java.sql.SQLException: Incorrect string value: '\x

pid:7 nid:1 exception:setl:com.alibaba.otter.node.etl.load.exception.LoadException: java.util.concurrent.ExecutionException: com.alibaba.otter.node.etl.load.exception.LoadException: com.alibaba.otter.node.etl.load.exception.LoadException: com.alibaba.otter.node.etl.load.exception.LoadException: org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [insert into tmall.tmall_sub_order(tmall_order_id , tmall_sub_order_id , tmall_num_id , tmall_stu_nick , tmall_outer_id , tmall_num , tmall_title , tmall_item_price , tmall_discount_fee , tmall_secure_fee , tmall_payment , tmall_sub_order_status , biz_status , err_msg , payment_time , create_time , update_time , id) values (? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ?) on duplicate key update tmall_order_id=values(tmall_order_id) , tmall_sub_order_id=values(tmall_sub_order_id) , tmall_num_id=values(tmall_num_id) , tmall_stu_nick=values(tmall_stu_nick) , tmall_outer_id=values(tmall_outer_id) , tmall_num=values(tmall_num) , tmall_title=values(tmall_title) , tmall_item_price=values(tmall_item_price) , tmall_discount_fee=values(tmall_discount_fee) , tmall_secure_fee=values(tmall_secure_fee) , tmall_payment=values(tmall_payment) , tmall_sub_order_status=values(tmall_sub_order_status) , biz_status=values(biz_status) , err_msg=values(err_msg) , payment_time=values(payment_time) , create_time=values(create_time) , update_time=values(update_time) , id=values(id)]; SQL state [HY000]; error code [1366]; Incorrect string value: '\xEF\xBF\xBD\xEF\xBF\xBD...' for column 'tmall_stu_nick' at row 1; nested exception is java.sql.SQLException: Incorrect string value: '\xEF\xBF\xBD\xEF\xBF\xBD...' for column 'tmall_stu_nick' at row 1

字符集均为UTF-8，请教大神，咋解决？

原提问者GitHub用户 angelmm126