java - 解析节点内部的XML

XML格式

<?xml version="1.0"?>
<Employees>
    <Employee emplid="1111" type="admin">
        <firstname>John</firstname>
        <lastname>Watson</lastname>
        <age>30</age>
        <email>[email protected]</email>
    </Employee>
    <Employee emplid="2222" type="admin">
        <firstname>Sherlock</firstname>
        <lastname>Homes</lastname>
        <age>32</age>
        <email>[email protected]</email>
    </Employee>
    <Employee emplid="3333" type="user">
        <firstname>Jim</firstname>
        <lastname>Moriarty</lastname>
        <age>52</age>
        <email>[email protected]</email>
    </Employee>
    <Employee emplid="4444" type="user">
        <firstname>Mycroft</firstname>
        <lastname>Holmes</lastname>
        <age>41</age>
        <email>[email protected]</email>
    </Employee>
</Employees>

码

FileInputStream file = new FileInputStream(new File("/Users/Desktop/employees.xml"));
DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder =  builderFactory.newDocumentBuilder();
Document xmlDocument = builder.parse(file);
XPath xPath =  XPathFactory.newInstance().newXPath();
System.out.println("*************************");
String expression = "/Employees/Employee/firstname";
System.out.println(expression);
NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(xmlDocument, XPathConstants.NODESET);
for (int i = 0; i < nodeList.getLength(); i++) {
    System.out.println(nodeList.item(i).getFirstChild().getNodeValue());
}

通过使用上面的代码，我设法获取了John,Sherlock,Jim,Mycroft。如果我想获得emplid="1111" type="admin" John,emplid="2222" type="admin" Sherlock,emplid="3333" type="user" Jim,emplid="4444" type="user" Mycroft怎么办。高度赞赏任何建议或参考链接。

最佳答案

看看@ API：

String expression = "/Employees/Employee";
NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(xmlDocument, XPathConstants.NODESET);

for (int i = 0; i < nodeList.getLength(); i++) {
    Node employeeNode = nodeList.item(i);
    String emplId = employeeNode.getAttributes().getNamedItem("emplid").getNodeValue();
}

（http://docs.oracle.com/javase/6/docs/api/org/w3c/dom/Node.html#getAttributes()）