URL中的Java变量不起作用

Question

So basically i have a script that's downloading a txt file contents off a website. It works but i wanted to add variables to the link so it's custom to each user. So just as an example i wanted it to be like:

String name = "Matt";
String URLComplete = "http://www.domain.com/" + name + "/test.txt";
URL url = new URL(URLComplete);

That doesn't work but if i did

URL url = new URL("http://www.domain.com/Matt/test.txt");

It would work, i don't understand what i'm doing wrong?

---

So even if i do the following:

String URLComplete = "http://www.domain.com/name/test.txt";

URL url = new URL(URLComplete);

It doesn't work but if i do

URL url = new URL("http://www.domain.com/name/test.txt");

It will work, by work i mean it successfully reads/downloads in the string/array from the website. I've outputted both and the urls are identical no mistakes i've visited both through my browser and i end up at the correct page.

---

Full Code:

This is my full code of retrieving the data.

public class Retrieve {


    public static List<String> getWhitelist()
    {
        try
        {

            String name = "Matt";
            String URLComplete = "http://www.domain.com/" + name + "/test.txt";

            List<String> strings = new ArrayList();
            URL url = new URL(URLComplete);
            BufferedReader urlReader = new BufferedReader(new InputStreamReader(url.openStream()));
            String s;
            while ((s = urlReader.readLine()) != null)
            {
                strings.add(s);
            }
            return strings;
        }
        catch (Exception e) {}
        return new ArrayList<String>();
    }


    public static String downloadString(String link)
    {
        try
        {
            URL url = new URL(link);
            BufferedReader result = new BufferedReader(new InputStreamReader(url.openStream()));
            return result.readLine();
        }
        catch (Exception e) {}
        return "Unable to connect to the internet!";
    }



}

Answer 1

Try this following the below example

    URL gamelan = new URL("http", "example.com", 80, "pages/page1.html"); 

which is equivalent to

   http://example.com:80/pages/page1.html

for more examples click here