使用Java从html标记中提取内容

Question

I extracted data from an html page and then parsed the tags containing tags like this now I tried different ways like extracting substring etc do extract only the title and href tags. but it'snot working..Can anyone help me. This is the small snippet of my output

my code

     doc  = Jsoup.connect("myurl").get();

    Elements link = doc.select("a[href]");
    String stringLink = null;
    for (int i = 0; i < link.size(); i++) 
    {

        stringLink = link.toString();
        System.out.println(stringLink);
     }

output

<a class="link" title="Waf Ad" href="https://www.facebook.com/waf.ad.54" 
data- jsid="anchor" target="_blank"><img class="_s0 _rw img" src="https:
//fbcdn-profile-a.akamaihd.net/hprofile-ak-ash1/t5/186729_100007938933785_
508764241_q.jpg" alt="Waf Ad" data-jsid="img" /></a>
<a class="link" title="Ana Ga" href="https://www.facebook.com/ata.ga.31392410" 
data-jsid="anchor" target="_blank"><img class="_s0 _rw img" src="https://
fbcdn-profile-a.akamaihd.net/hprofile-ak-ash1/t5/186901_100002334679352_
162381693_q.jpg" alt="Ana Ga" data-jsid="img" /></a>

Answer 1

You can use the attr() method of Element class to extract the value of attributes.

For example:

String href = link.attr("href");
String title = link.attr("title");

See this page for more: Extract attributes, text, and HTML from elements

Answer 2

To get the page title, you can use

Document doc = Jsoup.connect("myurl").get();
String title = doc.title();

For getting the individual links from the different hrefs, you can use this

Elements links = doc.select("a[href]");
for(Element ele : links) {
    System.out.println(ele.attr("href").toString());
}  

attr() method gives the content inside the matching attributed spedified to it in the given tag.

Answer 3

public class Solution{
    public static void main(String[] args){

         Scanner scan = new Scanner(System.in);
        int testCases = Integer.parseInt(scan.nextLine());

        while (testCases-- > 0) {
            String line = scan.nextLine();

            boolean matchFound = false;
            Pattern r = Pattern.compile("<(.+)>([^<]+)</\\1>");
            Matcher m = r.matcher(line);

            while (m.find()) {
                System.out.println(m.group(2));
                matchFound = true;
            }
            if ( ! matchFound) {
                System.out.println("None");
            }
        }
    }
}

REGULAR EXPRESSION EXPLAINATION: