Problema com insert

Exception in thread "main" java.sql.SQLException: Unknown initial character set index '48' received from server. Initial client character set can be forced via the 'characterEncoding' property.
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:910)
	at com.mysql.jdbc.Connection.configureClientCharacterSet(Connection.java:2345)
	at com.mysql.jdbc.Connection.initializePropsFromServer(Connection.java:3913)
	at com.mysql.jdbc.Connection.createNewIO(Connection.java:2683)
	at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at br.com.david.jdbc.ConnectionFactory.getConnection(ConnectionFactory.java:11)
	at br.com.david.dao.TesteDAO.<init>(TesteDAO.java:14)
	at br.com.david.teste.TestaInsere.main(TestaInsere.java:14)

package br.com.david.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import br.com.david.bean.Teste;
import br.com.david.jdbc.ConnectionFactory;

public class TesteDAO {
	private Connection con;
	
	public TesteDAO() throws SQLException {
		this.con = ConnectionFactory.getConnection();
	}
	
	public void adiciona(Teste teste) throws SQLException {
		PreparedStatement stmt = this.con.prepareStatement("insert into teste (nome) values (?)");
		stmt.setString(1, teste.getNome());
		stmt.execute();
		stmt.close();
		con.close();
	}
}

package br.com.david.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class ConnectionFactory {
	public static Connection getConnection() throws SQLException {
		try {
			Class.forName("com.mysql.jdbc.Driver");
			return DriverManager.getConnection("jdbc:mysql://localhost/teste", "root", "" );
		} catch(ClassNotFoundException e) {
			throw new SQLException(e.getMessage());
		}
	}
}

package br.com.david.teste;

import java.sql.SQLException;

import br.com.david.bean.Teste;
import br.com.david.dao.TesteDAO;

public class TestaInsere {
	public static void main(String[] args) throws SQLException {
		
		Teste teste = new Teste();
		teste.setNome("david");
		
		TesteDAO dao = new TesteDAO();
		dao.adiciona(teste);
	}
}