public class CpassDao extends ActionSupport {

    private static final long serialVersionUID = 1L;

    public static boolean validate(String username,String password,String npass) {
        boolean status = false;
        ChangePass cp = new ChangePass();

        try {
            Connection con = DBConnection.getConnection();
            PreparedStatement ps = con.prepareStatement("select * from doctable where username=? and password=?");

            ps.setString(1, username);
            ps.setString(2, password);

            ResultSet rs= ps.executeQuery();
            status = rs.next();

            if(true) {
                PreparedStatement ps1 = con.prepareStatement("update details set password=? where username=?");
                ps1.setString(1, cp.getNpass());
                ps1.setString(2, cp.getUsername());
                ps1.executeUpdate();
            }
        }

        catch (Exception ex) {
            ex.printStackTrace();

            return status;
        }

        return status;
    }
}