
    @Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
        if (contextRefreshedEvent.getApplicationContext().getParent() == null) {//保证只执行一次
            //需要执行的方法
        }
    }
}
 

方法二：SpringBoot的ApplicationRunner

@Component
public class JDDRunner implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println(args);
        System.out.println("这个是测试ApplicationRunner接口");
    }
}