获取网页源代码后，网页运行Javascript - Java

我试图获取网页源，我发现了一些问题。我想获取源上的Url，但是当我取下来时，Url变成了Javascript方法。

浏览器源代码查看器:

<a class="title" href="/hkstp_web/en/Directory/Acquest%20Stem%20Cell%20Research%20Company%20Limited/">aaa Company Limited</a>

但是当我把它拿下来的时候，它变成了这样:

<a href="javascript:void(0)"><span>...</span></a>

public class DownloadPage {
    public static void main(String[] args) {
        URL url;
        try {
            // get URL content
            url = new URL("https://www.hkstp.org/hkstp_web/en/directory/");
            URLConnection conn = url.openConnection();
            // open the stream and put it into BufferedReader
            BufferedReader br = new BufferedReader(
                               new InputStreamReader(conn.getInputStream()));
            String inputLine;
            //save to this filename
            String fileName = "C:''Users''USER''Documents''server''test.txt";
            File file = new File(fileName);
            if (!file.exists()) {
                file.createNewFile();
            }
            //use FileWriter to write file
            FileWriter fw = new FileWriter(file.getAbsoluteFile());
            BufferedWriter bw = new BufferedWriter(fw);
            while ((inputLine = br.readLine()) != null) {
                bw.write(inputLine + "'n");
            }
            bw.close();
            br.close();
            System.out.println("Done");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

我如何得到正确的链接?由于