Question

我想使用XPath从xml字符串中提取“ImageUID”元素值（即{7f2535d0-9a41-4997-9694-0a4de569e6d9}）和“URL128”元素值（即http://cachens.corbis.com/CorbisImage/thumb/15/53/42/15534232/42-15534232.jpg）如下。可以有多个“图像”元素，即使这里只有一个。下面的代码只提取了URL128的值，但是我还需要得到相应的ImageUID，任何想法？

String unescaped="<imagesXML><Images><Image><ImageUID Scope='Public' Type='Guid' Value='{7f2535d0-9a41-4997-9694-0a4de569e6d9}'/><CorbisID Scope='Public' Type='String' Value='42-15534232'/><Title Scope='Public' Type='String' Value='Animal'/><CreditLine Scope='Public' Type='String' Value='¬© Robert Llewellyn/Corbis'/><IsRoyaltyFree Scope='Public' Type='Boolean' Value='False'/><AspectRatio Scope='Public' Type='String' Value='1.500000'/><URL128 Scope='Public' Type='String' Value='http://cachens.corbis.com/CorbisImage/thumb/15/53/42/15534232/42-15534232.jpg'/></Image></Images></imagesXML>";

InputSource source = new InputSource(new StringReader(unescaped));
        XPath xPath = XPathFactory.newInstance().newXPath();
        NodeList list = null;
        try
        {
            SimpleNamespaceContext nsCtx = new SimpleNamespaceContext();
            nsCtx.bindNamespaceUri("ns", "http://c1.net.corbis.com/");
            xPath.setNamespaceContext(nsCtx);
            list = (NodeList) xPath.evaluate("//ns:URL128/@Value", source, XPathConstants.NODESET);
        } catch (Exception ex)
        {
            log.error(ex.getMessage());
        }
        List<String> imageURLs = new ArrayList<String>();
        for (int i = 0; i < list.getLength(); i++)
        {
            imageURLs.add(list.item(i).getTextContent());
        }

Answer 1

检查此XPath 1.0：

 "/imagesXML/Images/Image/*[self::ImageUID or self::URRL128]/@Value"

如您的输入所示，我认为您实际上并不需要名称空间。否则，您只需添加它们或按local-name()选择。

使用XPath提取多个节点

1 个答案: