package conect_DB;

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

public class Conexao {

    public static java.sql.Connection conexao;
    private static String servidor = "jdbc:mysql://localhost:3306/ucsal";

    public static boolean conectar() {
    try {

        Class driverMysql = Class.forName("com.mysql.jdbc.Driver");

        conexao = DriverManager.getConnection(servidor, "root", "");

        if (conexao == null) {
        return false;
        }
    }

    catch (ClassNotFoundException e) {
        System.out.println(e.getMessage() + " on method 'conectar' error");
    }

    catch (SQLException e) {
        System.out.println(e.getMessage());
    }

    return true;
    }

    public static void desconectar() {
    try {
        conexao.close();
    }

    catch (SQLException e) {
        System.out.println(e.getMessage());
    }

    catch (NullPointerException e) {
        System.out.println("method 'close()' error. Not conection opened");
    }
    }

}

package servlets;

public class Server {


}

<form name="form1" method="POST" action="Server">

//formulario aqui

</form>