Mybatis中and和循环or混用操作(or转换成in)

Mybatis and和循环or混用

这次项目用到一个and和or混用的场景 , 因为用到多个or(循环), 没想到好的办法

最终转换成用 IN实现：

场景

用left join链接多个表, 多个条件and筛选, 其中状态(state)条件筛选出多个可选状态的条目,

本来想用and 和 or 但是 or的条件是个数组参数, 需要遍历states , 可能0个可能多个, 拼了半天没有成功 , 最后发现用 IN 和FOREACH就可以了

DAO层接口

List<OrderInfoForm> selectOrdersByStatesSelective(
           @Param(value="order")Order order,
           @Param(value="states")Integer[] states);

Mybatis实现

<select id="selectOrdersByStatesSelective" resultMap="AllResultMap" >
   select
   <include refid="All_Column_List" />
   from order_list
   LEFT JOIN product_method ON product_method.`code` = order_list.purchase_method
   LEFT JOIN product_color ON product_color.`code` = order_list.color
   LEFT JOIN product_guarantee ON product_guarantee.`code` = order_list.guarantee
   LEFT JOIN product_info ON order_list.product_id = product_info.id
   LEFT JOIN product_model ON product_info.model = product_model.`code`
   LEFT JOIN product_standard ON product_info.standard = product_standard.`code`
   LEFT JOIN product_state ON product_state.`code` = order_list.order_state
   LEFT JOIN product_apperance ON product_apperance.`code` = order_list.apperance
   LEFT JOIN product_brand ON product_brand.`code` = product_info.brand
   <where>
       <if test="order.orderNum != null " >
           order_num like "％"#{order.orderNum,jdbcType=VARCHAR}"％"
       </if>
       <if test="order.operator != null " >
           and operator like "％"#{order.operator,jdbcType=VARCHAR}"％"
       </if>
       <if test="order.purchaseTime != null" >
           and purchase_time = #{order.purchaseTime,jdbcType=DATE}
       </if>
       <if test="order.orderState != null" >
           and order_state = #{order.orderState,jdbcType=VARCHAR}
       </if>
       <if test="order.serialNum != null" >
           and serial_num like "％"#{order.serialNum,jdbcType=VARCHAR}"％"
       </if>

<if test="states != null and states.length >0">
           <foreach collection="states" item="state" separator="," open=" and order_state in (" close=")">
               #{state,jdbcType=BIGINT}
           </foreach>
       </if>
   </where>
 </select>

这里的重点是：

<if test="states != null and states.length >0">
           <foreach collection="states" item="state" separator="," open=" and order_state in (" close=")">
               #{state,jdbcType=BIGINT}
           </foreach>
</if>

把多个state的or关系转化为 states in (state1,state2,state3...)

in中用foreach循环

mybatis plus and 和or合并写法

记录一下and 和 or 混合使用

sql 语句实现

SELECT  * FROM somc_operation_plan
WHERE ( title LIKE '％测试％' AND ( charge_user = 'xxx' OR execute_user = 'xxx' ) )

LambdaQueryWrapper<SomcOperationPlan> queryWrapper = new LambdaQueryWrapper<>();
queryWrapper.like(StringUtils.isNotEmpty(operationPlan.getTitle()), SomcOperationPlan::getTitle, operationPlan.getTitle())
       .and(wrapper -> wrapper.eq(StringUtils.isNotEmpty(operationPlan.getChargeUser()), SomcOperationPlan::getChargeUser, operationPlan.getChargeUser()).or().eq(StringUtils.isNotEmpty(operationPlan.getExecuteUser()), SomcOperationPlan::getExecuteUser, operationPlan.getExecuteUser()));

来源：https://blog.csdn.net/q5706503/article/details/86534687