Mermaid图表编辑器

classDiagram
    direction TB
    class UserController {
        +UserService userService
        +ResponseEntity getUser(Long id)
        +ResponseEntity createUser(UserDTO dto)
        +ResponseEntity updateUser(Long id, UserDTO dto)
        +ResponseEntity deleteUser(Long id)
    }
    class UserService {
        <<interface>>
        +UserDTO getUserById(Long id)
        +UserDTO createUser(UserDTO dto)
        +UserDTO updateUser(Long id, UserDTO dto)
        +void deleteUser(Long id)
    }
    class UserServiceImpl {
        +UserRepository userRepository
        +UserMapper userMapper
        +getUserById(Long id) UserDTO
        +createUser(UserDTO dto) UserDTO
    }
    class UserRepository {
        <<interface>>
        +extends JpaRepository~User, Long~
        +Optional~User~ findByEmail(String email)
        +List~User~ findByStatus(UserStatus status)
    }
    class User {
        +Long id
        +String username
        +String email
        +String passwordHash
        +UserStatus status
        +Date createdAt
        +boolean isActive()
    }
    class UserDTO {
        +Long id
        +String username
        +String email
        +UserStatus status
    }
    class UserMapper {
        <<interface>>
        +User toEntity(UserDTO dto)
        +UserDTO toDTO(User entity)
        +void updateEntity(UserDTO dto, User entity)
    }
    class UserMapperImpl {
        +User toEntity(UserDTO dto)
        +UserDTO toDTO(User entity)
    }
    UserController --> UserService
    UserService <|.. UserServiceImpl
    UserServiceImpl --> UserRepository
    UserServiceImpl --> UserMapper
    UserRepository ..> User
    UserMapper <|.. UserMapperImpl
    UserMapperImpl ..> User
    UserMapperImpl ..> UserDTO
    UserDTO ..> User
    note for UserController "@RestController
处理HTTP请求"
    note for UserService "业务逻辑接口"
    note for UserServiceImpl "@Service
业务逻辑实现"
    note for UserRepository "@Repository
数据访问层"
    note for User "@Entity
数据库实体"