mysql的问题。。。。jdbc保存到mysql

19:25:33,586 ERROR [STDERR] java.sql.SQLException: Incorrect string value: '\xEF\xBF\xBD' for column 'login_name' at row 1
19:25:33,586 ERROR [STDERR] at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928)
19:25:33,586 ERROR [STDERR] at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571)
19:25:33,586 ERROR [STDERR] at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)

报这个~~跪求大神