Caused by: java.lang.IllegalArgumentException: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'com/xxxx/xxxx/common/core/mymapper/auth/AccessTokenMapper.xml'. Cause: org.apache.ibatis.builder.BuilderException: Wrong namespace. Expected 'com.xxxx.xxxx.common.core.mymapper.auth.AccessTokenMapper' but found 'com.xxxxx.securityuaa.mapper.auth.OauthAccessTokenMapper'.
	at tk.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:86) ~[mapper-spring-1.1.5.jar:na]
	at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845) ~[spring-beans-5.3.9.jar:5.3.9]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ~[spring-beans-5.3.9.jar:5.3.9]
	... 16 common frames omitted
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'com/xxxx/xxxx/common/core/mymapper/auth/AccessTokenMapper.xml'. Cause: org.apache.ibatis.builder.BuilderException: Wrong namespace. Expected 'com.xxxx.xxxx.common.core.mymapper.auth.AccessTokenMapper' but found 'com.xxx.securityuaa.mapper.auth.OauthAccessTokenMapper'.
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:120) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:92) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.loadXmlResource(MapperAnnotationBuilder.java:173) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(MapperAnnotationBuilder.java:124) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.binding.MapperRegistry.addMapper(MapperRegistry.java:72) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.session.Configuration.addMapper(Configuration.java:741) ~[mybatis-3.4.6.jar:3.4.6]
	at tk.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:83) ~[mapper-spring-1.1.5.jar:na]
	... 19 common frames omitted
Caused by: org.apache.ibatis.builder.BuilderException: Wrong namespace. Expected 'com.xxx.xxxx.common.core.mymapper.auth.AccessTokenMapper' but found 'com.xxxxx.securityuaa.mapper.auth.OauthAccessTokenMapper'.
	at org.apache.ibatis.builder.MapperBuilderAssistant.setCurrentNamespace(MapperBuilderAssistant.java:78) ~[mybatis-3.4.6.jar:3.4.6]
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:112) ~[mybatis-3.4.6.jar:3.4.6]
	... 25 common frames omitted

这个问题是mybatis的对应的mapper.xml文件的命名空间错误导致的，改成正确的就行了。