常用工具类--- 脱敏工具

public static String hideIdNo(String realNo) {
    if (realNo == null) {
        return null;
    }
    String newNo = "";
    if (realNo.length() == 15) {
        newNo = realNo.replaceAll("(\\d{4})\\d{7}(\\d{4})", "$1*******$2");
    }
    if (realNo.length() == 18) {
        newNo = realNo.replaceAll("(\\d{4})\\d{10}(\\d{4})", "$1**********$2");
    }
    return newNo;
}

public static String hideName(String realname) {
    if (realname == null) {
        return null;
    }
    char[] r = realname.toCharArray();
    String name = "";
    if (r.length == 1) {
        name = realname;
    }
    if (r.length == 2) {
        name = realname.replaceFirst(realname.substring(1), "*");
    }
    if (r.length > 2) {
        name = realname.replaceFirst(realname.substring(1, r.length - 1), "*");
    }
    return name;
}

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;
}