Boost Spring Boot 3.x Compatibility with mica-auto Auto-Generated Starter Configs

1. Introduction

Many open‑source developers create separate branches to keep their starters compatible with Spring Boot 3.x, but this is unnecessary if you avoid the renamed JARs. Using mica-auto can save maintenance and publishing time, giving you more freedom to spend with family and friends.

2. Overview

mica-auto (a Spring Boot starter development tool) generates Spring Boot starter configuration files. It uses an Annotation Processor to scan @Component at compile time and automatically produce the corresponding configuration. mica-auto supports composite annotations and is widely used in the mica, mica‑mqtt, pig, and SpringBlade ecosystems.

3. Features

Automatically generates spring.factories during compilation.

Automatically generates the Spring Boot 3.x AutoConfiguration.imports SPI configuration.

Automatically generates spring-devtools.properties during compilation.

Automatically generates Java SPI configuration, requiring the @AutoService annotation.

4. Usage

Note:

If your project uses Lombok, place the mica-auto dependency after the Lombok dependency.

Maven

<dependency>
  <groupId>net.dreamlu</groupId>
  <artifactId>mica-auto</artifactId>
  <version>2.3.3</version>
  <scope>provided</scope>
</dependency>

Gradle >= 5.x

annotationProcessor("net.dreamlu:mica-auto:2.3.3")

Gradle < 5.x

compileOnly "net.dreamlu:mica-auto:2.3.3"

5. Result

6. Conclusion

mica-auto simultaneously generates spring.factories and the 3.x AutoConfiguration.imports SPI configuration. Both can coexist without conflict, allowing existing starters to be compatible with Spring Boot 3.x without branching or maintaining multiple packages.

To better support Spring Boot 3.2.x, you may also need to add the -parameters compilation flag:

Maven configuration for this flag is shown in the following image:

Using mica-auto to auto‑generate Spring Boot starter configurations frees your hands, prevents missing or incorrect settings, and reduces startup failures. Give it a try today!