在Java中传递多个xpath时在NodeList中查找节点编号

XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression expr1 = xpath.compile("//book/title");
XPathExpression expr2 = xpath.compile("//book/author");

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(new File("example.xml"));

NodeList nodeList1 = (NodeList) expr1.evaluate(doc, XPathConstants.NODESET);
NodeList nodeList2 = (NodeList) expr2.evaluate(doc, XPathConstants.NODESET);

int nodeNumber = -1;
for (int i = 0; i < nodeList1.getLength(); i++) {
    if (nodeList1.item(i).isEqualNode(nodeList2.item(i))) {
        nodeNumber = i;
        break;
    }
}

System.out.println("节点编号为：" + nodeNumber);