SpringBoot run code on startup

In the spring  the actual development boot project, we sometimes need to load some data item or service to start in advance to complete certain actions. To solve this problem, Spring boot provides us with a method: to achieve this demand by implementing the interface CommandLineRunner.

Implementation: only one class without the need of additional configuration. 

Implementation steps:

1. Create a class that implements the interface CommandLineRunner of MyStartupRunnerTest

1. package com.energy;  
2.   
3. import org.springframework.boot.CommandLineRunner;  
4. import org.springframework.core.annotation.Order;  
5. import org.springframework.stereotype.Component;  
6.   
7. /** 
8.  * Created by CavanLiu on 2017/2/28 0028. 
9.  */  
10. @Component  
11. @Order(value=1)
12. public class MyStartupRunnerTest implements CommandLineRunner  
13. {  
14.     @Override  
15.     public void run(String... args) throws Exception  
16.     {  
17.         System.out.println(">>>>This is MyStartupRunnerTest Order=1. Only testing CommandLineRunner...<<<<");  
18.     }  
19. }