如何在 apache camel 中以 velocity 附加文件内容

Question

我正在尝试编写一个关于 Apache-camel velocity 的简单示例 :)。它应该获取一个文件并将其内容插入到预先编写的文本中（在 .vm 文件中）。但它只是把文件名放在那个地方。这是我的脚本。

blueprint.xml

    <camelContext id="_context1" xmlns="http://camel.apache.org/schema/blueprint">
    <route id="_route1">
        <from id="_from1" uri="file:work/velocityFileInput"/>
        <setHeader headerName="receiver" id="_setHeader1">
            <simple>sir</simple>
        </setHeader>
        <setHeader headerName="senderName" id="_setHeader1">
            <simple>Magfa co.</simple>
        </setHeader>
        <setHeader headerName="meetingAddress" id="_setHeader1">
            <simple> Tehran , Iran</simple>
        </setHeader>
        <setHeader headerName="senderPersonalName" id="_setHeader1">
            <simple>Ehsan Zangeneh</simple>
        </setHeader>          
        <to id="_to1" uri="velocity:email.vm"/>
        <log message="${body}"></log>
    </route>
</camelContext>

这是我的 .vm 文件内容

Hello dear ${headers.receiver},
This letter is sent from ${headers.senderName} to inform you that you are
invited to the meeting in the address of '${headers.meetingAddress}'.
The meeting is about
${in}
Best regards
${headers.senderPersonalName} 

我也尝试了 ${body} 而不是 ${in}，但没有用。

Answer 1

从文件的 URI 检索内容后，尝试将正文转换为字符串。

希望这个可行，你的路线是这样的

<route id="_route1">
 <from id="_from1" uri="file:work/velocityFileInput"/>
 <convertBodyTo id="_convertBodyFileContent" type="java.lang.String"/>
 <setHeader headerName="receiver" id="_setHeader1">
  <simple>sir</simple>
 </setHeader>
 <setHeader headerName="senderName" id="_setHeader1">
  <simple>Magfa co.</simple>
 </setHeader>
 <setHeader headerName="meetingAddress" id="_setHeader1">
   <simple> Tehran , Iran</simple>
 </setHeader>
 <setHeader headerName="senderPersonalName" id="_setHeader1">
  <simple>Ehsan Zangeneh</simple>
 </setHeader>          
 <to id="_to1" uri="velocity:email.vm"/>
 <log message="${body}"></log>
</route>

这是您的 .vm 文件内容

Hello dear ${headers.receiver},
This letter is sent from ${headers.senderName} to inform you that you are
invited to the meeting in the address of '${headers.meetingAddress}'.
The meeting is about
${body}
Best regards
${headers.senderPersonalName}