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
 

 1 @Service
 2 public class SearchReceive implements  ApplicationListener<ContextRefreshedEvent> {
 3     @Override
 4     public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
 5         if (contextRefreshedEvent.getApplicationContext().getParent() == null) {//保证只执行一次
 6             //需要执行的方法
 7         }
 8     }
 9 }
10  

方法二：SpringBoot的ApplicationRunner

1 @Component
2 public class JDDRunner implements ApplicationRunner {
3     @Override
4     public void run(ApplicationArguments args) throws Exception {
5         System.out.println(args);
6         System.out.println("这个是测试ApplicationRunner接口");
7     }
8 }
9