how to add a node in a xml payload in mule

问题

I want to add a node in my xml payload in mule. Can someone show me how to do it. Input xml --

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

I want to append a node after

The result xml shud be like this —

<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>

also

<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>

nothing is working..Please help !!!

回答1:

You can use XSLT to add the node or modify your XML in following way :-

  <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>

And your XSLT will be as follows and need to be put under src/main/resource folder :-

<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>

As you can see you need to first extract the value of cde from your input XML using XPATH3 and storing it into a variable. You can also store your id value into a variable ..

Finally you can modify the XML using the XSLT as given, and passing all the variables values into it as shown above.

UPDATED ANSWER

<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>

回答2:

For your expression component solution try using a xml-to-dom-transformer and after the component the opposite transaformer.

Another clean solution would be a identity transformation (adding id) using XSLT.

Finally if you are using Mule EE <3.7 this is a very easy task for DataMapper, or even better for DaveWeave if on 3.7.

回答3:

I Was able to do it by using 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>

来源：https://stackoverflow.com/questions/31460514/how-to-add-a-node-in-a-xml-payload-in-mule

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xml

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payload