Pit father of code | or you say the phone number should be how to verify it!

In today's Internet applications, the phone number has been completely replaced e-mail has become uniquely identifies the user's registered account. With the rapid development of mobile networks, various mobile phone number prefix has introduced, how to verify a valid mobile number is the programmer must focus on function points, you say important, right? Did not seem so important, you say important, right? Once the program error, the user can not be registered and that is a major event!

So how do you see the following passage verify the phone number is correct code?

public String validatePhone(String phoneStr) {
  if (phoneStr != null) {
	if (phoneStr.length() == 11) {
	  if (isNumeric(phoneStr)) {
		if (phoneStr.startsWith("130") || phoneStr.startsWith("131") || phoneStr.startsWith("132")
			|| phoneStr.startsWith("134") || phoneStr.startsWith("135") || phoneStr.startsWith("136")
			|| phoneStr.startsWith("137") || phoneStr.startsWith("138") || phoneStr.startsWith("139")
			|| phoneStr.startsWith("140") || phoneStr.startsWith("141") || phoneStr.startsWith("142")
			|| phoneStr.startsWith("144") || phoneStr.startsWith("145") || phoneStr.startsWith("146")
			|| phoneStr.startsWith("147") || phoneStr.startsWith("148") || phoneStr.startsWith("149")
			|| phoneStr.startsWith("150") || phoneStr.startsWith("151") || phoneStr.startsWith("152")
			|| phoneStr.startsWith("154") || phoneStr.startsWith("155") || phoneStr.startsWith("156")
			|| phoneStr.startsWith("157") || phoneStr.startsWith("158") || phoneStr.startsWith("159")
			|| phoneStr.startsWith("170") || phoneStr.startsWith("171") || phoneStr.startsWith("172")
			|| phoneStr.startsWith("174") || phoneStr.startsWith("175") || phoneStr.startsWith("176")
			|| phoneStr.startsWith("177") || phoneStr.startsWith("178") || phoneStr.startsWith("179")
			|| phoneStr.startsWith("180") || phoneStr.startsWith("181") || phoneStr.startsWith("182")
			|| phoneStr.startsWith("184") || phoneStr.startsWith("185") || phoneStr.startsWith("186")
			|| phoneStr.startsWith("187") || phoneStr.startsWith("188") || phoneStr.startsWith("189")) {
			return "手机号正确";
		  } else {
			return "手机号规则错误";
		  }
		} else {
		  return "手机号必须为数字";
		}
	} else {
		return "手机号长度必须为11位";
	}
  } else {
	return "手机号不能为空";
  }
}

Logic does not seem a problem, but really good long-winded ah! ! !

So you have a better way to do this?

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Pit father of code | or you say the phone number should be how to verify it!

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