### Error building SqlSession.
### The error may exist in dao/userMapper.xml
### The error occurred while processing mapper_resultMap[userResultMap]
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'User'. Cause: java.lang.ClassNotFoundException: Cannot find class: User

看看sql语句是不错了，dao层mapper映射文件里面的内容， 看看resultMap里面整合的和数据库是否一致。