“Cómo validar la información contra la base de datos en Java” Código de respuesta

Cómo validar la información contra la base de datos en Java

public boolean regFamily(FamilyAccount myFam, Customer myCust) throws Exception {
    int fid = 0;
    try {

        String selectStatement2 = "SELECT * from familyok.user where nric = ?  and  familyid is NOT NULL ";
        PreparedStatement pStmt2 = con.prepareStatement(selectStatement2);
        pStmt2.setString(1, myCust.getNric());
        ResultSet rs2 = pStmt2.executeQuery();
        if (rs2.next()) {

            String insertStatement = "Insert into familyok.familyaccount (familyname, fnric1, fnric2, fnric3)";
            insertStatement = insertStatement + "values (?,?,?,?)";
            PreparedStatement prepStmt = con.prepareStatement(insertStatement);
            prepStmt.setString(1, myFam.getFamilyname());
            prepStmt.setString(2, myFam.getFnric1());
            prepStmt.setString(3, myFam.getFnric2());
            prepStmt.setString(4, myFam.getFnric3());
            int status = prepStmt.executeUpdate();
            if (status != 0) {

                String selectStatement = "SELECT fid FROM familyok.familyaccount WHERE fnric1=?";
                PreparedStatement pStmt = con.prepareStatement(selectStatement);
                pStmt.setString(1, myFam.getFnric1());
                ResultSet rs = pStmt.executeQuery();
                if (rs.next()) {
                    System.out.println(rs.getInt("fid") + "\t");
                    fid = rs.getInt("fid");

                    String updateStatement = "update familyok.user set familyid=?, familyname1=? where nric in (?,?,?)";
                    PreparedStatement preparedStmt = con.prepareStatement(updateStatement);
                    preparedStmt.setInt(1, fid);
                    preparedStmt.setString(2, myFam.getFamilyname());
                    preparedStmt.setString(3, myFam.getFnric1());
                    preparedStmt.setString(4, myFam.getFnric2());
                    preparedStmt.setString(5, myFam.getFnric3());

                    int status2 = preparedStmt.executeUpdate();
                    System.out.println("update=" + preparedStmt.toString());

                    if (status2 != 0) {
                        System.out.println("Family Account Created");
                        return true;
                    }
                }
            }

        }

        else

        {

            System.out.println("Can't Register");
            return false;

        }

    } catch (Exception ex) {
        throw new Exception("Error: " + ex.getMessage());
    }
    return false;

}