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README.md

Latke

一款以 JSON 为主的 Java Web 框架

English

💡 简介

Latke('lɑ:tkə,土豆饼)是一个简单易用的 Java Web 应用开发框架,包含 MVC、IoC、事件通知、ORM、插件等组件。在实体模型上使用 JSON 贯穿前后端,使应用开发更加快捷。这是 Latke 不同于其他框架的地方,比较适合小型应用的快速开发。

欢迎到 Latke 官方讨论区了解更多。同时也欢迎关注 B3log 开源社区微信公众号 B3log开源

b3logos.jpg

✨ 特性

  • 函数式路由
  • 依赖注入
  • MySQL/H2 ORM
  • 多语言
  • 内存/Redis 缓存
  • 事件机制
  • 插件机制

🗃 案例

  • Demo:简单的 Latke 应用示例
  • Solo:一款小而美的 Java 开源博客系统,专为程序员设计
  • Symphony:一款用 Java 实现的现代化社区(论坛/BBS/社交网络/博客)平台

🛠️ 使用

Maven

<dependency>
    <groupId>org.b3log</groupId>
    <artifactId>latke-core</artifactId>
    <version>${latke.version}</version>
</dependency>

控制器层用法

函数式路由

final Dispatcher.RouterGroup routeGroup = Dispatcher.group();
routeGroup.get("/", helloProcessor::index).
        get("/register", registerProcessor::showRegister).
        post("/register", registerProcessor::register).
        get("/var/{pathVar}", registerProcessor::paraPathVar).
        router().get().post().uri("/greeting").handler(helloProcessor::greeting);

JSON 解析

final JSONObject requestJSON = context.requestJSON();

HTTP 封装

final String remoteAddr = context.remoteAddr();
final String requestURI = context.requestURI();
final Object att = context.attr("name");
final String method = context.method();
context.sendRedirect("https://b3log.org");
final Request request = context.getRequest();
final Response response = context.getResponse();

服务层用法

依赖注入、事务

@Service
public class UserService {

    private static final Logger LOGGER = Logger.getLogger(UserService.class);

    @Inject
    private UserRepository userRepository;

    @Transactional
    public void saveUser(final String name, final int age) {
        final JSONObject user = new JSONObject();
        user.put("name", name);
        user.put("age", age);

        String userId;

        try {
            userId = userRepository.add(user);
        } catch (final RepositoryException e) {
            LOGGER.log(Level.ERROR, "Saves user failed", e);

            // 抛出异常后框架将回滚事务
            throw new IllegalStateException("Saves user failed");
        }

        LOGGER.log(Level.INFO, "Saves a user successfully [userId={0}]", userId);
    }
}

持久层用法

构造 ORM

@Repository
public class UserRepository extends AbstractRepository {

    public UserRepository() {
        super("user");
    }
}

单表 CRUD

public interface Repository {
    String add(final JSONObject jsonObject) throws RepositoryException;
    void update(final String id, final JSONObject jsonObject) throws RepositoryException;
    void remove(final String id) throws RepositoryException;
    void remove(final Query query) throws RepositoryException;
    JSONObject get(final String id) throws RepositoryException;
    long count(final Query query) throws RepositoryException;
}

条件查询

public JSONObject getByName(final String name) throws RepositoryException {
    return getFirst(new Query().setFilter(new PropertyFilter("name", FilterOperator.EQUAL, name)));
}

分页查询

new Query().setPage(1, 50)

按字段排序

new Query().addSort("name", SortDirection.DESCENDING);

仅获取需要字段

new Query().select("name", "age");

原生 SQL

final List<JSONObject> records = select("SELECT * FROM `user` WHERE `name` = ?", name);

📜 文档

🏘️ 社区

📄 授权

Latke 使用 木兰宽松许可证, 第2版 开源协议。

🙏 鸣谢

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一款以 JSON 为主的 Java Web 框架。A Java Web framework based on JSON. spread retract
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