写JMS应用有没有什么简单的例子啊？

import javax.naming.*;

import javax.jms.*;

QueueConnectionFactory queueConnectionFactory;

Context messaging = new InitialContext();//第一步

queueConnectionFactory = (QueueConnectionFactory)//获取连接工厂


messaging.lookup(""QueueConnectionFactory"");

Queue queue;

queue = (Queue)messaging.lookup(""theQueue"");//获取queue

Topic topic;

topic =(Topic)messaging.lookup(""theTopic"");//获取topic

JMSContext context = connectionFactory.createContext();//创建个上下文

try (JMSContext context = 

connectionFactory.createContext();)

{

JMSProducer producer = context.createProducer();

context.createProducer().send(dest, message);//创建消费者或生产者，发送消息

TextMessage message = context.createTextMessage();

message.setText(msg_text);

// msg_text is a String

context.createProducer().send(message);

Message m = consumer.receive();

if (m instanceof TextMessage) {

String message = m.getBody(String.class);

System.out.println(""Reading message: "" + message);

} else {

// Handle error or process another message type

}//创建消息