mybatis****生成pojo，dao，想启动测试一下，发现启动报错，
- ERROR 9112 — [ restartedMain] o.m.spring.mapper.MapperFactoryBean
- Error while adding the mapper ‘interface
cn.marblog.bwcar.dao.ActivityCarMapper’ to configuration.
org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is ‘cn/marblog/bwcar/dao/ActivityCarMapper.xml’. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for cn.marblog.bwcar.dao.ActivityCarMapper.BaseResultMap
Caused by: java.lang.IllegalArgumentException: Result Maps collection
already contains value for
cn.marblog.bwcar.dao.ActivityCarMapper.BaseResultMap at
org.apache.ibatis.session.ConfigurationStrictMap.put(Configuration.java:844)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.session.Configuration.addResultMap(Configuration.java:626)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java:214)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.builder.ResultMapResolver.resolve(ResultMapResolver.java:47)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:285)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:252)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:244)
~[mybatis-3.4.6.jar:3.4.6] at
org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:116)
~[mybatis-3.4.6.jar:3.4.6] … 30 common frames omitted
起初以为是没加注解，但是加上注解也不行，把****生成的文件删掉项目可以跑起来，所以应该是生成文件的问题，查了半天发现是有的表重复了，Result Maps collection already contains value for cn.marblog.bwcar.dao.ActivityCarMapper.BaseResultMap
所以在配置文件的 jdbcConnection标签中加入<property name="nullCatalogMeansCurrent" value="true"/>
删除原来的文件， 重新生成一下文件即可。