我的mybatis

IDEA工程文件请见：

mybatis框架应用工程文件 

练习过程中的BUG：

1、

org.apache.ibatis.exceptions.PersistenceException:

### Error querying database.  Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'cn.edu.sdut.selectCount'.  It's likely that neither a Result Type nor a Result Map was specified.

### The error may exist in mapper/Tbuser.xml

### The error may involve cn.edu.sdut.selectCount

### The error occurred while handling results

### SQL: SELECT COUNT(*) FROM tbuser

### Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'cn.edu.sdut.selectCount'.  It's likely that neither a Result Type nor a Result Map was specified.

解决：加入结果类型（位置：mapper->Tbuser.xml）

2、

解决方案一：修改UserMapper.xml文件

解决方案二：

3、

解决方案：将1图改为2图

4、重要