java-spring

NullAway is a static analysis tool integrated into Gradle builds that detects potential null pointer exceptions in Java Spring Boot projects. Enable it by adding the NullAway plugin to your Gradle configuration, annotate nullable fields with @Nullable, and run gradle build to surface violations before runtime.

JUnit 5 paired with Mockito provides a test strategy for Spring Boot REST APIs: use @SpringBootTest for integration tests, @ExtendWith(MockitoExtension.class) for unit tests, mock repository and service layers with @Mock, and inject mocks via @InjectMocks to isolate components and verify behavior.

Spring Security with JWT secures REST APIs by validating token-based authentication. Configure Spring Security filters to intercept requests, validate JWT tokens, and extract user claims. Add security dependencies to Gradle, define authentication entry points, and apply filters to your controller endpoints.

Flyway integrates with Spring Boot to automate database schema versioning and migrations. Spring Data JPA handles entity mapping to migrated tables. Configure Flyway locations in application properties, place SQL or Java migration files in src/main/resources/db/migration, and Spring Boot executes them on startup.

Google Java Style is a code formatting and naming standard for Java projects. Error Prone is a static analysis compiler plugin that detects common mistakes and style violations. Together in a Gradle build, they enforce consistent code quality, catch bugs at compile time, and ensure readability across Spring Boot projects.

MapStruct generates type-safe bean mappers at compile time using annotation processing. Add MapStruct and the annotation processor to Gradle dependencies, define mapper interfaces with @Mapper, and Gradle's annotation processing generates implementations to transform DTOs and entities in Spring services.