尝试创建类似Bean的

try to create a Bean like

public class SimpleBean{
private String from;
private String text; 
public String getFrom(){return from;}
public String getText(){return text:}
//other methods like setters here... 
}

然后以这种方式设置messageConverter

then set the messageConverter in this way

            MappingJackson2MessageConverter m = new MappingJackson2MessageConverter();
            stompClient.setMessageConverter(m);

在"afterConnected(StompSession会话，StompHeaders connectedHeaders)"方法中，我的客户端没有调用"subscribe"方法

I have not seen any invocation of the "subscribe" method for your client in the method "afterConnected(StompSession session, StompHeaders connectedHeaders)"

    session.subscribe(subscribeMethod, new StompFrameHandler() {
//.. overriding for public Type getPayloadType(StompHeaders headers) {} and
// public void handleFrame(StompHeaders headers, Object payload) {} here
});

使用前面定义的SimpleBean实例，而不是调用"send"方法:

Than call for the "send" method, using an instance for the SimpleBean defined just before:

SimpleBean sb=new SimpleBean();
sb.setFrom("cliente1");
sb.setText("KIKO");
session.send("/app/chatchannel", sb);

这应该有帮助.