mybatis mapper遇到问题

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Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.baseinfo.mapper.UserCustomFieldMapper.userCustomFieldBaseMap
at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:802)
at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:774)
at org.apache.ibatis.session.Configuration.addResultMap(Configuration.java:556)
at org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java:217)
at org.apache.ibatis.builder.ResultMapResolver.resolve(ResultMapResolver.java:47)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:285)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:252)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:244)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:116)
... 52 more

问题可能原因：

1.mapper和mapper.xml中的方法名不相同

2.xml文件中namespace写错了

3.包路径写错了

4.传入mapper的参数和mapper上定义的类型不一样

通过一个个删除.xml文件中的方法。。。。

定位到，原因是在自动生成xml文件时，文件包路径写错了。

<select id="queryUserCustomFields" parameterType="com.baseinfo.vo.ee.UserCustomFieldVo" resultMap="userCustomFieldBaseMap">select<include refid="userCustomField_column_list"></include>from crm_user_custom_field t<where><include refid="query_userCustomField_where"></include></where></select>

其中parameterType包的路径写错了。

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