如何在mule的XML有效负载中添加节点

Question

我想在mule的xml有效负载中添加一个节点。有人能告诉我怎么做吗?输入xml——

<Location>
    <cde> Hello </cde>
</Location>

我想在

后面附加一个节点

结果xml应该是这样的-

<Location>  
<id> 1234 </id>     
<cde> Hello </cde> 
</Location>

I tried

<expression-component><![CDATA[
  myNode = message.payload.rootElement.addElement(’ID’);
  myNode.text = '1234';
  message.payload.rootElement.elements().add(1, myNode.detach());
]]></expression-component>

也

<enricher source="#[sessionVars.providerid]" doc:name="Message Enricher"
target="#[xpath3(’/Locations’,payload,’NODE’).appendChild(payload.importNode($.getFirstChild(),true) )]">
<http:request config-ref="HTTP_Request_Configuration" path="/system" method="POST" doc:name="HTTP"/>
</enricher>

什么都不工作，请帮忙!!

Answer 1

您可以使用XSLT以下列方式添加节点或修改XML:-

  <http:listener-config name="HTTP_Listener_Configuration" host="localhost" port="8082" basePath="rc" doc:name="HTTP Listener Configuration"/>
  <flow name="test">
    <http:listener config-ref="HTTP_Listener_Configuration" path="/myservice" doc:name="HTTP"/>
   <set-variable variableName="Cde" value="#[xpath3('//Location/cde')]" doc:name="Variable"/>
    <logger level="INFO" message="Cde :-#[flowVars.Cde]" doc:name="Logger"/>
    <set-variable variableName="Id" value="1324" doc:name="Variable"/>
    <mulexml:xslt-transformer name="PrepareSOAPRequest" xsl-file="Transform.xsl" outputEncoding="UTF-8"  encoding="UTF-8" maxIdleTransformers="2" maxActiveTransformers="5" returnClass="java.lang.String" doc:name="XSLT">
      <mulexml:context-property key="Cde" value="#[flowVars.Cde]"/> <!-- Passing the variables in XSLT to produce the XML dynamically -->
      <mulexml:context-property key="Id" value="#[flowVars.Id]"/> <!-- Passing the variables in XSLT to produce the XML dynamically -->
    </mulexml:xslt-transformer>      
    <logger level="INFO" message="Final XML :-#[message.payload]" doc:name="Logger"/>   
  </flow>  

您的XSLT将如下所示，需要放在src/main/resource文件夹下:-

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
  <xsl:output method="xml" indent="yes" omit-xml-declaration="yes" />
   <!-- Getting values from Mule variables -->
   <xsl:param name="Cde"/>
   <xsl:param name="Id"/>
<xsl:template match="/">
  <Location>    
 <id><xsl:value-of select="$Id"/></id>  
 <cde><xsl:value-of select="$Cde"/></cde> 
 </Location>
</xsl:template>
</xsl:stylesheet>  

如您所见，您需要首先使用XPATH3从输入XML中提取cde的值并将其存储到一个变量中。您还可以将id值存储到一个变量中。

最后，您可以使用XSLT修改XML，并像上面所示的那样将所有变量的值传递给它。

更新后的答案

<enricher source="#[message.payload]" target="#[flowVars.test]">
    <processor-chain>
    <set-payload value="&lt;Location&gt;&lt;cde&gt; Hello &lt;/cde&gt;&lt;/Location&gt;" doc:name="Set Payload" />
    <set-variable variableName="Cde" value="#[xpath3('//Location/cde')]" doc:name="Variable" />
    <logger level="INFO" message="Cde :-#[flowVars.Cde]" doc:name="Logger" />
    <set-variable variableName="Id" value="1324" doc:name="Variable" />
    <mulexml:xslt-transformer name="PrepareSOAPRequest" xsl-file="Transform.xsl" outputEncoding="UTF-8" encoding="UTF-8" maxIdleTransformers="2" maxActiveTransformers="5" returnClass="java.lang.String"
                    doc:name="XSLT">
      <mulexml:context-property key="Cde" value="#[flowVars.Cde]" /> <!-- Passing the variables in XSLT to produce the XML dynamically -->
      <mulexml:context-property key="Id" value="#[flowVars.Id]" /> <!-- Passing the variables in XSLT to produce the XML dynamically -->
    </mulexml:xslt-transformer>
    <logger level="INFO" message="Final XML :-#[message.payload]" doc:name="Logger" />
    <http:request config-ref="HTTP_Request_Configuration" path="/system" method="POST" doc:name="HTTP"/>
    </processor-chain>
 </enricher>

Answer 2

对于您的表达式组件解决方案，请尝试使用xml-to-dom-transformer，并在组件后使用相反的变压器。

另一个干净的解决方案是使用XSLT进行恒等转换(添加id)。

最后，如果你使用的是Mule EE <3.7，这对于DataMapper来说是一个非常简单的任务，如果在3.7上，对于DaveWeave来说甚至更好。

Answer 3

我可以使用groovy

<enricher target="#[flowVars['compliant']]" doc:name="Message Enricher">
            <flow-ref name="lookupComplaintData" doc:name="lookupComplaintData"/>
        </enricher>
 <set-payload value="#[flowVars.compliant]" doc:name="Set Payload"/>
<sub-flow doc:description="add Compliant information   "
         name="lookupComplaintData">
        <scripting:transformer doc:name="Groovy">
            <scripting:script engine="Groovy"><![CDATA[import org.dom4j.*
import groovy.xml.DOMBuilder
import groovy.xml.dom.DOMCategory
Element compliantElement = payload.getRootElement().addElement("compliant")
compliantElement.addElement("compliantType").addText("Delivery")
compliantElement.addElement("compliantReference").addText("ABC123ABC")
compliantElement.addElement("complaintText").addText("Order was delivered on time")
return payload
]]></scripting:script>
        </scripting:transformer>