Question

这是xml

<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Body>
<ns:processRequestResponse xmlns:ns="http://service.soap.oneflexi.com"><ns:return>
<?xml version="1.0" encoding="UTF-8"?> 
<ItemRs language="SG" currency="SGD"> 
  <Items>
 <Item>
   <CategoryCode />
    <CategoryDescription />
   <ItemCode>356</ItemCode>
    <ItemDescription>20% offer, Latest model</ItemDescription>
   <Quantity />
    <UnitPrice>24560</UnitPrice>
    <ItemBigImagesURL>http://goo.gl/klCGG4</ItemBigImagesURL>
    <ItemContent>Front Loading Washing Machine 6.5Kg Capacity 6 Motion Direct Drive</ItemContent>
   <ErrorCode />
    <ErrorMessage />
    <Beaconid>2499</Beaconid>
  </Item>
  </Items>
 <MID />
 </ItemRs>
</ns:return>
</ns:processRequestResponse>
</soapenv:Body>
</soapenv:Envelope>

我想验证路径 ItemRs 标记

 <ItemRs language="SG" currency="SGD">

我的java代码是

Node result = (Node)xPath.evaluate(" Soapenv:Envelope/Soapenv:Body/ns:processRequestResponse/ns:return/ItemRs[language=\"SG\"]", doc, XPathConstants.NODE);

但是上面的代码不起作用，因为我认为到达节点的路径是错误的。请提供任何帮助，并提前致谢。

更新

跑完后我得到这个错误

Namespace with prefix 'ns' has not been declared.

是什么意思

Answer 1

您需要定义从名称空间前缀到URL的映射，并将这些映射添加到上下文中。您可以通过实现NamespaceContext接口来完成此操作。

public class MyNamespaceContext implements NamespaceContext {

    private final Map<String, String> PREFIX_MAP = new HashMap<String, String>();

    public SimpleNamespaceContext(final Map<String, String> prefixMap) {
        PREFIX_MAP.putAll(prefixMap);       
    }

    public String getNamespaceURI(String prefix) {
        return PREFIX_MAP.get(prefix);
    }

    public String getPrefix(String uri) {
        throw new UnsupportedOperationException();
    }

    public Iterator getPrefixes(String uri) {
        throw new UnsupportedOperationException();
    }

}

这是如何使用这个类。

HashMap<String, String> namespacesByPrefix = new HashMap<String, String>();
namespacesByPrefix.put("ns", "http://service.soap.oneflexi.com");
namespacesByPrefix.put("soapenv", "http://schemas.xmlsoap.org/soap/envelope/");
MyNamespaceContext namespaces = new MyNamespaceContext(namespacesByPrefix);
xPath.setNamespaceContext(namespaces);
//...
Node result = (Node)xPath.evaluate("Soapenv:Envelope/Soapenv:Body/ns:processRequestResponse/ns:return/ItemRs[language=\"SG\"]", doc, XPathConstants.NODE);

Answer 2

我得到了解决方案。我们应该使用xpath作为＆＃34; // ItemRs＆＃34;

Node result = (Node)xPath.evaluate("//ItemRs[language=\"SG\"]", doc, XPathConstants.NODE);

验证节点的有效XPATH是什么

2 个答案: