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一款以 JSON 为主的 Java Web 框架
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：
<dependency>
<groupId>org.b3log</groupId>
<artifactId>latke-core</artifactId>
<version>${latke.version}</version>
</dependency>
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();
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);
}
}
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);
Latke 使用 木兰宽松许可证, 第2版 开源协议。
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