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

public class BancoDeDados {

	private static Connection conexao;
	private static ResultSet resultado;

	public static boolean conectar() {

		try {
			Class.forName("com.mysql.jdbc.Driver");
			BancoDeDados.conexao = DriverManager
					.getConnection("jdbc:mysql://localhost/BancoDeSangue?user=root&password=1234");

		} catch (ClassNotFoundException e) {

			e.printStackTrace();
			return false;

		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		}

		return true;

	}

	public static boolean executar(String sql) {
		Statement query;

		try {
			query = BancoDeDados.conexao.createStatement();
			query.execute(sql);

			BancoDeDados.resultado = query.getResultSet();

		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		}

		return true;

	}

	public static ResultSet recuperarResultados() {

		return BancoDeDados.resultado;
	}

	public static boolean desconectar() {

		try {
			BancoDeDados.conexao.close();

		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
}