activemq 消息类型

//文本消息
TextMessage textMessage = session.createTextMessage("文本消息");
producer.send(textMessage);

//键值对消息
MapMessage mapMessage = session.createMapMessage();
mapMessage.setLong("age", new Long(32));
mapMessage.setDouble("sarray", new Double(5867.15));
mapMessage.setString("username", "键值对消息");
producer.send(mapMessage);

//流消息
StreamMessage streamMessage = session.createStreamMessage();
streamMessage.writeString("streamMessage流消息");
streamMessage.writeLong(55);
producer.send(streamMessage);

//字节消息
String s = "BytesMessage字节消息";
BytesMessage bytesMessage = session.createBytesMessage();
bytesMessage.writeBytes(s.getBytes());
producer.send(bytesMessage);

//对象消息
User user = new User("cjm", "对象消息"); //User对象必须实现Serializable接口
ObjectMessage objectMessage = session.createObjectMessage();
objectMessage.setObject(user);
producer.send(objectMessage);

if(m instanceof TextMessage){ //接收文本消息
                TextMessage message = (TextMessage)m;
                System.out.println(message.getText());
            }else if(m instanceof MapMessage){ //接收键值对消息
                MapMessage message = (MapMessage)m;
                System.out.println(message.getLong("age"));
                System.out.println(message.getDouble("sarray"));
                System.out.println(message.getString("username"));
            }else if(m instanceof StreamMessage){ //接收流消息
                StreamMessage message = (StreamMessage)m;
                System.out.println(message.readString());
                System.out.println(message.readLong());
            }else if(m instanceof BytesMessage){ //接收字节消息
                byte[] b = new byte[1024];
                int len = -1;
                BytesMessage message = (BytesMessage)m;
                while((len=message.readBytes(b))!=-1){
                    System.out.println(new String(b, 0, len));
                }
            }else if(m instanceof ObjectMessage){ //接收对象消息
                ObjectMessage message = (ObjectMessage)m;
                User user = (User)message.getObject();
                System.out.println(user.getUsername() + " _ " + user.getPassword());
            }else{
                System.out.println(m);
            }