Mybatis and和循環(huán)or混用

這次項(xiàng)目用到一個(gè)and和or混用的場(chǎng)景 , 因?yàn)橛玫蕉鄠€(gè)or(循環(huán)), 沒(méi)想到好的辦法

最終轉(zhuǎn)換成用 IN實(shí)現(xiàn)：

場(chǎng)景

用left join鏈接多個(gè)表, 多個(gè)條件and篩選, 其中狀態(tài)(state)條件篩選出多個(gè)可選狀態(tài)的條目,

本來(lái)想用and 和 or 但是 or的條件是個(gè)數(shù)組參數(shù), 需要遍歷states , 可能0個(gè)可能多個(gè), 拼了半天沒(méi)有成功 , 最后發(fā)現(xiàn)用 IN 和FOREACH就可以了

DAO層接口

List<OrderInfoForm> selectOrdersByStatesSelective( @Param(value='order')Order order, @Param(value='states')Integer[] states);Mybatis實(shí)現(xiàn)

<select 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>

這里的重點(diǎn)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>

把多個(gè)state的or關(guān)系轉(zhuǎn)化為 states in (state1,state2,state3...)

in中用foreach循環(huán)

mybatis plus and 和or合并寫(xiě)法記錄一下and 和 or 混合使用

sql 語(yǔ)句實(shí)現(xiàn)

SELECT * FROM somc_operation_plan WHERE ( title LIKE ’%測(cè)試%’ 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()));

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持好吧啦網(wǎng)。