Month: November 2010

How to validate URL in Java

A short example to show the use of apache.commons.validator.UrlValidator class to validate an URL in Java.

import org.apache.commons.validator.UrlValidator;
 
public class ValidateUrlExample{
 
	public static void main(String[] args) {
 
	    UrlValidator urlValidator = new UrlValidator();
 
	    // valid URL
	    if (urlValidator.isValid("http://www.ziben.com.br")) {
	       System.out.println("url is valid");
	    } else {
	       System.out.println("url is invalid");
	    }
 
	    // invalid URL
	    if (urlValidator.isValid("http://invalidURL^$&%$&^")) {
	        System.out.println("url is valid");
	    } else {
	        System.out.println("url is invalid");
	    }
 
	}
}

Output

url is valid
url is invalid

Reference

  1. http://commons.apache.org/validator/apidocs/org/apache/commons/validator/UrlValidator.html