使用Mule4将CSV文件写入(附加)到变量

<mule xmlns:file="http://www.mulesoft.org/schema/mule/file" xmlns:dw="http://www.mulesoft.org/schema/mule/ee/dw" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.mulesoft.org/schema/mule/file http://www.mulesoft.org/schema/mule/file/current/mule-file.xsd
                        http://www.mulesoft.org/schema/mule/ee/dw http://www.mulesoft.org/schema/mule/ee/dw/current/dw.xsd
                        http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd">
    <file:connector name="File" autoDelete="true" streaming="true" validateConnections="true" doc:name="File"/>
    <flow name="csv-to-variableFlow">
        <file:read doc:name="Read CSV" path="input.csv" config-ref="File"/>
        <dw:transform-message doc:name="Transform CSV to Variable">
            <dw:set-payload><![CDATA[%dw 2.0
                output application/java
                ---
                payload]]></dw:set-payload>
        </dw:transform-message>
        <set-variable variableName="csvData" value="#[payload]" doc:name="Store CSV Data"/>
    </flow>
</mule>