App(4.22)

public class Dao{
    
    public static int userLogin(Connection con, String phone, String password) {
        int x = 0;
        try {
            String sql = "SELECT COUNT(*) FROM user WHERE phone=? AND pwd=?";
            PreparedStatement ps = con.prepareStatement(sql);
            ps.setString(1, phone);
            ps.setString(2, password);
 
            ResultSet rs = ps.executeQuery();
 
            if (rs.next()) {
                x = rs.getInt(1);
            }
 
        } catch (Exception e) {
            e.printStackTrace();
            x = -1;
        }
        return x;
    }
}