Unknown character set: 'utf8mb4' bug解决

Wed Jul 27 14:47:50 CST 2016 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown character set: 'utf8mb4'at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)at com.mysql.jdbc.Util.getInstance(Util.java:387)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:942)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902)at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2526)at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2673)at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545)at com.mysql.jdbc.ConnectionImpl.configureClientCharacterSet(ConnectionImpl.java:1769)at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3357)at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2297)at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083)at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806)at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410)at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328)at java.sql.DriverManager.getConnection(Unknown Source)at java.sql.DriverManager.getConnection(Unknown Source)at day01.ConnDemo.main(ConnDemo.java:31)

链接驱动数据库的驱动改成:mysql-connector-java-5.1.6-bin.jar即可。