[Q#15518845][A#15518922] How to validate URL in java using regex?

https://stackoverflow.com/q/15518845

I want to validate url started with http/https/www/ftp and checks for /\ slashes and checks for .com,.org etc at the end of URL using regular expression. Is there any regex patttern for URL validation?

Answer

https://stackoverflow.com/a/15518922

This works:

APIzation

Pattern p = Pattern.compile("(@)?(href=')?(HREF=')?(HREF=\")?(href=\")?(http://)?[a-zA-Z_0-9\\-]+(\\.\\w[a-zA-Z_0-9\\-]+)+(/[#&\\n\\-=?\\+\\%/\\.\\w]+)?");  

    Matcher m = p.matcher("your url here");

package com.stackoverflow.api;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Human15518922 {

  public static boolean validateURLInJavaUsingRegex(String url) {
    Pattern p = Pattern.compile(
      "(@)?(href=')?(HREF=')?(HREF=\")?(href=\")?(http://)?[a-zA-Z_0-9\\-]+(\\.\\w[a-zA-Z_0-9\\-]+)+(/[#&\\n\\-=?\\+\\%/\\.\\w]+)?"
    );

    Matcher m = p.matcher(url);
    return m.matches();
  }
}

package com.stackoverflow.api;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * How to validate URL in java using regex?
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/15518922">https://stackoverflow.com/a/15518922</a>
 */
public class APIzator15518922 {

  public static Matcher validateUrl() throws Exception {
    Pattern p = Pattern.compile(
      "(@)?(href=')?(HREF=')?(HREF=\")?(href=\")?(http://)?[a-zA-Z_0-9\\-]+(\\.\\w[a-zA-Z_0-9\\-]+)+(/[#&amp;\\n\\-=?\\+\\%/\\.\\w]+)?"
    );
    return p.matcher("your url here");
  }
}