tomcat + mysql 报Unsupported character encoding 'GBK'.; nested exception is java.
JDBCURL指定的characterEncoding=utf8,tomcat也设置了编码为UTF8,然后tomcat报Unsupported character encoding 'GBK'.; nested exception is java.sql.SQLException: Unsupported character encoding 'GBK'.,GBK从和而来,数据库的编码也是UTF-8