Spring Boot DevTools

Maven Dependency

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

Overview

Spring Boot DEV Tools are additional set of tools that can make the application development experience a little more pleasant:

Application automatically restart whenever files on the classpath change (in IntelliJ IDEA you can just Recompile '.java' or Build Project in Build top menu).
Starts embedded LiveReload server that can be used to trigger a browser refresh when a resource is changed.
Disable caching options by default, so changes can be seen immediately.
You can configure global DEV Tools settings by adding a file named .spring-boot-devtools.properties to your ${HOME} folder. Any properties added to this file will apply to all Spring Boot applications on your machine that use DEV Tools.

IntelliJ IDEA Ultimate Edition

By enabling Modify Options On 'Update' Action / On frame deactivation Update classes and resources in Run/Debug Configurations you can trigger automatic restart of application during these events when using DevTools.