一般遇到这种问题肯定要看一看association中元素编写顺序,

<resultMap id="orderRslMap" type="orders">
<id property="id" column="id"></id>
<result property="number" column="number"></result>
<result property="createtime" column="createtime"></result>
<result property="note" column="note"></result>
<!--
property:为order类中属性
javaType:为具体类的类型
-->
<!-- 往orders的user匹配数据,模型里有模型,使用association来配置-->
<association property="user" javaType="user">
`<id property="id" column="user_id"></id>
<result property="username" column="username"></result>
<result property="address" column="address"></result>
</association>
</resultMap>

仔细观察几遍都没看出什么

很无语纠结,重新写一遍没有错误

反复对照,才发现在id元素前面多了一个 `

浪费了10分钟,记录一下,算个教训

使用IDEA我是把`设置成快捷键,发生这个错误也是正常,下次注意!

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