换个新版本的jar包 Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.

javaweb报错：Could not get JDBC Connection； nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNo

报错内容：
Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.
原因：mysql-connecter的jar包太老，mysql版本太新
解决：换个新版本的jar包