[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M6EBVCK83JXWRVAPF0XQSD3E":3,"skill-same:01M6EBVCK83JXWRVAPF0XQSD3E":73},{"skillNo":4,"name":5,"nameZh":6,"description":7,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":16,"categories":17,"keywords":18,"publishedAt":39,"linkOnly":40,"markdownContent":41,"markdownBody":42,"frontMatter":43,"refName":44,"commitSha":45,"skillDirectory":46,"forksCount":47,"repositoryHtmlUrl":48,"repositoryHomepageUrl":49,"ownerHtmlUrl":50,"ownerBlogUrl":6,"ownerDescription":51,"updatedAt":52,"install":53,"resources":66},"01M6EBVCK83JXWRVAPF0XQSD3E","spring-boot-best-practices",null,"Core coding standards, dependency injection, and configuration for Spring Boot 3. Use when applying Spring Boot 3 coding standards or configuring dependency injection. (triggers: application.properties, **\u002F*Service.java, autowired, requiredargsconstructor, configuration-properties, slf4j)","ComeOnOliver\u002Fskillshub","ComeOnOliver","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F43215937?v=4","01M6E5JNFECJAAVFE0W7SMWWD2","Haoran Shu","01M6E5JNNDQS7AJZDYFQ8TPZCK",66,"MIT","https:\u002F\u002Fgithub.com\u002FComeOnOliver\u002Fskillshub\u002Fblob\u002Fmain\u002Fskills\u002FHoangNguyen0403\u002Fagent-skills-standard\u002Fspring-boot-best-practices\u002FSKILL.md",[],[19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"best practices","spring boot best practices","spring boot","spring","boot","dependency","spring boot 3","triggers","service","dependency injection","application","configuration","properties","standards","use","coding","injection","java","coding standards","core","2026-11-10 10:12:30",false,"---\nname: spring-boot-best-practices\ndescription: 'Core coding standards, dependency injection, and configuration for Spring Boot 3. Use when applying Spring Boot 3 coding standards or configuring dependency injection. (triggers: application.properties, **\u002F*Service.java, autowired, requiredargsconstructor, configuration-properties, slf4j)'\n---\n\n# Spring Boot Best Practices\n\n## **Priority: P0**\n\n## Implementation Guidelines\n\n### Dependency Injection (DI)\n\n- **Constructor Injection**: ALWAYS use **Constructor Injection** for immutability. Use **`@RequiredArgsConstructor`** (Lombok) to reduce boilerplate. Mark all dependencies as **`final`**.\n- **Avoid @Autowired**: NEVER use field injection. It prevents unit testing without Spring context and hides dependencies.\n\n### Configuration & Data\n\n- **Type-Safe Config**: Use `@ConfigurationProperties` with Records (Java 17+) instead of `@Value`. Use Spring profile-specific files (e.g., `application-dev.yml`, `application-prod.yml`) and set active profile via `SPRING_PROFILES_ACTIVE`. Never hardcode secret values in properties files.\n- **Validation**: Combine with **`@Validated`** and **Jakarta Bean Validation** (`@NotNull`, `@NotEmpty`) to fail fast at startup. Use **`application.yaml`** for structured configuration.\n- **DTOs**: Use **`records`** as immutable **DTOs** to reduce boilerplate and ensure thread safety. Handle empty values with **`Optional`** to avoid `NullPointerException`.\n\n### Observability & Quality\n\n- **Error Handling**: Implement **`@ControllerAdvice`** and **`ProblemDetails` (RFC 7807)** for standardized error responses.\n- **Logging**: Use **`SLF4J`** with **`@Slf4j`**. Implement **Structured Logging** by logging arguments (`log.info(\"id: {}\", id)`).\n- **Tooling**: Mandate **`Spotless`** or **`Checkstyle`** for code formatting. Use **`sdkman`** to manage JDK 21+ versions.\n\n## Anti-Patterns\n\n- **No @Autowired on fields**: Use constructor injection via @RequiredArgsConstructor.\n- **No Setters on dependencies**: Declare all injected fields as final.\n- **No context.getBean()**: Inject dependencies via constructor DI.\n- **No log-and-swallow**: Rethrow or handle exceptions explicitly.\n\n## References\n\n- [Implementation Examples](references\u002Fimplementation.md)\n\n","# Spring Boot Best Practices\n\n## **Priority: P0**\n\n## Implementation Guidelines\n\n### Dependency Injection (DI)\n\n- **Constructor Injection**: ALWAYS use **Constructor Injection** for immutability. Use **`@RequiredArgsConstructor`** (Lombok) to reduce boilerplate. Mark all dependencies as **`final`**.\n- **Avoid @Autowired**: NEVER use field injection. 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Implement **Structured Logging** by logging arguments (`log.info(\"id: {}\", id)`).\n- **Tooling**: Mandate **`Spotless`** or **`Checkstyle`** for code formatting. 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