一、运用正则来验证手机号

public static void main(String[] args) {

String phone = "13123456789";

String phoneNumber = phone.replaceAll("(\\d{3})\\d{4}(\\d{4})","$1****$2");

System.out.println("正则phone中4*：" + phoneNumber);

}

效果为：

二、正则验证身份证号

public static void main(String[] args) {

String idCard = "123456789987654321";

//$1、$2、……表示正则表达式里面第一个、第二个、……括号里面的匹配内容

String idCardNumber = idCard.replaceAll("(\\d{4})\\d{10}(\\w{4})","$1****$2");

System.out.println("身份证号长度："+idCard.length());

System.out.println("正则idCard中4*：" + idCardNumber);

}

效果为：

3、获取文本中的手机号

public static void main(String[] args) {

String text = "13522158842;托尔斯泰;test2;13000002222;8613111113313";

Pattern pattern = Pattern.compile("(?<!\\d)(?:(?:1[358]\\d{9})|(?:861[358]\\d{9}))(?!\\d)"）；

Matcher matcher = pattern.matcher(text);

StringBuffer bf = new StringBuffer(64);

while (matcher.find()) {

bf.append(matcher.group()).append(",");

}

int len = bf.length();

if (len > 0) {

bf.deleteCharAt(len - 1);

}

System.out.println(bf.toString());

}