public static String hidePhone(String realPhone) {
if (realPhone == null) {
return null;
}
String phoneNumber;
if (realPhone.length() == 11) {
phoneNumber = realPhone.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
} else {
phoneNumber = realPhone;
}
return phoneNumber;
}
