看到你写的消费者是demo时，就尝试了，有问题，User类型不能直接转化，会报异常ClassException #2
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看到你写的消费者是demo时，就尝试了，有问题，User类型不能直接转化，会报异常ClassException
我在消费者接收的方法里，转化的的事getDomain();同时也把MessageEvent对象也给实现出来了，方便有一些特别的需求