红帽全球峰会178.7.3. 控制所选的映射策略
您可以使用端点 URL 上的 jmsMessageType 选项，以强制所有消息的具体消息类型。
在以下路由中，我们轮询一个文件夹中的文件，并将它们作为 javax.jms.TextMessage 发送到 javax.jms.TextMessage，因为我们强制 JMS producer 端点使用文本消息：
from("file://inbox/order").to("jms:queue:order?jmsMessageType=Text");
from("file://inbox/order").to("jms:queue:order?jmsMessageType=Text");
您还可以通过使用键 CamelJmsMessageType 设置标头来指定要用于每条消息的消息类型。例如：
from("file://inbox/order").setHeader("CamelJmsMessageType", JmsMessageType.Text).to("jms:queue:order");
from("file://inbox/order").setHeader("CamelJmsMessageType", JmsMessageType.Text).to("jms:queue:order");
在 enum 类中，可能的值在 org.apache.camel.jms.JmsMessageType 中定义。
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