Unknown initial character set index '255' received from server

剛學mybatis，測試的時候有異常：

Caused by: java.sql.SQLException: Unknown initial character set index '255' received from server. 
Initial client character set can be forced via the 'characterEncoding' property.

去檢查數據庫的數據，有漢字

 

就在url后面加上了"?characterEncoding=utf8"之后就可以正常顯示了。