Exception in thread “main” org.apache.ibatis.exceptions.PersistenceException:
Error opening session. Cause: java.lang.NullPointerException
Cause: java.lang.NullPointerException
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSessionFromDataSource(DefaultSqlSessionFactory.java:100)
at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSession(DefaultSqlSessionFactory.java:47)
at app.test.main(test.java:23)
Caused by: java.lang.NullPointerException
at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSessionFromDataSource(DefaultSqlSessionFactory.java:95)
… 2 more
解决办法：在配置文件中单词写错误，仔细检查