Apr 13, 2026 · Backend Development

Understanding SpringBoot Startup: From main() to Web Container Initialization

This article walks through the complete SpringBoot startup sequence, starting with the main method annotated with @SpringBootApplication, detailing the creation of SpringApplication, environment preparation, context initialization, bean loading, embedded web server setup, event publishing, and final readiness, with code examples and common pitfalls.

EmbeddedTomcatEventDrivenSpringApplication

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Understanding SpringBoot Startup: From main() to Web Container Initialization

Top Architect

Aug 22, 2021 · Backend Development

Embedding Tomcat in a Spring Boot Application: A Step‑by‑Step Tutorial

This article explains how to discover the built‑in Tomcat dependency in a SpringBoot project, add the appropriate Maven dependency, create a servlet, configure an embedded Tomcat programmatically with Java, and run the application without any external web.xml or server installation.

EmbeddedTomcatJavaSpringBoot

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Embedding Tomcat in a Spring Boot Application: A Step‑by‑Step Tutorial