Claude-skill-registry java

Build, review, and refactor Java backend services (Spring Boot). Use for tasks like REST API design, controllers/services/repositories, PostgreSQL persistence (JPA/MyBatis), migrations, configuration, security (Spring Security), observability, testing, performance tuning, and production hardening.

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/java" ~/.claude/skills/majiayu000-claude-skill-registry-java && rm -rf "$T"

manifest: skills/data/java/SKILL.md

java

Use this skill for Java 后端服务（通常 Spring Boot）开发与评审。

Defaults (unless repo dictates otherwise)

Framework: Spring Boot
Build: Maven or Gradle (follow repo)
API: REST + JSON, explicit DTOs
DB: PostgreSQL, migrations via Flyway/Liquibase if present

Recommended structure

```
controller/
```
：HTTP layer（request/response DTO、参数校验、错误码映射）
```
service/
```
：业务编排与事务边界（domain logic orchestration）
```
repository/
```
：持久化（JPA repository / MyBatis mapper）
```
domain/
```
：领域模型（实体、值对象、聚合根）
```
config/
```
：配置（Web/Security/Serialization）
```
integration/
```
：第三方调用（HTTP clients, MQ）
```
common/
```
：通用工具（logging, id, time, error）
```
test/
```
：单测/集成测试

Workflow

Clarify contract

Endpoint list, auth requirements, error codes, id format.
Consistency with existing API versioning (
```
/v1/...
```
) and response envelope.

API design & validation

Use DTOs; do not expose entities directly.
Bean Validation (
```
@Valid
```
,
```
@NotNull
```
, etc.) for input.
Standardize error responses (code/message/details).

Persistence & migrations

Define schema and migration scripts (Flyway/Liquibase).
Add indexes for query paths; ensure constraints align with requirements.
Avoid N+1 queries (fetch joins, batch sizes, projections).

Transactions & consistency

Define transaction boundaries at service layer (
```
@Transactional
```
).
Keep read-only transactions where possible.
Idempotency for write endpoints when needed.

Security

Spring Security: authentication (JWT/session), authorization (roles/scopes).
Secrets via env/config server; never commit credentials.
Safe logging (no PII), rate limiting if required.

Observability

Structured logs with correlation/request IDs.
Metrics (latency, error rate, DB timings); tracing if available.

Testing

Unit tests for services and domain logic.
Integration tests for repositories and controllers (Testcontainers if used).
Keep tests deterministic and fast.

Output expectations when making changes

Keep diffs localized; avoid broad refactors unless requested.
Update DTOs/migrations/tests together.
Document new config/env vars and run steps.