Startup Processing Articles | Spring Boot 123

How to Run Startup Logic with CommandLineRunner and ApplicationRunner in Spring Boot

A guide to using CommandLineRunner and ApplicationRunner to run logic exactly once right after a Spring Boot application finishes starting. Covers minimal implementations, execution order with @Order, receiving startup arguments via ApplicationArguments, behavior on exceptions, and how to choose between @PostConstruct and ApplicationReadyEvent, all with practical examples.

2026-07-07