Full Link Extraction using java

Question

My goal is to always get the same string (which is the URI in my case) while reading the href property from a link. Example: Suppose think that a html file it have somany li

Answer 1

You can do this using a fullworthy HTML parser like Jsoup. There's a Node#absUrl() which does exactly what you want.

package com.stackoverflow.q3394298;

import java.net.URL;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;

public class Test {
    
    public static void main(String... args) throws Exception {
        URL url = new URL("https://stackoverflow.com/questions/3394298/");
        Document document = Jsoup.connect(url).get();
        Element link = document.select("a.question-hyperlink").first();
        System.out.println(link.attr("href"));
        System.out.println(link.absUrl("href"));
    }
    
}

which prints (correctly) the following for the title link of your current question:

/questions/3394298/full-link-extraction-using-java
https://stackoverflow.com/questions/3394298/full-link-extraction-using-java

Jsoup may have more other (undiscovered) advantages for your purpose as well.

Related questions:

• What are the pros and cons of the leading HTML parsers in Java?

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Update: if you want to select all links in the document, then do as follows:

        Elements links = document.select("a");
        for (Element link : links) {
            System.out.println(link.attr("href"));
            System.out.println(link.absUrl("href"));
        }