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
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List<OrderInfoForm> selectOrdersByStatesSelective( @Param(value="order")Order order, @Param(value="states")Integer[] states); |
Mybatis实现
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<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：
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<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
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SELECT * FROM somc_operation_plan WHERE ( title LIKE '%测试%' AND ( charge_user = 'xxx' OR execute_user = 'xxx' ) ) |
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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())); |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/q5706503/article/details/86534687
