Xml Xpath 值中的多个 NameSpace [英] Multiple NameSpace in Xml Xpath value
问题描述
我是在 Java 中为 Xmls 使用 Xpath 解析的新手.但是我学会了它并且它工作得很好，直到下面的问题我不确定如何遍历这个 .请找到下面的代码，让我知道需要更正的地方.
Am new in using Xpath parsing in Java for Xmls. But I learnt it and it worked pretty well until this below issue am not sure how to go traverse to next node in this . Please find the below code and Let me know what needs to be corrected .
package test;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.TransformerException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
public class CallTestcall {
public static void main(String[] args) throws Exception {
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
String responsePath1 = "C:/Verizon/webserviceTestTool/generatedResponse/example.xml";
Document doc1 = builder.parse(responsePath1);
String responsePath0 = "C:/Verizon/webserviceTestTool/generatedResponse/response.xml";
Document doc0 = builder.parse(responsePath0);
example0(doc0);
example1(doc1);
}
private static void example0(Document example)
throws XPathExpressionException, TransformerException {
System.out.println("\n*** First example - namespacelookup hardcoded ***");
XPath xPath = XPathFactory.newInstance().newXPath();
xPath.setNamespaceContext(new HardcodedNamespaceResolver());
String result = xPath.evaluate("s:Envelope/s:Body/ns1:UpdateSessionResponse",
example);
// I tried all the Values to traverse further to UpdateSessionResult but am not able to I used the following xpath expressions
result = xPath.evaluate("s:Envelope/s:Body/ns1:UpdateSessionResponse/a:UpdateSessionResult",
example);
result = xPath.evaluate("s:Envelope/s:Body/ns1:UpdateSessionResponse/i:UpdateSessionResult",
example);
System.out.println("example0 : "+result);
}
private static void example1(Document example)
throws XPathExpressionException, TransformerException {
System.out.println("\n*** First example - namespacelookup hardcoded ***");
XPath xPath = XPathFactory.newInstance().newXPath();
xPath.setNamespaceContext(new HardcodedNamespaceResolver());
String result = xPath.evaluate("books:booklist/technical:book/:author",
example);
System.out.println("example1 : "+result);
}
}
请在我添加前缀的地方找到实现 nameSpaceContext 的类
Please find the class that implements nameSpaceContext where I have added the prefixes
package test;
import java.util.Iterator;
import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
public class HardcodedNamespaceResolver implements NamespaceContext {
/**
* This method returns the uri for all prefixes needed. Wherever possible it
* uses XMLConstants.
*
* @param prefix
* @return uri
*/
public String getNamespaceURI(String prefix) {
if (prefix == null) {
throw new IllegalArgumentException("No prefix provided!");
} else if (prefix.equals(XMLConstants.DEFAULT_NS_PREFIX)) {
return "http://univNaSpResolver/book";
} else if (prefix.equals("books")) {
return "http://univNaSpResolver/booklist";
} else if (prefix.equals("fiction")) {
return "http://univNaSpResolver/fictionbook";
} else if (prefix.equals("technical")) {
return "http://univNaSpResolver/sciencebook";
} else if (prefix.equals("s")) {
return "http://schemas.xmlsoap.org/soap/envelope/";
} else if (prefix.equals("a")) {
return "http://channelsales.corp.cox.com/vzw/v1/data/";
} else if (prefix.equals("i")) {
return "http://www.w3.org/2001/XMLSchema-instance";
} else if (prefix.equals("ns1")) {
return "http://channelsales.corp.cox.com/vzw/v1/";
}
else {
return XMLConstants.NULL_NS_URI;
}
}
public String getPrefix(String namespaceURI) {
// Not needed in this context.
return null;
}
public Iterator getPrefixes(String namespaceURI) {
// Not needed in this context.
return null;
}
}
请找到我的 Xml ::::
Please find my Xml ::::
String XmlString = "<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body><UpdateSessionResponse xmlns="http://channelsales.corp.cox.com/vzw/v1/"><UpdateSessionResult xmlns:a="http://channelsales.corp.cox.com/vzw/v1/data/" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<a:ResponseHeader>
<a:SuccessFlag>true</a:SuccessFlag>
<a:ErrorCode i:nil="true"/>
<a:ErrorMessage i:nil="true"/>
<a:Timestamp>2012-12-05T15:28:35.5363903-05:00</a:Timestamp>
</a:ResponseHeader>
<a:SessionId>cd3ce09e-eb33-48e8-b628-ecd406698aee</a:SessionId>
<a:CacheKey i:nil="true"/>
推荐答案
请尝试以下操作.它对我有用.
Try the following. It works for me.
result = xPath.evaluate("/s:Envelope/s:Body/ns1:UpdateSessionResponse/ns1:UpdateSessionResult",
example);
由于您是从文档的根目录开始搜索，因此在 xpath 表达式之前使用正斜杠 (/)
Since you are searching from the root of the document, precede the xpath expression with a forward slash (/)
此外，在下面的 XML 片段中，字符串 xmlns="http... 表示您将其设置为默认名称空间.在您的名称空间解析器中，您为其提供前缀 ns1.因此，即使 UpdateSessionResult 定义了两个命名空间前缀 a 和 i，它本身并不使用这些前缀(例如 <a:UpdateSessionResult...) 因此它属于默认命名空间(名为ns1")
Also, in the XML fragment below, the string xmlns="http... means you are setting that to be the default namespace. In your namespace resolver you are giving this the prefix ns1. So even though UpdateSessionResult is defining two namespace prefixes a and i, it does not use those prefixes itself (for example <a:UpdateSessionResult...) therefore it belongs to the default namespace (named 'ns1')
<UpdateSessionResponse xmlns="http://channelsales.corp.cox.com/vzw/v1/">
<UpdateSessionResult xmlns:a="http://channelsales.corp.cox.com/vzw/v1/data/" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
这就是为什么您需要使用 ns1:UpdateSessionResult 而不是 a:UpdateSessionResult 或 i:UpdateSessionResult
That's why you need to use ns1:UpdateSessionResult instead of either a:UpdateSessionResult or i:UpdateSessionResult
这篇关于Xml Xpath 值中的多个 NameSpace的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
