java - 使用Java获得XML的特定值(value)

我有如下的XML。如果EServiceId是使用Java的“ ESRVC2”，如何循环和获取Tag ClientInfo的值？

<EServiceInfo>
    <EServiceId>ESRVC1</EServiceId>
    <Clients>
        <ClientInfo>
            <ClientEntityID>T1511111F</ClientEntityID>
            <ClientEntityType>UEN</ClientEntityType>
        </ClientInfo>
        <ClientInfo>
            <ClientEntityID>190000001W</ClientEntityID>
            <ClientEntityType>UEN</ClientEntityType>
        </ClientInfo>
    </Clients>
</EServiceInfo>
<EServiceInfo>
    <EServiceId>ESRVC2</EServiceId>
    <Clients>
        <ClientInfo>
            <ClientEntityID>T1522222F</ClientEntityID>
            <ClientEntityType>UEN</ClientEntityType>
        </ClientInfo>
        <ClientInfo>
            <ClientEntityID>190000002W</ClientEntityID>
            <ClientEntityType>UEN</ClientEntityType>
        </ClientInfo>
    </Clients>
</EServiceInfo>

最佳答案

这是我尝试的答案。但是看起来它将返回所有4个ClientInfo。

NodeList nEserviceInfoList = doc.getElementsByTagName("EServiceInfo");
        for (int i = 0; i < nEserviceInfoList.getLength(); i++) {

            Node nNode = nEserviceInfoList.item(i);
            System.out.println("\nCurrent Element: " + nNode.getNodeName());

            if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                Element elem = (Element) nNode;
                Node node1 = elem.getElementsByTagName("EServiceId").item(0);
                String nEServiceId = node1.getTextContent();

                System.out.println("EServiceId: " + nEServiceId);

                NodeList nClientList = doc.getElementsByTagName("ClientInfo");

                for (int j = 0; j < nClientList.getLength(); j++) {

                    Node nClientNode = nClientList.item(j);

                    System.out.println("\nCurrent Element: " + nClientNode.getNodeName());
                    if (nClientNode.getNodeType() == Node.ELEMENT_NODE) {
                        Element elemClient = (Element) nClientNode;
                        Node node3 = elemClient.getElementsByTagName("ClientEntityID").item(0);
                        String nClientEntityID = node3.getTextContent();

                        Node node4 = elemClient.getElementsByTagName("ClientEntityType").item(0);
                        String nClientEntityType = node4.getTextContent();

                        System.out.println("ClientEntityID: "+ nClientEntityID);
                        System.out.println("ClientEntityType: "+ nClientEntityType);

                    }
                }
            }
        }