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

Question

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.

Answer 1

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 IntelliJ IDEA: go to 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.

Answer 2

1.file->settings->Build,Execution,Deployment->compiler->click->Build project automatically->apply->ok

2.

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

3.file->settings->advance option->allow auto make start even if developed application in currently running->apply->ok

4.restart IDE