Spring項目啟動完成后，自動執行一次指定方法

實現方法

方法一：實現ApplicationListener< ContextRefreshedEvent>接口

實現ApplicationListener接口，並實現 onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent)方法
 

@Service
public class SearchReceive implements  ApplicationListener<ContextRefreshedEvent> {
    @Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
        if (contextRefreshedEvent.getApplicationContext().getParent() == null) {//保證只執行一次
            //需要執行的方法
        }
    }
}
 

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("這個是測試ApplicationRunner接口");
    }
}