我正在開發一個應顯示貨幣匯率的項目,因此我打算調用另一個網頁以獲取該頁面的匯率值。我嘗試了Angular-js,但是我無法獲得網頁的響應(在Angular JS中:我們只能調用JSON/Rest url)。我在XMLHttpRequest中嘗試過,但如果我們調用它,它將不會調用網頁(url)來自其他域的網頁(CORE的Beacuse)。需要解析其他網頁的值。首先,我需要調用其他網頁並從中解析XML值
同樣,我嘗試了Java,併成功地調用了網頁並獲得了XML,但我無法解析該值(出現錯誤:「未格式化的XML」)。
有人可以引導我,我怎麼能從任何網頁獲得價值。請讓我知道,無論如何,我可以通過使用API調用或任何Web服務調用來實現。如果我使用API或Web服務調用,那麼我是否需要與MoneyExchange網站的IT供應商進行通信,以便使API/Web服務消耗特定的值。
請幫我在同一個(我願意在任何技術來實現)
Java代碼:
package webXMRead;
import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URISyntaxException; import java.net.URL;
import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.util.EntityUtils; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList;
public class webPageXMLRead { public static void main(String args[]) throws URISyntaxException, ClientProtocolException, IOException, MalformedURLException {
//For study and example purpose I took url: http://www.google.com , need to parse this website, I am not using for any profit purpose
String url = " http://www.google.com "; System.out.println("Url is careated****"); URL url2 = new URL(url); HttpGet httpGet = new HttpGet(url); HttpClient httpClient = new DefaultHttpClient();HttpResponse httpResponse = httpClient.execute(httpGet); HttpEntity entity = httpResponse.getEntity(); System.out.println("Entity is*****" + entity); try { String xmlParseString = EntityUtils.toString(entity); System.out.println("This Stirng ***" + xmlParseString); HttpURLConnection connection = (HttpURLConnection) url2 .openConnection(); InputStream inputStream = connection.getInputStream(); DocumentBuilderFactory builderFactory = DocumentBuilderFactory .newInstance(); DocumentBuilder documentBuilder = builderFactory .newDocumentBuilder(); Document document = documentBuilder.parse(inputStream); document.getDocumentElement().normalize(); NodeList nodeList = document.getElementsByTagName("rss"); System.out.println("This is firstnode" + nodeList); for (int getChild = 0; getChild < nodeList.getLength(); getChild++) { Node Listnode = nodeList.item(getChild); System.out.println("Into the for loop" + Listnode.getAttributes().getLength()); Element firstnoderss = (Element) Listnode; System.out.println("ListNodes" + Listnode.getAttributes()); System.out.println("This is node list length" + nodeList.getLength()); Node Subnode = nodeList.item(getChild); System.out.println("This is list node" + Subnode); } } catch (Exception exception) { System.out.println("Exception is" + exception); } }
角JS:(我只是試圖檢查其是否返回任何任何值,但沒有成功。但我在XMLHttpRequest(javascript)時遇到CORS問題,當我嘗試在不同的域)
Angular-JS代碼:
<!DOCTYPE html>
<html>
<head>
<title>test your webservice</title>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<article ng-app="webpage">
<section ng-controller="booksCtrl">
<h2 >{{data}} </h2>
</section>
</article>
<script type="text/javascript">
var app = angular.module('webpage', []);
app.controller('booksCtrl', function($scope, $http) {
/* $httpProvider.defaults.useXDomain = true;*/
/*delete $http.defaults.headers.common['X-Requested-With'];*/
/*just for study purpose, not for any profit usage, so for example purpose I used URL:http://www.google.com, */
$http.get("http://www.google.com")
.then(function(response) {
$scope.data=response.data;
},
function(errresponse) {
alert("err"+errresponse.status);
});
});
</script>
</body>
</html>
您想從支持JSONP獲取數據的其他網站?請參閱https://remysharp.com/2007/10/08/what-is-jsonp –
@SteveJorgensen,感謝您的更新,現在我使用** [jsoup](http://jsoup.org/)獲得瞭解決方案。 ** – Vasant