无法使用JAVA从网站提取xml数据

我正在尝试在JAVA中以给定的纬度和经度提取酒店名称的数据。 我收到以下错误：[致命错误]：1：1：prolog中不允许内容。 这是我尝试提取信息的代码和URL。 关于这个问题的任何建议？

URL url = new URL("https://api.eancdn.com/ean-services/rs/hotel/v3/list?apiKey=vkndmgahz5aekd65pxg4rvvp&locale=en_US&currencyCode=USD&latitude=51.514&longitude=-0.269""); InputStream is = url.openStream(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(is); NodeList itemList = doc.getElementsByTagName("HotelSummary"); Node itemNode; Element itemElt; for(int k=0; k < itemList.getLength(); k++) { itemNode = itemList.item(k); if(itemNode.getNodeType() == Node.ELEMENT_NODE) { itemElt = (Element) itemNode; System.out.println("Hotel name: "+itemElt.getElementsByTagName("name").item(0).getTextContent()); 

Answer 1

什么事都错了

如果运行以下代码，您将看到要获取的数据不是XML，而是JSON。

 import java.net.URL; import java.io.InputStream; public class Demo { public static void main(String[] args) throws Exception { URL url = new URL("https://api.eancdn.com/ean-services/rs/hotel/v3/list?apiKey=vkndmgahz5aekd65pxg4rvvp&locale=en_US&currencyCode=USD&latitude=51.514&longitude=-0.269"); InputStream is = url.openStream(); int next = is.read(); while(next != -1) { System.out.print((char) next); next = is.read(); } } } 

将数据作为XML获取

您可以使用HttpURLConnection以XML格式请求数据：

 import java.net.HttpURLConnection; import java.net.URL; import java.io.InputStream; import javax.xml.parsers.*; import org.w3c.dom.Document; public class Demo { public static void main(String[] args) throws Exception { URL url = new URL("https://api.eancdn.com/ean-services/rs/hotel/v3/list?apiKey=vkndmgahz5aekd65pxg4rvvp&locale=en_US&currencyCode=USD&latitude=51.514&longitude=-0.269"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setRequestProperty("Accept", "application/xml"); InputStream is = connection.getInputStream(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(is); } }