使用xpath在Java中解析带有名称空间的XML
我试图用java解析SOAP请求,但代码并没有返回任何节点 这是任何人都能找到错误的代码使用xpath在Java中解析带有名称空间的XML,java,xml,soap,xpath,Java,Xml,Soap,Xpath,我试图用java解析SOAP请求,但代码并没有返回任何节点 这是任何人都能找到错误的代码 String xml="<soapenv:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" x
String xml="<soapenv:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:ser=\"http://services.web.post.list.com\"><soapenv:Header><authInfo xsi:type=\"soap:authentication\" xmlns:soap=\"http://list.com/services/SoapRequestProcessor\"><!--You may enter the following 2 items in any order--><username xsi:type=\"xsd:string\">dfasf@google.com</username><password xsi:type=\"xsd:string\">PfasdfRem91</password></authInfo></soapenv:Header></soapenv:Envelope>";
System.out.println(xml);
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse(new InputSource(new StringReader(xml)));
XPath xpath = XPathFactory.newInstance().newXPath();
// XPath Query for showing all nodes value
try
{
XPathExpression expr = xpath.compile("/soapenv:Envelope/soapenv:Header/authInfo/password");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
System.out.println("Got " + nodes.getLength() + " nodes");
// System.out.println(nodes.item(0).getNodeValue());
}
catch(Exception E)
{
System.out.println(E);
}
stringxml=”dfasf@google.comPfasdfRem91";
System.out.println(xml);
DocumentBuilderFactory domFactory=DocumentBuilderFactory.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder=domFactory.newDocumentBuilder();
documentdoc=builder.parse(新的InputSource(新的StringReader(xml));
XPath=XPathFactory.newInstance().newXPath();
//用于显示所有节点值的XPath查询
尝试
{
XPathExpression expr=xpath.compile(“/soapenv:Envelope/soapenv:Header/authInfo/password”);
Object result=expr.evaluate(doc,XPathConstants.NODESET);
节点列表节点=(节点列表)结果;
System.out.println(“Got”+节点.getLength()+节点”);
//System.out.println(nodes.item(0.getNodeValue());
}
捕获(例外E)
{
系统输出打印ln(E);
}
您需要在
XPath
上设置NamespaceContext
:
演示
package forum11644994;
import java.io.StringReader;
import java.util.Iterator;
import javax.xml.namespace.NamespaceContext;
import javax.xml.parsers.*;
import javax.xml.xpath.*;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
public class Demo {
public static void main(String[] args) throws Exception {
String xml = "<soapenv:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:ser=\"http://services.web.post.list.com\"><soapenv:Header><authInfo xsi:type=\"soap:authentication\" xmlns:soap=\"http://list.com/services/SoapRequestProcessor\"><!--You may enter the following 2 items in any order--><username xsi:type=\"xsd:string\">dfasf@google.com</username><password xsi:type=\"xsd:string\">PfasdfRem91</password></authInfo></soapenv:Header></soapenv:Envelope>";
System.out.println(xml);
DocumentBuilderFactory domFactory = DocumentBuilderFactory
.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse(new InputSource(new StringReader(xml)));
XPath xpath = XPathFactory.newInstance().newXPath();
xpath.setNamespaceContext(new NamespaceContext() {
@Override
public Iterator getPrefixes(String arg0) {
return null;
}
@Override
public String getPrefix(String arg0) {
return null;
}
@Override
public String getNamespaceURI(String arg0) {
if("soapenv".equals(arg0)) {
return "http://schemas.xmlsoap.org/soap/envelope/";
}
return null;
}
});
// XPath Query for showing all nodes value
try {
XPathExpression expr = xpath
.compile("/soapenv:Envelope/soapenv:Header/authInfo/password");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
System.out.println("Got " + nodes.getLength() + " nodes");
// System.out.println(nodes.item(0).getNodeValue());
} catch (Exception E) {
System.out.println(E);
}
}
}
用于UM11644994的包;
导入java.io.StringReader;
导入java.util.Iterator;
导入javax.xml.namespace.NamespaceContext;
导入javax.xml.parsers.*;
导入javax.xml.xpath.*;
导入org.w3c.dom.Document;
导入org.w3c.dom.NodeList;
导入org.xml.sax.InputSource;
公开课演示{
公共静态void main(字符串[]args)引发异常{
字符串xml=”dfasf@google.comPfasdfRem91";
System.out.println(xml);
DocumentBuilderFactory domFactory=DocumentBuilderFactory
.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder=domFactory.newDocumentBuilder();
documentdoc=builder.parse(新的InputSource(新的StringReader(xml));
XPath=XPathFactory.newInstance().newXPath();
setNamespaceContext(新的NamespaceContext(){
@凌驾
公共迭代器getPrefixes(字符串arg0){
返回null;
}
@凌驾
公共字符串getPrefix(字符串arg0){
返回null;
}
@凌驾
公共字符串getNamespaceURI(字符串arg0){
if(“soapenv”.equals(arg0)){
返回“http://schemas.xmlsoap.org/soap/envelope/";
}
返回null;
}
});
//用于显示所有节点值的XPath查询
试一试{
XPathExpression expr=xpath
.compile(“/soapenv:Envelope/soapenv:Header/authInfo/password”);
Object result=expr.evaluate(doc,XPathConstants.NODESET);
节点列表节点=(节点列表)结果;
System.out.println(“Got”+节点.getLength()+节点”);
//System.out.println(nodes.item(0.getNodeValue());
}捕获(例外E){
系统输出打印ln(E);
}
}
}
输出
<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://services.web.post.list.com"><soapenv:Header><authInfo xsi:type="soap:authentication" xmlns:soap="http://list.com/services/SoapRequestProcessor"><!--You may enter the following 2 items in any order--><username xsi:type="xsd:string">dfasf@google.com</username><password xsi:type="xsd:string">PfasdfRem91</password></authInfo></soapenv:Header></soapenv:Envelope>
Got 1 nodes
dfasf@google.comPfasdfRem91
有1个节点
在最新回复中添加更多内容。。
要获得特定的节点值,可以使用下面的--
[System.out.println(nodes.item(0.getTextContent());
]尝试以下方法: