我有一個帶有cooperator和student模型（等等）的彈簧啟動應用程序。他們有來自合作者方面的@oneToMany 關系和來自學生方面的@ManyToOne合作者等級：@Entitypublic class Cooperator{    private Integer id;    public void setId(Integer value) {        this.id = value;    }    @Id    public Integer getId() {        return this.id;    }    private Set<Student> student;    @OneToMany(mappedBy="cooperator", cascade={CascadeType.ALL})    public Set<Student> getStudent() {       return this.student;    }    public void setStudent(Set<Student> students) {       this.student = students;    }    public void addStudent(Student student) {        try {            this.student.add(student);        }        catch(Exception e) {                this.student = new HashSet<Student>();            this.student.add(student);        }    }}學生班級：@Entitypublic class Student{    private String studentID;    public void setStudentID(String value) {       this.studentID = value;    }    @Id    public String getStudentID() {        return this.studentID;    }    private Cooperator cooperator;    @ManyToOne(optional=false)    public Cooperator getCooperator() {       return this.cooperator;    }    public void setCooperator(Cooperator cooperator) {       this.cooperator = cooperator;    }}我正在通過以下方式測試關系：    @Test    public void cooperatorStudent() {        String studentID = "260632353";        String firstname = "Saleh";        String lastname = "Bakhit";        Student student1 = service.createStudent(studentID, firstname, lastname, cooperator);        assertEquals(cooperator, student1.getCooperator());    }問題是 assertTrue 語句失敗，即使cooperatorStudents實際上包含兩個student對象。非常感謝任何關于為什么會這樣的幫助。