java - 如何删除soap header 和附加标签以检索所需的xml？

Question

这是我的字符串格式的 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>

我需要的输出应该是上面 xml 的子集，删除了 SOAP 头和其他标签。我怎样才能在java中实现这个输出？

<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>

请提供任何帮助，我们将不胜感激，并提前致谢。

我尝试使用此线程中给出的示例:[1]: Java How to extract a complete XML block 。

这是java代码

public static void main(String... args)
    throws Exception
    {
//      String xml = "<A><B><id>0</id></B><B><id>1</id></B></A>";
        String xml =    "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:ser=\"http://service.soap.oneflexi.com\"><soapenv:Header/><soapenv:Body><ser:processRequest><ser:in0><![CDATA[<BconRq language=\"SG\" currency=\"SGD\"><RqHeader><Date>20140614</Date><Time>162944</Time><TimeZone>GMT+06:00</TimeZone><MessageType>5320</MessageType><VersionNo>9005001</VersionNo><AppVersion>5.0.1</AppVersion><MerchantId>2003001</MerchantId><TerminalId>2004002</TerminalId><StanNo/><LastTxnRefNo/><OTP/></RqHeader><OfferMerchant/><OfferFlag>Y</OfferFlag><BconId>1234</BconId><Items><Item><ItemCode>VC01</ItemCode></Item></Items></BconRq>]]></ser:in0><ser:in4>?</ser:in4></ser:processRequest></soapenv:Body></soapenv:Envelope>";

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        Document doc = dbf.newDocumentBuilder().parse(new InputSource(new StringReader(xml)));

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

//      Node result = (Node)xPath.evaluate("A/B[id = '1']", doc, XPathConstants.NODE);
//  Soapenv:Envelope/Soapenv:Body/ns:processRequestResponse/ns:return/BconRs[language="SG"]
        System.out.println(nodeToString(result));
    }

    private static String nodeToString(Node node)
    throws TransformerException
    {
        StringWriter buf = new StringWriter();
        Transformer xform = TransformerFactory.newInstance().newTransformer();
        xform.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        xform.transform(new DOMSource(node), new StreamResult(buf));
        return(buf.toString());
    }

我可能认为 XPATH 遍历到节点 ItemRs 时可能出现错误。

Answer 1

正如您所怀疑的，XPath 看起来不正确。您可能想尝试这个简单的 XPath :

//ItemRs[@language='SG']

要在 XPath 中引用属性，您需要在属性名称的开头使用 @。我尽量避免在 XPath 中提及 namespace 前缀，因为通常我们需要以某种方式注册 namespace 前缀到 namespace URI 的映射(我不确定如何在 Java 中执行此操作，我更喜欢 .NET)。