提取 html 中的所有链接、图片和媒体代码,Java代码库,德仔网

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【Java】提取 html 中的所有链接、图片和媒体

作者:liuyan814 / 发布于2014/9/22/ 592


	package org.jsoup.examples;

	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;
	 }
	}

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