Question

我有一个看起来像

的xml

<?xml version="1.0"?>
<company>
    <staff>
        <firstname>John</firstname>
        <lastname>Player</lastname>
        <nickname>JP</nickname>
        <salary>1000</salary>
    </staff>
    <staff>
        <firstname>Peter</firstname>
        <lastname>Shaw</lastname>
        <nickname>PS</nickname>
        <salary>2000</salary>
    </staff>
</company>

我只需要在名字是彼得时选择，即我的o / p应该是：

        <staff>
            <firstname>Peter</firstname>
            <lastname>Shaw</lastname>
            <nickname>PS</nickname>
            <salary>2000</salary>
        </staff>

我正在使用XPath，示例代码如下：

XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    XPathExpression expr = xpath.compile("./company[staff/firstname = 'Peter']");

    Object result = expr.evaluate(doc, XPathConstants.NODESET);
    System.out.println("Print  " + result);  //comes as com.sun.org.apache.xml.internal.dtm.ref.DTMNodeList@ef0cdb
    NodeList nodes = (NodeList) result; 
    System.out.println("Size"+ nodes.getLength()); // comes as 0
    for (int i = 0; i < nodes.getLength(); i++) {
        System.out.println(nodes.item(i).getNodeValue());
    }

请提供指导

Answer 1

您的XPath表达式将选择一个{em}至少至少一名名为Peter的职员。{/ p>

您真正想要的是选择<company>级别：

<staff>

根据成员标记值拆分XML

1 个答案: