mybatis返回主键

Dto

@Getter
@Setter
public class OrderDto implements Serializable{

	private static final long serialVersionUID = 1L;

	private Long orderId;
	private Integer productId;		//商品ID
	private BigDecimal unitPrice,	//单价
	private Integer	quantity;		//数量
}

Mapper

<insert id="insert" parameterType="com.OrderDto" useGeneratedKeys="true" keyProperty="order.orderId">
	INSERT INTO order (
	  productId,
	  unitPrice,
	  quantity
	)VALUES
	(
	  #{order.productId,jdbcType=INTEGER},
	  #{order.unitPrice,jdbcType=DECIMAL},
	  #{order.quantity,jdbcType=INTEGER}
	)
</insert>

Dao

	Long insert(@Param(value = "order") OrderDto order);