第一种情况不指定目的端矩形的宽度和高度，而是自动缩放影像。

In the first case, the width and height of the destination rectangle are not specified, and the image is automatically scaled.

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注意：客户端应用程序使用这个队列作为发送应答的目的地，可以通过JMS消息中的JMSReplyTo Header来指定。

Note: This queue is used by a client application as the destination to which replies are to be sent, specified via the JMSReplyTo header in JMS messages.

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在输出通道上送出之讯息的目的端会在通道建立时指定。

The destination for messages sent out on an output channel is specified at channel creation time.

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