package cn.evan.util; import java.io.IOException; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; public class SemanticCrawl {     public static void main(String[] args) {         Document doc = null;         try {             doc = Jsoup.connect("网址").get();         } catch (IOException e) {             // TODO Auto-generated catch block             e.printStackTrace();         }         String title = doc.title();         Elements metas = doc.head().select("meta");          for (Element meta : metas) {              String content = meta.attr("content");              if ("keywords".equalsIgnoreCase(meta.attr("name"))) {                  System.out.println("关键字："+content);              }              if ("description".equalsIgnoreCase(meta.attr("name"))) {                  System.out.println("网站内容描述:"+content);              }          }          Elements keywords = doc.getElementsByTag("meta");         System.out.println("标题"+title);     } }