multi-module-maven

# Multi-Module Maven ## Typical Structure ``` my-app/ ├── pom.xml ← Parent POM (packaging = pom) ├── my-app-domain/ ← Pure Java domain — no Spring │ └── pom.xml ├── my-app-application/ ← Use cases — depends on domain │ └── pom.xml ├── my-app-infrastructure/ ← JPA, Redis, HTTP clients │ └── pom.xml └── my-app-web/ ← Spring Boot app, REST — depends on all above └── pom.xml ``` ## Parent POM ```xml <!-- pom.xml (parent) --> <project> <groupId>com.example</groupId> <artifactId>my-app</artifactId> <version>1.0.0-SNAPSHOT</version> <packaging>pom</packaging> <modules> <module>my-app-domain</module> <module>my-app-application</module> <module>my-app-infrastructure</module> <module>my-app-web</module> </modules> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>4.1.0</version> </parent> <!-- Shared versions — all modules inherit --> <properties> <java.version>21</java.version> <mapstruct.version>1.6.3</mapstruct.version> </properties> <!-- Dependency management — centralizes versions, NOT adding to classpath --> <dependencyManagement> <dependencies> <!-- Inter-module dependencies --> <dependency> <groupId>com.example</groupId> <artifactId>my-app-domain</artifactId> ...