Android开发笔记（二）常见的正则校验—持续收录中

Android中常见的正则校验—持续收录中

app经常要检查用户输入信息是否正确，例如手机号是否合法、电子邮箱是否合法、身份证号是否合法等等。这种合法性验证就得用到正则表达式，对应到具体的处理类，便是Pattern和Matcher。Pattern是预定义校验规则，而Matcher则是进行校验判断；另外，从java1.4开始，对于简单的格式校验，也可直接调用String类的matches方法。常用的字符串校验场景与相应的示例代码如下：

 public static boolean isPhoneByPattern(String phone) {
     String regex = "^1[3|4|5|8]\\d{9}$";
     Pattern pattern = Pattern.compile(regex);
     Matcher matcher = pattern.matcher(phone);
     return matcher.matches();
 }

 public static boolean isPhoneByString(String phone) {
     // "[1]"代表第1位为数字1，"[358]"代表第二位可以为3、5、8中的一个，"\\d{9}"代表后面是可以是0～9的数字，有9位。
     String regex = "[1][358]\\d{9}";
     return phone.matches(regex);
 }

 public static boolean isEmailByPattern(String email) {
     String regex = "^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";
     Pattern pattern = Pattern.compile(regex);
     Matcher matcher = pattern.matcher(email);
     return matcher.matches();
 }

 public static boolean isEmailByString(String email) {
     String regex = "([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)";
     return email.matches(regex);
 }

 public static boolean isICNOByPattern(String icno) {
     String regex15 = "^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$";
     Pattern pattern15 = Pattern.compile(regex15);
     Matcher matcher15 = pattern15.matcher(icno);
     String regex18 = "^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}([0-9]|x|X)$";
     Pattern pattern18 = Pattern.compile(regex18);
     Matcher matcher18 = pattern18.matcher(icno);
     return (matcher15.matches() || matcher18.matches());
 }

 public static boolean isICNOByString(String icno) {
     String regex15 = "[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}";
     String regex18 = "[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}([0-9]|x|X)";
     return (icno.matches(regex15) || icno.matches(regex18));
 }