Question

我使用getElementBytag方法从以下XML文档中提取数据（Yahoo finance news api http://finance.yahoo.com/rss/topfinstories）

我使用以下代码。使用getelementsBytag方法获取新项目和标题没问题，但由于某些原因，在按标签搜索时不会选择链接。它只获取link元素的结束标记。这是XML文档的问题还是jsoup的问题？

import java.io.IOException;         
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;   

class GetNewsXML {
    /**
     * @param args
     */
    /**
     * @param args
     */
    public static void main(String args[]){
        Document doc = null;
        String con = "http://finance.yahoo.com/rss/topfinstories";
        try {
            doc = Jsoup.connect(con).get();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        Elements collection = doc.getElementsByTag("item");// Gets each news item
        for (Element c: collection){
            System.out.println(c.getElementsByTag("title"));
        }
        for (Element c: collection){
            System.out.println(c.getElementsByTag("link"));
        }
    }

Answer 1

你得到<link /> http://...;该链接将在<{em> link - 标记后作为文本节点。

但这不是问题：

final String url = "http://finance.yahoo.com/rss/topfinstories"; Document doc = Jsoup.connect(url).get(); for( Element item : doc.select("item") ) { final String title = item.select("title").first().text(); final String description = item.select("description").first().text(); final String link = item.select("link").first().nextSibling().toString(); System.out.println(title); System.out.println(description); System.out.println(link); System.out.println(""); }

<强>解释

item.select("link") // Select the 'link' element of the item .first() // Retrieve the first Element found (since there's only one) .nextSibling() // Get the next Sibling after the one found; its the TextNode with the real URL .toString() // Get it as a String

使用您的链接，此示例将打印所有元素：

Tax Day Freebies and Deals You made it through tax season. Reward yourself by taking advantage of some special deals on April 15. http://us.rd.yahoo.com/finance/news/rss/story/SIG=14eetvku9/*http%3A//us.rd.yahoo.com/finance/news/topfinstories/SIG=12btdp321/*http%3A//finance.yahoo.com/news/tax-day-freebies-and-deals-133544366.html?l=1 (...)

无法从XML中提取数据

1 个答案: