[FIXED] How to enable Spring Boot Live Dev Tools on IntelliJ 2021.2 to rebuild classes after modifications and deploy changes to server?

Issue

This is a tutorial on how to enable Dev Tools project on IntelliJ 2021.2 and observe the changes in code without having to restart the Tomcat server.

Solution

In order to make it work, you need to:

1)Have devtools enable in maven or gradle. In maven it looks like :

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

2)In IntellijIDEA: go in settings(ctrl +alt+s) -> Build,Execution,Deployment -> compiler, check "Build project automatically"

3) Enable option 'allow auto-make to start even if developed application is currently running' in Settings -> Advanced Settings under compiler

You can now restart your intelliJ IDE and start your application.

Answered By - Pawan.Java
Answer Checked By - Mary Flores (JavaFixing Volunteer)