Question

我需要在java中创建一个可以解析xml doc的应用程序（我写的是USD，我应该得到它的回报率） http://www.bnr.ro/nbrfxrates.xml 我的代码现在看起来像：

package bnr;

import java.net.URL;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;


public class Bnr {

    /**
     * @param args the command line arguments
     */

    String url = "http://www.bnr.ro/nbrfxrates.xml";
    public static void main(String[] args) {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(new URL(url).openStream());
    }
}

并且它无法正常工作我得到一个解析错误。你能告诉我它有什么问题吗？谢谢，

Answer 1

我尝试你的代码..它没有编译，因为你在静态方法中使用非静态变量，你需要在main中声明url

要获得结果，您需要添加变换器对象

public static void main(String[] args) {
    try {
        String url="http://www.bnr.ro/nbrfxrates.xml";
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(new URL(url).openStream());
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();
        StringWriter writer = new StringWriter();
        transformer.transform(new DOMSource(doc), new StreamResult(writer));
        String output = writer.getBuffer().toString();
        System.out.println(output.trim());

Answer 2

我找到了解决方案，这是一个有效的代码：

public static void main(String[] args) throws SAXException, IOException  {
        URL oracle = new URL("http://www.bnr.ro/nbrfxrates.xml");
        URLConnection yc = oracle.openConnection();
        BufferedReader in = new BufferedReader(new InputStreamReader(
                                yc.getInputStream()));
        String inputLine;
        while ((inputLine = in.readLine()) != null) 
            System.out.println(inputLine);
        in.close();



    }

Java从url解析xml

2 个答案: