What is Spring Boot DevTools and what does it do during development? स्प्रिंग बूट डेवटूल्स क्या है और यह डेवलपमेंट के दौरान क्या करता है?

Spring Boot DevTools is a development-time dependency that improves the development workflow through automatic application restarts when code on the classpath changes, LiveReload browser refresh support, and sensible development-time property defaults such as disabled template caching.

Restarts triggered by DevTools use two classloaders so only the changed classes are reloaded, making restarts much faster than a full JVM restart. DevTools is automatically excluded from a production build when packaged with Maven or Gradle, so it never ships to production by default.

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-devtools</artifactId>
  <optional>true</optional>
</dependency>