yijian941215的博客

Mybatis+mysql主键自增长,插入语句返回主键id#（一）SQL语句获取主键自增长的id<insert id="addGoods" parameterType="com.wlmall.shop.domain.Goods"><-/ 通过此语句获取主键id，我的id是Long类型keyProperty中写主键列的字段名称，执行之后要插入的类id就会自动赋值->...

1.查询的数据对象@Datapublic class JdOrder implements Serializable{ private Long orderId; private Long finishTime; private Integer orderEmt; private Long orderTime; private Long pare...

1.问题写法 <if test="orderStatus != null and orderStatus != '' "> and fpr.status=#{orderStatus} </if>如图在orderStatus != ’ ’ 中，当orderStatus 值为0时，sql语句未通过条件判断，这是因为...