[Tip] JAVA 각종 유용한 정규식

이메일 주소 정규식 

(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])

휴대폰 번호 정규식 ((010, 011, 016 등) (3자리/4자리) 4자리)

01(?:0|1|[6-9])(?:\d{3}|\d{4})(\d{4})

IP 주소

((([0-9])|([1-9]\d{1})|(1\d{2})|(2[0-4]\d)|(25[0-5]))\.){3}(([0-9])|([1-9]\d{1})|(1\d{2})|(2[0-4]\d)|(25[0-5]))

URL 주소

^(https?):\/\/([^:\/\s]+)(:([^\/]*))?((\/[^\s/\/]+)*)?\/?([^#\s\?]*)(\?([^#\s]*))?(#(\w*))?$

사용 방법

public class DataValidation {
    public static boolean isValidValue(String value, Type type){
        if (type.equals(Type.EMAIL))
            return Pattern.matches(EMAIL_REGEX, value);
 
        else if (type.equals(Type.PHONE_NUMBER))
            return Pattern.matches(PHONE_NUMBER_REGEX, value);
 
        return false;
    }
    public enum Type { EMAIL, PHONE_NUMBER }
    private static final String EMAIL_REGEX = "(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])";
    private static final String PHONE_NUMBER_REGEX = "01(?:0|1|[6-9])(?:\\d{3}|\\d{4})(\\d{4})";
}

기타 유용한 것들 : http://www.mkyong.com/regular-expressions/10-java-regular-expression-examples-you-should-know/