Broken Link Check

Question

需要专门用于标记的断开链接检查

这是当前可用于其他标签（img，a）但不适用于源代码的代码：

List<String> srctag = new ArrayList<String>();
       String homePage = urlname;
               String url = "";
        HttpURLConnection huc = null;
        int respCode = 200;

        Dimension dimension= new Dimension(500, 700 );
        driver.manage().window().setSize(dimension);
        driver.get(homePage);

        List<WebElement> links = driver.findElements(By.tagName("source"));

        Iterator<WebElement> it = links.iterator();

        while(it.hasNext()){

            url = it.next().getAttribute("srcset");

            System.out.println(url);

            if(url == null || url.isEmpty()){
System.out.println("URL is either not configured for anchor tag or it is empty");
                continue;
            }


            try {
                huc = (HttpURLConnection)(new URL(url).openConnection());

                huc.setRequestMethod("GET");

                huc.connect();

                respCode = huc.getResponseCode();

                if(respCode >= 400){
                    System.out.println(url+" is a broken link");
                 srctag.add(url+" is a broken link");
                }
                else{
                    System.out.println(url+" is a valid link");
                    srctag.add(url+" is a valid link");
                }

            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

错误：java.net.MalformedURLException：无协议：//sample.png在java.net.URL。（未知来源）