Szkoda, że nie dołączyłeś kodu. Oto działający snippet http://rextester.com/RQV94581
//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_72
import java.util.*;
import java.lang.*;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.bind.*;
import javax.xml.stream.*;
import javax.xml.transform.stream.StreamSource;
import javax.xml.bind.annotation.*;
@XmlRootElement(name="tabela_kursow")
class MyObject {
String tableNumber;
@XmlElement(name="numer_tabeli")
public void setTableNumber(String v) {
tableNumber = v;
}
public String getTableNumber() {
return tableNumber;
}
};
class Rextester
{
public static void main(String args[]) throws Exception
{
v3();
}
private static void v3() throws Exception {
URL url = new URL("http://www.nbp.pl/kursy/xml/a002z020103.xml");
URLConnection connection = url.openConnection();
JAXBContext jc = JAXBContext.newInstance(MyObject.class);
XMLInputFactory xif = XMLInputFactory.newFactory();
xif.setProperty(XMLInputFactory.SUPPORT_DTD, false);
//XMLStreamReader xsr = xif.createXMLStreamReader(new StreamSource("c.xml"));
XMLStreamReader xsr = xif.createXMLStreamReader(connection.getInputStream());
Unmarshaller unmarshaller = jc.createUnmarshaller();
MyObject myObject = (MyObject) unmarshaller.unmarshal(xsr);
System.out.println(myObject);
System.out.println(myObject.getTableNumber());
}
}