用正则表达式替换手机号码前缀86

            Pattern p2 = Pattern.compile("^((\\+{0,1}0{0,2}86){0,1})");
            Matcher m2 = p2.matcher(phoneNum);
            StringBuffer sb = new StringBuffer();
            while (m2.find())
            {
                m2.appendReplacement(sb, "");
            }
            m2.appendTail(sb);
            return sb.toString();