How to Execute Code After Spring Boot Application Startup?

Executing Code at Spring Boot Launch Time

Question:

How can I run code after my Spring Boot application has started up? I've attempted to initiate a new thread, but the required @Autowired services are not yet initialized at that time. I've also discovered the ApplicationPreparedEvent, which triggers before the annotations are set. Is there a more appropriate event or method for executing code once the application is ready to receive HTTP requests?

Answer:

An effective solution to this problem is to utilize the ApplicationReadyEvent:

<code class="java">@EventListener(ApplicationReadyEvent.class)
public void doSomethingAfterStartup() {
    System.out.println("hello world, I have just started up");
}</code>

When tested with Spring Boot version 1.5.1.RELEASE, it was successfully tested and functioned after start-up. This method allows you to execute code once the application is fully initialized and ready to handle HTTP requests.

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