MySQL Unicode Datasource Problem

recently, I had problem about mysql database unicode on adf web application. In my table on mysql database table row is inserted to fine by unicode utf8 . but when insert new row to database from adf web application , unicode utf8 is not working. so i added follow connection string .



jdbc:mysql://localhost:3306/dbname?useUnicode=yes&characterEncoding=UTF8




and you need to check follow steps.
1. go to menu Tools->Preferences Encoding select UTF8
2. check encoding of all type page