Java URL is Absolute getAbsoluteURL(String url, URL base)

Description

interprets url w.r.t base and returns the corresponding absolute URL (only if url is indeed a relative URL ; returns the original url otherwise)

License

Open Source License

Declaration

public static URL getAbsoluteURL(String url, URL base) 

Method Source Code

//package com.java2s;

import java.net.URL;
import java.net.MalformedURLException;

public class Main {
    /**//from  ww  w .ja v  a2  s .c o m
     *interprets url w.r.t base and returns the corresponding absolute URL (only if url is indeed a relative URL ; returns the original url otherwise)
     */
    public static URL getAbsoluteURL(String url, URL base) {
        URL res = null;
        if (url.startsWith("http:") || url.startsWith("file:") || url.startsWith("ftp:")) {
            //url seems to be an absolute URL
            try {//try to instantiate it, return null if it fails for some reason
                res = new URL(url);
                return res;
            } catch (MalformedURLException mue) {
                System.err.println("Error:Utils.getAbsoluteURL():malformed URL: " + url);
                mue.printStackTrace();
                return null;
            }
        } else {//url seems to be a relative URL
            try {//try to interpret it w.r.t base
                res = new URL(new URL(base.toString().substring(0, base.toString().lastIndexOf("/") + 1)), url);
                return res;
            } catch (MalformedURLException mue) {
                System.err.println("Error:Utils.getAbsoluteURL():malformed URL: " + url);
                mue.printStackTrace();
                return null;
            }
        }
    }
}

Related

1. getAbsoluteUrl(String base_url, String rel_url)
2. getAbsoluteURL(String baseUrl, String url)
3. getAbsoluteURL(String baseURLString, String relURlString)
4. getAbsoluteURL(String relativeURL, String baseURL)
5. getAbsoluteUrl(URL baseUrl, String relativeUrl)
6. getAbsoluteUrlFromFile(final String file)
7. getAbsoluteUrlPathFromFile(String file)
8. isAbsolute(String uri)