java - Spring : Could not determine type for: java. util.List

Question

我有以下场景:我有一个 Student 类和 students 表。我有类(class)类(class)和类(class)表。每个学生和类(class)都有唯一的 ID。我想将一个列表放入学生类中，该列表由类(class) ID 映射。

我尝试了很多注释和关系，但没有成功

@Entity
@Table(name = "courses")
public class Course {

    private long id;
    private String name;

    public Course() {

    }

    public Course(String name, int size) {
        this.name = name;
        this.size = size;
    }

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    @Column(name = "name", nullable = false)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

@Entity
@Table(name = "students")
public class Student {

    private long id;
    private String name;
    @OneToMany(cascade = CascadeType.ALL)
    private List<Course> courses = new ArrayList<>();

    public Student() {

    }

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    @Column(name = "name", nullable = false)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<Course> getCourses() {
        return courses;
    }

    public void setCourses(List<Course> courses) {
        this.courses = courses;
    }
}

你能帮我实现这个目标吗，因为我是 Spring 的新手

Answer 1

声明一对多关系时使用以下内容

@Column(name="course_id")
private Set<Course> courses;