Spring Boot DevTools, Lombok, and Configuration Processor: Setup and Usage Guide

The author, a senior architect, shares practical steps to improve Spring Boot development by enabling hot deployment, reducing boilerplate with Lombok, and adding the Spring Configuration Processor for property metadata.

Spring Boot DevTools provides hot‑deployment capabilities. It can be enabled either by selecting the DevTools option when creating a new Spring Boot 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 press Ctrl+F9 to recompile; in Eclipse, saving ( Ctrl+S ) triggers automatic compilation.

To achieve automatic recompilation without manual shortcuts, the author lists three IDEA settings steps (screenshots omitted) and shows how to place the cursor after the <build> tag and press Alt+Shift+Ctrl+/ to generate the necessary configuration.

Lombok simplifies Java bean development by generating constructors, getters, setters, and other boilerplate. Add the following Maven dependency to use Lombok:

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

After adding the dependency, install the Lombok plugin in IDEA. Example usage of Lombok annotations:

@AllArgsConstructor // all‑args constructor @NoArgsConstructor // no‑args constructor @Data // getter + setter public class User { private Long id; private String name; private Integer age; private String email; }

Spring Configuration Processor provides metadata for @ConfigurationProperties classes, enabling IDE assistance. Add the dependency:

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

To avoid packaging the processor in the final JAR, exclude it in the Maven <build> section:

<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>

The article concludes by inviting readers to discuss the techniques, ask questions, and join the author's community, while also promoting related ChatGPT services and other resources.