类图

classDiagram
  class Student {
    - studentId: String
    - name: String
    - birthDate: Date
    - gender: String
    - className: Class
    + displayInfo(): void
  }

  class Course {
    - courseId: String
    - courseName: String
    - teacher: Teacher
    - credits: int
  }

  class Teacher {
    - teacherName: String
    - teacherId: String
    + displayInfo(): void
  }

  class StudentRepository {
    + addStudent(student: Student): void
    + removeStudent(studentId: String): void
    + updateStudent(student: Student): void
    + getStudent(studentId: String): Student
    + getAllStudents(): List<Student>
  }

  class CourseRepository {
    + addCourse(course: Course): void
    + removeCourse(courseId: String): void
    + updateCourse(course: Course): void
    + getCourse(courseId: String): Course
    + getAllCourses(): List<Course>
  }

  class StudentManagement {
    - studentRepo: StudentRepository
    + addStudent(student: Student): void
    + removeStudent(studentId: String): void
    + updateStudent(student: Student): void
    + displayStudentInfo(studentId: String): void
  }

  class CourseManagement {
    - courseRepo: CourseRepository
    + addCourse(course: Course): void
    + removeCourse(courseId: String): void
    + updateCourse(course: Course): void
    + displayCourseInfo(courseId: String): void
  }

  class Class {
    - className: String
    + getClassName(): String
    + setClassName(name: String): void
  }

  class DependencyInversion {
    + StudentRepository
    + CourseRepository
  }

  Student --|> Class
  Course --|> Teacher
  StudentRepository --|> Student
  CourseRepository --|> Course
  StudentManagement --> StudentRepository
  CourseManagement --> CourseRepository
  Class --|> DependencyInversion
  Teacher --|> DependencyInversion