jsp关于数据插入数据有误

在jsp中遇到添加数据进入数据库有错误，我想是不是编码的问题？因为我原来在UTF-8都是gb2312，用gb2312时虽然能插入数据库但是那个会出现乱码问题，现在用UTF-8确连数据都插不进去了

错误提示如下：
B.插入数据有错误：Incorrect string value: '\xC2\x8C\xC2\x97\xC3\xA4...' for column 'hometown' at row 1
java.sql.SQLException: Incorrect string value: '\xC2\x8C\xC2\x97\xC3\xA4...' for column 'hometown' at row 1
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2642)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1647)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1566)
at DBClass.DBBean.DBInsert(DBBean.java:31)
at DBClass.stuBean.addStudent(stuBean.java:80)
at DBClass.studentSer.doAdd(studentSer.java:138)
at DBClass.studentSer.doPost(studentSer.java:40)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.cata