无法使用StAX查找属性

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

public class StAXExample {
    public static void main(String[] args) {
        try {
            XMLInputFactory factory = XMLInputFactory.newInstance();
            XMLStreamReader reader = factory.createXMLStreamReader(new FileInputStream("example.xml"));

            while (reader.hasNext()) {
                int event = reader.next();

                if (event == XMLStreamReader.START_ELEMENT) {
                    String elementName = reader.getLocalName();

                    if (elementName.equals("exampleElement")) {
                        String attributeValue = reader.getAttributeValue(null, "exampleAttribute");
                        System.out.println("Attribute value: " + attributeValue);
                    }
                }
            }

            reader.close();
        } catch (XMLStreamException | FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}