ValidationUtils.java

package com.jdroid.java.utils;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Pattern;

/**
 * Validation Utils
 */
public class ValidationUtils {
	
	public static final Pattern EMAIL_PATTERN = Pattern.compile("^[_A-Za-z0-9\\+-]+(\\.[_A-Za-z0-9\\+-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*((\\.[A-Za-z]{2,}){1}$)");
	
	/**
	 * Validate the email address
	 * 
	 * @param value The email address to validate
	 * @return True if the value is a valid email address
	 */
	public static boolean isValidEmail(String value) {
		return ValidationUtils.match(value, ValidationUtils.EMAIL_PATTERN);
	}
	
	private static boolean match(String value, Pattern pattern) {
		return StringUtils.isNotEmpty(value) && pattern.matcher(value).matches();
	}
	
	/**
	 * Validate the URL
	 * 
	 * @param value The URL to validate
	 * @return True if the value is a valid URL
	 */
	public static boolean isValidURL(String value) {
		try {
			new URL(value);
			return true;
		} catch (MalformedURLException ex) {
			return false;
		}
	}
	
	/**
	 * Validate the URL without protocol
	 * 
	 * @param value The URL to validate
	 * @return True if the value is a valid URL
	 */
	public static boolean isValidURLWithoutProtocol(String value) {
		return isValidURL("http://" + value);
	}
	
	public static boolean isValidDouble(String number) {
		try {
			Double.parseDouble(number);
			return true;
		} catch (Exception e) {
			return false;
		}
	}
}