有谁能帮帮我这个新手看看是什么问题

Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.swt.Firstmybatis.userinfoMapper.getuserinfo
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.swt.Firstmybatis.userinfoMapper.getuserinfo
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
at com.swt.Firstmybatis.Test.main(Test.java:19)
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.swt.Firstmybatis.userinfoMapper.getuserinfo
at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:797)
at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:631)
at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:624)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107)
... 3 more