无法使用XPath

获得XML的节点值

我的XML看起来象下面这样：无法使用XPath

<?xml version="1.0" encoding="UTF-8"?> 
<soapenv:Envelope`enter code here` 
    xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 
    <soapenv:Header> 
     <platformMsgs:documentInfo 
      xmlns:platformMsgs="urn:messages_2015_1.platform.webservices.netsuite.com"> 
      <platformMsgs:nsId>WEBSERVICES_3479023</platformMsgs:nsId> 
     </platformMsgs:documentInfo> 
    </soapenv:Header> 
    <soapenv:Body> 
     <addListResponse 
      xmlns=""> 
      <platformMsgs:writeResponseList 
       xmlns:platformMsgs="urn:messages_2015_1.platform.webservices.netsuite.com"> 
       <platformCore:status isSuccess="true" 
        xmlns:platformCore="urn:core_2015_1.platform.webservices.netsuite.com"/> 
        <platformMsgs:writeResponse> 
         <platformCore:status isSuccess="false" 
          xmlns:platformCore="urn:core_2015_1.platform.webservices.netsuite.com"> 
          <platformCore:statusDetail type="ERROR"> 
           <platformCore:code>DUP_ENTITY</platformCore:code> 
           <platformCore:message>This entity already exists.</platformCore:message> 
          </platformCore:statusDetail> 
         </platformCore:status> 
        </platformMsgs:writeResponse> 
       </platformMsgs:writeResponseList> 
      </addListResponse> 
     </soapenv:Body> 
    </soapenv:Envelope>

为了得到使用XPath值，我写了下面的类：

package com.scholastic.intl.esb.integration.resource; 

import java.util.HashMap; 
import java.util.Iterator; 
import java.util.Map; 

import javax.xml.namespace.NamespaceContext; 

public class SimpleNamespaceContext implements NamespaceContext { 

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

    public SimpleNamespaceContext(final Map<String, String> prefMap) { 
     PREF_MAP.putAll(prefMap);  
    } 

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

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

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

}

而下面的代码是应该读取platformCore的值：消息：

String xPathStr = "/soapenv:Envelope/soapenv:Body/addListResponse/platformMsgs:writeResponseList/platformCore:status/platformMsgs:writeResponse/platformCore:status/platformCore:statusDetail/platformCore:message"; 

XPath xPath = XPathFactory.newInstance().newXPath(); 
      Map<String, String> prefMap = new HashMap<String, String>() {{ 
       put("soapenv", "http://schemas.xmlsoap.org/soap/envelope/"); 
       put("xsd", "http://www.w3.org/2001/XMLSchema"); 
       put("xsi", "http://www.w3.org/2001/XMLSchema-instance"); 
       put("platformMsgs", "urn:messages_2015_1.platform.webservices.netsuite.com"); 
       put("platformCore", "urn:core_2015_1.platform.webservices.netsuite.com"); 
      }}; 
      xPath.setNamespaceContext(new SimpleNamespaceContext(prefMap)); 
      System.out.println("Expression value: "+xPath.evaluate(xPathStr, new InputSource(new StringReader(netSuiteResponse))));

其中，netSuiteResponse是SOAP格式的输入SOAP消息，但Sysout语句中没有打印任何值。

请建议我在这里出了什么问题，以及如何正确地做到这一点。

Regards， Anirban。

来源

2017-04-05 Anirban

你不能处理像这样的空namspaces，你可以匹配名称。

String xPathStr = "/soapenv:Envelope/soapenv:Body/*[name()='addListResponse']" 
      + "/platformMsgs:writeResponseList" 
      + "/platformCore:status/@isSuccess" 
      // + "/platformMsgs:writeResponse/platformCore:status/platformCore:statusDetail/platformCore:message"; 
      ; 
    String xPathStr2 = "/soapenv:Envelope/soapenv:Body/*[name()='addListResponse']" 
      + "/platformMsgs:writeResponseList" 
      + "/platformMsgs:writeResponse" 
      + "/platformCore:status" 
      + "/platformCore:statusDetail" 
      + "/platformCore:message"; 
      ; 
    XPath xPath = XPathFactory.newInstance().newXPath(); 
    Map<String, String> prefMap = new HashMap<String, String>() { 
     { 
      put("soapenv", "http://schemas.xmlsoap.org/soap/envelope/"); 
      put("xsd", "http://www.w3.org/2001/XMLSchema"); 
      put("xsi", "http://www.w3.org/2001/XMLSchema-instance"); 
      put("platformMsgs", "urn:messages_2015_1.platform.webservices.netsuite.com"); 
      put("platformCore", "urn:core_2015_1.platform.webservices.netsuite.com"); 
     } 
    }; 
    xPath.setNamespaceContext(new SimpleNamespaceContext(prefMap)); 
    System.out.println(
      "Expression value: " + xPath.evaluate(xPathStr, new InputSource(new StringReader(example)))); 
    System.out.println(
      "Expression value: " + xPath.evaluate(xPathStr2, new InputSource(new StringReader(example))));

会导致：

Expression value: true 
Expression value: This entity already exists.

来源

2017-04-05 13:30:49 minus

无法使用XPath

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