插入之后获取id
dishMapper.insert(dish);
Long dishId = dish.getId();
mapper文件
<insert id="insert" parameterType="com.sky.entity.Dish" useGeneratedKeys="true" keyProperty="id">
INSERT INTO dish(name, category_id, price, image, description, status, create_time, update_time, create_user, update_user)
VALUES(#{name}, #{categoryId}, #{price}, #{image}, #{description}, #{status}, #{createTime}, #{updateTime}, #{createUser}, #{updateUser})
</insert>