Java网页资源抓取例子（使用第三方包Jsoup解析Html）

直接上代码:

import java.io.IOException;
import java.util.ArrayList;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;


public class Test {
	
	public static void main(String[] args) throws IOException {
		ArrayList imageUrlBuilder = new ArrayList();
		ArrayList httpUrlBuilder = new ArrayList();
		
		httpUrlBuilder.add("http://news.baidu.com/");
		int i = 0;
		String url = null;
		
		while((url = httpUrlBuilder.get(i))!= null){
			try{
				Document doc = Jsoup.connect(url).get();
				System.out.println("==============当前url"+url+"下有图片链接===============");
				Elements imgLinks = doc.getElementsByTag("img");
				for (Element link : imgLinks) {
				  String linkHref = link.attr("src");
				  
				  if(linkHref.startsWith("http")){
					  imageUrlBuilder.add(linkHref);
					  System.out.println(linkHref);
				  }
				}
				
				Elements links = doc.getElementsByTag("a");
				for (Element link : links) {
					  String linkHref = link.attr("href");
					  //如果数组中含有此链接字符串就不添加
					  if(linkHref.startsWith("http")&&!httpUrlBuilder.contains(linkHref)){
						  httpUrlBuilder.add(linkHref);
					  }
				}
			}catch(Exception e){
				continue;
			}
			System.out.println();
			System.out.println("httpUrl数目"+httpUrlBuilder.size());
			i++;
		
		}
		
		
		
	}

}

第三方包下载地址:http://jsoup.org/download