报错
Exception in thread "main" java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927) at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.java:1023) at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3451) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2443) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2213) at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:797) at com.mysql.jdbc.JDBC4Connection. (JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305) at org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$createConnectionFactory$2.apply(JdbcUtils.scala:65) at org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$createConnectionFactory$2.apply(JdbcUtils.scala:56) at org.apache.spark.sql.DataframeWriter.jdbc(DataframeWriter.scala:408) at task_hotel01_subjob2$.main(task_hotel01_subjob2.scala:55) at task_hotel01_subjob2.main(task_hotel01_subjob2.scala)
解决
主要原因：数据库版本与mysql连接驱动不匹配问题
因为本人本地数据库是mysql 8.x，虚拟机数据库是5.x，用的mysql连接驱动5.x版本，所以本地运行出现此问题，更换为8.x即可。
mysql mysql-connector-java 8.0.11
