如何使用JPA持久化多维Java数组？

@Entity
public class MyEntity {
    @Id
    private Long id;

    @ElementCollection
    @CollectionTable(name = "my_array", joinColumns = @JoinColumn(name = "entity_id"))
    private int[][] myArray;

    // Getters and setters
}

<persistence-unit name="myPersistenceUnit" transaction-type="RESOURCE_LOCAL">
    <class>com.example.MyEntity</class>
    <properties>
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/mydatabase"/>
        <property name="javax.persistence.jdbc.user" value="username"/>
        <property name="javax.persistence.jdbc.password" value="password"/>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
    </properties>
</persistence-unit>

EntityManagerFactory emf = Persistence.createEntityManagerFactory("myPersistenceUnit");
EntityManager em = emf.createEntityManager();

em.getTransaction().begin();

MyEntity entity = new MyEntity();
entity.setId(1L);
entity.setMyArray(new int[][]{{1, 2}, {3, 4}});

em.persist(entity);

em.getTransaction().commit();

em.close();
emf.close();