Mermaid图表编辑器

classDiagram
    class Person {
        <<abstract>>
        +String id
        +String name
        +Date dateOfBirth
        +String email
        +String phone
        +getAge() int
    }
    class Student {
        +String studentId
        +Date enrollmentDate
        +StudentStatus status
        +Major major
        +registerCourse(Course course)
        +getGPA() double
    }
    class Teacher {
        +String employeeId
        +String department
        +AcademicTitle title
        +assignCourse(Course course)
        +gradeStudent(Student student, Course course, double score)
    }
    class Course {
        +String courseCode
        +String courseName
        +Integer credits
        +Semester semester
        +boolean addStudent(Student student)
        +boolean removeStudent(Student student)
    }
    class Department {
        +String deptCode
        +String deptName
        +Teacher chairperson
        +List~Course~ offeredCourses
        +addCourse(Course course)
        +assignChairperson(Teacher teacher)
    }
    class Enrollment {
        +Student student
        +Course course
        +Date enrollmentDate
        +Double grade
        +GradeStatus status
        +calculateGradePoint() double
    }
    Person <|-- Student
    Person <|-- Teacher
    Student "1" --> "0..*" Enrollment
    Course "1" --> "0..*" Enrollment
    Teacher "1" --> "0..*" Course : teaches
    Department "1" --> "0..*" Course : offers
    Department "1" --> "0..*" Teacher : employs
    Student "1" --> "1" Major : has
    class Major {
        +String code
        +String name
        +Department department
        +List~Course~ requiredCourses
    }