A query was run and no Result Maps were found for the Mapped Statement 'user.insertUser!selectKey'. It's likely that neither a Result Type nor a Result Map was specified.

使用mybatis时出现异常问题：

有如下的错误

1Error querying database.  Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'user.insertUser!selectKey'.  It's likely that neither a Result Type nor a Result Map was specified.

这个是使用MyBatis最常见的一种错误，从其描述来看是user.insertUser!selectKey这个Statement没有Result Type或Result Map。下面是我的配置文件的statement：

123select LAST_INSERT_ID()45insert into user(username,birthday,sex,address) value (#{username},#{birthday},#{sex},#{address});6

可以看出主要是没有resultType所致的。

mybatis中不管什么查询，都必须返回resultType或者resultMap的值，否则就会报错的。