Enabling SpringBoot DevTools, Lombok, and Configuration Processor for Hot Reload and Code Simplification

SpringBoot DevTools provides hot deployment capabilities; you can enable it by selecting the appropriate option when creating a project or by adding the following Maven dependency:

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

In IntelliJ IDEA, after modifying code you can press Ctrl+F9 to recompile, while Eclipse recompiles automatically on Ctrl+S . To achieve automatic recompilation on every change, enable the relevant checkboxes in IDEA settings as shown in the screenshots.

Lombok simplifies JavaBean development by generating constructors, getters, setters, and other boilerplate code. Add Lombok to a project by selecting it during initialization or by adding this Maven dependency:

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

Install the Lombok plugin in IDEA to enable annotation processing. Example usage includes annotations like @AllArgsConstructor, @NoArgsConstructor, and @Data on a class definition.

The Spring Configuration Processor assists with metadata generation for @ConfigurationProperties classes. Although its impact is modest, you can add it via this dependency:

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

To prevent the processor from being packaged into the final JAR and reduce size, exclude it in the Maven build section as follows:

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <excludes>
                    <exclude>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-configuration-processor</artifactId>
                    </exclude>
                </excludes>
            </configuration>
        </plugin>
    </plugins>
</build>

By following these steps—adding the appropriate dependencies, configuring IDE settings, and adjusting the Maven build—you can enable hot reload, reduce boilerplate with Lombok, and obtain property metadata assistance in SpringBoot applications.