//true是手机号，false不是手机号

public static boolean checkPhone(String phone){

    Pattern p = Pattern.compile("^[1](([3-9][\\d])|([4][5,6,7,8,9])|([6][5,6])|([7][3,4,5,6,7,8])|([9][8,9]))[\\d]{8}$");

    if(p.matcher(phone).matches()){

        return true;

    }

    return false;

}

public static boolean checkEmail(String email) {

    if (StringUtils.isEmpty(email)){

        return false;

    }

    String regEx1 = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";

    Pattern p;

    Matcher m;

    p = Pattern.compile(regEx1);

    m = p.matcher(email);

    if (m.matches()){

        return true;

    }

    return false;

}

设置手机号中间4位为*号

"13265478941".replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2")