'Cliente',
    'CREATE TABLE `cliente` (
    `ClientId` int(11) NOT NULL,
    `ApellidoPaterno` varchar(255) NOT NULL,
    `ApellidoMaterno` varchar(255) DEFAULT NULL,
    `Nombre` varchar(255) DEFAULT NULL,
    `Telefono` mediumtext,
    `Username` varchar(255) NOT NULL,
PRIMARY KEY (`ClientId`)
)
ENGINE=InnoDB DEFAULT CHARSET=utf8'

package me.jmll.utm.config;

import java.sql.*;

public class Conexion{

public Connection getConexion(){
    Connection con = null;
    try {
        Class.forName("com.mysql.jdbc.Driver");
        con = DriverManager.getConnection(
        "jdbc:mysql://localhost:3306/miscelanialabety","root","Patito01");
        return con;
    }
    catch(Exception e){
        try {throw e;}
    catch (Exception e1) { e1.printStackTrace();}}
    return con;
    }
}

@Override
        public List<Cliente> getClientes() {
            String sql = "SELECT * FROM Cliente";

            try {
                conexion = new Conexion().getConexion();
                PreparedStatement ps = conexion.prepareStatement(sql);
                Cliente cliente = null;
                List<Cliente> listaClientes = new ArrayList<Cliente>();
                ResultSet rs = ps.executeQuery();
                while (rs.next()) {
                    cliente = new Cliente(
                        rs.getInt(1),
                        rs.getString("ApellidoPaterno"),
                        rs.getString("ApellidoMaterno"),
                        rs.getString("Nombre"),
                        rs.getLong("Telefono"),
                        rs.getString("Username")
                    );
                    listaClientes.add(cliente);
                }
                rs.close();
                ps.close();
                return listaClientes;
            } catch (SQLException e) {
                throw new RuntimeException(e);
            } finally {
                if (conexion != null) {
                    try { conexion.close();}
                    catch (SQLException e) {}
                }
            }
        }