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Java Development Manual

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Java Development Manual — database management tool with MySQL support.

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About This Skill

Content available in Chinese

# Java开发手册(嵩山版)

概述

本手册基于阿里巴巴Java开发手册(嵩山版),将规约分为7个维度。规约按约束力强弱分为:

| 级别 | 含义 | 说明 | |------|------|------| | 【强制】 | 必须遵守 | 违反可能导致严重问题 | | 【推荐】 | 建议遵守 | 提升代码质量和可维护性 | | 【参考】 | 可选择性采纳 | 根据实际情况判断 |

章节导航

根据需求选择对应章节的详细规约:

| 章节 | 适用场景 | 详细文档 | |------|---------|----------| | 编程规约 | 命名、格式、OOP、并发、集合处理 | coding-convention.md | | 异常日志 | 错误码、异常处理、日志规范 | exception-log.md | | 单元测试 | 测试用例、覆盖率、Mock | unit-test.md | | 安全规约 | SQL注入、XSS、CSRF、脱敏 | security.md | | MySQL数据库 | 建表、索引、SQL、ORM | mysql.md | | 工程结构 | 分层架构、依赖管理、服务器 | project-structure.md | | 设计规约 | UML、设计模式、设计原则 | design.md |

快速参考

命名规范速查

```java // 类名:UpperCamelCase public class UserService { } public class UserDO { } // DO/DTO/VO例外

// 方法名/变量:lowerCamelCase private String userName; public void getUserById() { }

// 常量:全大写+下划线 public static final int MAX_RETRY_COUNT = 3;

// 包名:全小写 package com.company.project.service; ```

禁止事项速查

| 禁止 | 原因 | |------|------| | 拼音命名 | 可读性差 | | 魔法值 | 难以维护 | | `SELECT *` | 性能和可维护性 | | Executors创建线程池 | 可能OOM | | 字符串拼接SQL | 注入风险 | | finally中return | 丢失try返回值 | | foreach中remove | ConcurrentModificationException |

必须事项速查

| 必须 | 原因 | |------|------| | 覆写方法加@Override | 避免签名错误 | | 表必备三字段 | id, create_time, update_time | | 敏感数据脱敏 | 隐私保护 | | 参数校验 | 安全防护 | | ThreadLocal回收 | 避免内存泄漏 | | 日志用占位符 | 性能优化 |

异常处理速查

```java // 正确的异常处理 try { // 业务逻辑 } catch (SpecificException e) { logger.error("操作失败, 参数: {}", params, e); throw new BusinessException("用户友好提示", e); } finally { // 资源关闭(JDK7+ try-with-resources) } ```

数据库速查

```sql -- 建表必备 CREATE TABLE example ( `id` bigint unsigned NOT NULL AUTO_INCREMENT, `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- 索引命名 -- 主键: pk_字段名 -- 唯一: uk_字段名 -- 普通: idx_字段名 ```

并发处理速查

```java // 线程池创建 ThreadPoolExecutor executor = new ThreadPoolExecutor( corePoolSize, maximumPoolSize, keepAliveTime, TimeUnit.SECONDS, new LinkedBlockingQueue<>(queueCapacity), new ThreadFactory() { private AtomicInteger counter = new AtomicInteger(1); public Thread newThread(Runnable r) { return new Thread(r, "worker-" + counter.getAndIncrement()); } }, new ThreadPoolExecutor.CallerRunsPolicy() );

// ThreadLocal使用 try { threadLocal.set(value); // 业务逻辑 } finally { threadLocal.remove(); // 必须回收 } ```

使用指南

代码审查场景

  1. 命名检查 → 查看 coding-convention.md 的"命名风格"章节
  2. 并发问题 → 查看 coding-convention.md 的"并发处理"章节
  3. 异常处理 → 查看 exception-log.md
  4. 安全问题 → 查看 security.md

新项目搭建场景

  1. 架构设计 → 查看 design.md
  2. 分层结构 → 查看 project-structure.md
  3. 数据库设计 → 查看 mysql.md
  4. 单元测试 → 查看 unit-test.md

问题排查场景

  1. NPE问题 → 查看 exception-log.md 的"NPE防护"
  2. 性能问题 → 查看 mysql.md 的"索引规约"
  3. 并发问题 → 查看 coding-convention.md 的"并发处理"

Use Cases

  • Reference Java development best practices and coding standards
  • Implement MySQL database operations following Java conventions
  • Follow structured Java development patterns for enterprise applications
  • Apply database design principles in Java application development
  • Consult Java development guidelines for consistent team coding practices

Pros & Cons

Pros

  • +Compatible with multiple platforms including claude-code, openclaw
  • +Well-documented with detailed usage instructions and examples
  • +Purpose-built for database tasks with focused functionality

Cons

  • -Documentation primarily in Chinese — may be less accessible for English-only users
  • -No built-in analytics or usage metrics dashboard

FAQ

What does Java Development Manual do?
Java Development Manual — database management tool with MySQL support.
What platforms support Java Development Manual?
Java Development Manual is available on Claude Code, OpenClaw.
What are the use cases for Java Development Manual?
Reference Java development best practices and coding standards. Implement MySQL database operations following Java conventions. Follow structured Java development patterns for enterprise applications.

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