这个示例程序将展示如何从一个URL获得一个页面。然后提取页面中的所有链接、图片和其它辅助内容。并检查URLs和文本信息。
运行下面程序需要指定一个URLs作为参数
import org.jsoup.Jsoup;
import org.jsoup.helper.Validate;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
/**
* Example program to list links from a URL.
*/
public class ListLinks {
public static void main(String[] args) throws IOException {
Validate.isTrue(args.length == 1, "usage: supply url to fetch");
String url = args[0];
print("Fetching %s...", url);
Document doc = Jsoup.connect(url).get();
Elements links = doc.select("a[href]");
Elements media = doc.select("[src]");
Elements imports = doc.select("link[href]");
print("\nMedia: (%d)", media.size());
for (Element src : media) {
if (src.tagName().equals("img"))
print(" * %s: <%s> %sx%s (%s)",
src.tagName(), src.attr("abs:src"), src.attr("width"), src.attr("height"),
trim(src.attr("alt"), 20));
else
print(" * %s: <%s>", src.tagName(), src.attr("abs:src"));
}
print("\nImports: (%d)", imports.size());
for (Element link : imports) {
print(" * %s <%s> (%s)", link.tagName(),link.attr("abs:href"), link.attr("rel"));
}
print("\nLinks: (%d)", links.size());
for (Element link : links) {
print(" * a: <%s> (%s)", link.attr("abs:href"), trim(link.text(), 35));
}
}
private static void print(String msg, Object... args) {
System.out.println(String.format(msg, args));
}
private static String trim(String s, int width) {
if (s.length() > width)
return s.substring(0, width-1) + ".";
else
return s;
}
}示例输入结果
Fetching http://news.ycombinator.com/...
Media: (38)
* img: <http://ycombinator.com/images/y18.gif> 18x18 ()
* img: <http://ycombinator.com/images/s.gif> 10x1 ()
* img: <http://ycombinator.com/images/grayarrow.gif> x ()
* img: <http://ycombinator.com/images/s.gif> 0x10 ()
* script: <http://www.co2stats.com/propres.php?s=1138>
* img: <http://ycombinator.com/images/s.gif> 15x1 ()
* img: <http://ycombinator.com/images/hnsearch.png> x ()
* img: <http://ycombinator.com/images/s.gif> 25x1 ()
* img: <http://mixpanel.com/site_media/images/mixpanel_partner_logo_borderless.gif> x (Analytics by Mixpan.)
Imports: (2)
* link <http://ycombinator.com/news.css> (stylesheet)
* link <http://ycombinator.com/favicon.ico> (shortcut icon)
Links: (141)
* a: <http://ycombinator.com> ()
* a: <http://news.ycombinator.com/news> (Hacker News)
* a: <http://news.ycombinator.com/newest> (new)
* a: <http://news.ycombinator.com/newcomments> (comments)
* a: <http://news.ycombinator.com/leaders> (leaders)
* a: <http://news.ycombinator.com/jobs> (jobs)
* a: <http://news.ycombinator.com/submit> (submit)
* a: <http://news.ycombinator.com/x?fnid=JKhQjfU7gW> (login)
* a: <http://news.ycombinator.com/vote?for=1094578&dir=up&whence=%6e%65%77%73> ()
* a: <http://www.readwriteweb.com/archives/facebook_gets_faster_debuts_homegrown_php_compiler.php?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+readwriteweb+%28ReadWriteWeb%29&utm_content=Twitter> (Facebook speeds up PHP)
* a: <http://news.ycombinator.com/user?id=mcxx> (mcxx)
* a: <http://news.ycombinator.com/item?id=1094578> (9 comments)
* a: <http://news.ycombinator.com/vote?for=1094649&dir=up&whence=%6e%65%77%73> ()
* a: <http://groups.google.com/group/django-developers/msg/a65fbbc8effcd914> ("Tough. Django produces XHTML.")
* a: <http://news.ycombinator.com/user?id=andybak> (andybak)
* a: <http://news.ycombinator.com/item?id=1094649> (3 comments)
* a: <http://news.ycombinator.com/vote?for=1093927&dir=up&whence=%6e%65%77%73> ()
* a: <http://news.ycombinator.com/x?fnid=p2sdPLE7Ce> (More)
* a: <http://news.ycombinator.com/lists> (Lists)
* a: <http://news.ycombinator.com/rss> (RSS)
* a: <http://ycombinator.com/bookmarklet.html> (Bookmarklet)
* a: <http://ycombinator.com/newsguidelines.html> (Guidelines)
* a: <http://ycombinator.com/newsfaq.html> (FAQ)
* a: <http://ycombinator.com/newsnews.html> (News News)
* a: <http://news.ycombinator.com/item?id=363> (Feature Requests)
* a: <http://ycombinator.com> (Y Combinator)
* a: <http://ycombinator.com/w2010.html> (Apply)
* a: <http://ycombinator.com/lib.html> (Library)
* a: <http://www.webmynd.com/html/hackernews.html> ()
* a: <http://mixpanel.com/?from=yc> ()