Spring Boot implements embedded servers by providing a lightweight, embedded version of popular web servers (such as Tomcat, Jetty, or Undertow) directly within the application. This allows the application to run as a standalone executable JAR or WAR file without needing to deploy to an external server.

  • Auto-configuration: When you include a web server dependency in the classpath (e.g., spring-boot-starter-web), Spring Boot automatically configures and starts the embedded server.
  • No external setup: The server is bundled within the application, making deployment and execution simpler.
  • Customizable: You can configure server properties such as port, context path, etc., using application properties or programmatically.

In summary, Spring Boot simplifies server setup by embedding a web server within the application, allowing it to run independently without an external servlet container.