mybatis foreach報錯It was either not specified and/or could not be found for the javaType Type handler
阿新 • • 發佈:2018-12-13
或許是慣性思維,在mybatis使用foreach迴圈呼叫的時候,很多時候都是傳一個物件,傳一個List的情況很少,所以寫程式碼有時候會不注意就用慣性思維方法做了。
今天向sql傳參,傳了一個List作為引數,然後在xml裡再foreach迴圈呼叫。然後報錯資訊如:
mybatis foreach報錯It was either not specified and/or could not be found for the javaType
Type handler was null on parameter mapping for property '__flowStepCode_0
Mapper介面
List<AllocationHandlerInfoVo> listAllocatedHandlerInfo(@Param("flowStepCodeList")List<ApprStepModel> flowStepCodeList);
原來是這樣:#{flowStep},
處理方法,換成#{flowStep.flowStepCode}
,List是個集合來的,要注意,寫部落格記錄
<if test="flowStepCodeList != null and flowStepCodeList.size() > 0"> fh.flow_step_code in <foreach collection="flowStepCodeList" item="flowStep" index="index" open="(" close=")" separator=","> #{flowStep.flowStepCode} </foreach> </if>