如何使用Hibernate JPA 2以二进制形式存储uuid

@Column(columnDefinition = "BINARY(16)")
private UUID uuid;

public class BinaryUUIDType implements UserType {

    @Override
    public int[] sqlTypes() {
        return new int[]{Types.BINARY};
    }

    @Override
    public Class returnedClass() {
        return UUID.class;
    }

    @Override
    public boolean equals(Object x, Object y) throws HibernateException {
        if (x == y) {
            return true;
        }
        if (x == null || y == null) {
            return false;
        }
        return x.equals(y);
    }

    @Override
    public int hashCode(Object x) throws HibernateException {
        return x.hashCode();
    }

    @Override
    public Object nullSafeGet(ResultSet rs, String[] names, SharedSessionContractImplementor session, Object owner) throws HibernateException, SQLException {
        byte[] bytes = rs.getBytes(names[0]);
        if (bytes != null && bytes.length == 16) {
            ByteBuffer buffer = ByteBuffer.wrap(bytes);
            long mostSigBits = buffer.getLong();
            long leastSigBits = buffer.getLong();
            return new UUID(mostSigBits, leastSigBits);
        }
        return null;
    }

    @Override
    public void nullSafeSet(PreparedStatement st, Object value, int index, SharedSessionContractImplementor session) throws HibernateException, SQLException {
        if (value == null) {
            st.setNull(index, Types.BINARY);
        } else if (value instanceof UUID) {
            UUID uuid = (UUID) value;
            ByteBuffer buffer = ByteBuffer.allocate(16);
            buffer.putLong(uuid.getMostSignificantBits());
            buffer.putLong(uuid.getLeastSignificantBits());
            st.setBytes(index, buffer.array());
        }
    }

    // 其他方法省略...
}

<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/mydatabase"/>
<!-- 其他配置省略... -->
<property name="hibernate.type_contributors" value="com.example.BinaryUUIDType"/>