我必须使用从Web Socket返回值。我尝试使用@SubscribeMapping Annotated方法来处理并使用此块来处理我的业务。示例代码是：

@MessageMapping({"/hello"})
    @SendTo("/topic/greetings")
    public Greeting greeting(HelloMessage message) throws Exception { 
        return new Greeting("Thread Id:"+Thread.currentThread().getId()+" Hello, " + HtmlUtils.htmlEscape(message.getName()) + "!");
    }

@SubscribeMapping("/topic/greetings")
public void test(Greeting greeting){
    System.out.println("SUBSCRIBE CALLED");
}

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