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What's inside
- Skill name
java-coding-standards- Description
- None
- License
- MIT
- Instructions
- 135 lines in SKILL.md · view on GitHub
Agent Skills spec issues
- invalid YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14:
- name: missing
- description: missing
Files (1)
- SKILL.md
SKILL.md (first lines)
# Java 编码规范
适用于 Spring Boot 服务中可读、可维护的 Java (17+) 代码的规范。
## 核心原则
* 清晰优于巧妙
* 默认不可变;最小化共享可变状态
* 快速失败并提供有意义的异常
* 一致的命名和包结构
## 命名
```java
// ✅ Classes/Records: PascalCase
public class MarketService {}
public record Money(BigDecimal amount, Currency currency) {}
// ✅ Methods/fields: camelCase
private final MarketRepository marketRepository;
public Market findBySlug(String slug) {}
// ✅ Constants: UPPER_SNAKE_CASE
private static final int MAX_PAGE_SIZE = 100;
```
## 不可变性
```java
// ✅ Favor records and final fields
public record MarketDto(Long id, String name, MarketStatus status) {}
public class Market {
private final Long id;
private final String name;
// getters only, no setters
}
```
## Optional 使用
```java
// ✅ Return Optional from find* methods
Optional<Market> market = marketRepository.findBySlug(slug);
// ✅ Map/flatMap instead of get()
return market
.map(MarketResponse::from)
.orElseThrow(() -> new EntityNotFoundException("Market not found"));
```
## Streams 最佳实践
```java
// ✅ Use streams for transformations, keep pipelines short
List<String> names = markets.stream()
.map(Market::name)
.filter(Objects::nonNull)
.toList();
// ❌ Avoid complex nested streams; prefer loops for clarity
```
## 异常
* 领域错误使用非受检异常;包装技术异常时提供上下文
* 创建特定领域的异常(例如,`MarketNotFoundException`)
* 避免宽泛的 `catch (Exception ex)`,除非在中心位置重新抛出/记录
```java
throw new MarketNotFoundException(slug);
```
## 泛型和类型安全
* 避免原始类型;声明泛型参数
* 对于可复用的工具类,优先使用有界泛型
```java
public <T extends Identifiable> Map<Long, T> indexById(Collection<T> items) { ... }
```
## 项目结构 (Maven/Gradle)
```
src/main/java/com/example/app/
config/
controller/
service/
repository/
domain/
dto/
util/
src/main/resources/
application.yml
src/test/java/... (mirrors main)
```
## 格式化和风格
* 一致地使用 2 或 4 个空格(项目标准)
* 每个文件一个公共顶级类型
* 保持方法简短且专注;提取辅助方法
* 成员顺序:常量、字段、构造函数、公共方法、受保护方法、私有方法
## 需要避免的代码坏味道
* 长参数列表 → 使用 DTO/构建器
* 深度嵌套 → 提前返回
* 魔法数字 → 命名常量
* 静态可变状态 → 优先使用依赖注入
* 静默捕获块 → 记录日志并处理或重新抛出
## 日志记录
```java
private static final Logger log = LoggerFactory.getLogger(MarketService.class);
log.info("fetch_market slug={}", slug);
log.error("failed_fetch_market slug={}", slug, ex);From Luohaothu/everything-codex, MIT.
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Signals
- Stars
- 26
- Forks
- 5
- Open issues
- 0
- Last commit (this folder)
- Feb 5, 2026 (9 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/Luohaothu/everything-codex
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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java-coding-standards skill. Agent Mart. https://agentmart.dev/skills/luohaothu-java-coding-standards (last updated 2026-10-24)