java✓ تایید شده

محتوای SKILL.md

---
name: java
description: 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.
---

# 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

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

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

3) 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).

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

5) 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.

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

7) 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.

مجوز

مجوز اعلام‌شده: MIT

MIT License

Copyright (c) 2026 majiayu000

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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