如何在JMS

Question

我正在学习JMS尝试下面一个简单的例子，但它给错误

package pointToPoint; 
import javax.naming.InitialContext; 
import javax.jms.Queue; 
import javax.jms.Session; 
import javax.jms.TextMessage; 
import javax.jms.QueueSession; 
import javax.jms.QueueReceiver; 
import javax.jms.QueueConnection; 
import javax.jms.QueueConnectionFactory; 

public class Receiver 
{ 
    public static void main(String[] args) throws Exception 
    { 
     // get the initial context 
     InitialContext ctx = new InitialContext(); 

     // lookup the queue object 
     Queue queue = (Queue) ctx.lookup("queue/queue0"); 

     // lookup the queue connection factory 
     QueueConnectionFactory connFactory = (QueueConnectionFactory) ctx. 
      lookup("queue/connectionFactory"); 

     // create a queue connection 
     QueueConnection queueConn = connFactory.createQueueConnection(); 

     // create a queue session 
     QueueSession queueSession = queueConn.createQueueSession(false, 
      Session.AUTO_ACKNOWLEDGE); 

     // create a queue receiver 
     QueueReceiver queueReceiver = queueSession.createReceiver(queue); 

     // start the connection 
     queueConn.start(); 

     // receive a message 
     TextMessage message = (TextMessage) queueReceiver.receive(); 

     // print the message 
     System.out.println("received: " + message.getText()); 

     // close the queue connection 
     queueConn.close(); 
    } 
} 

错误信息使用JNDI：

Exception in thread "main" javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial 
    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source) 
    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source) 
    at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source) 
    at javax.naming.InitialContext.lookup(Unknown Source) 
    at pointToPoint.Receiver.main(Receiver.java:22) 

谁能请帮助我。

Answer 1

答案在堆栈跟踪中。在独立应用程序中，您应该将环境（实现，URL等）传递给InitialContext。在像JBoss这样的J2EE容器内部，你的代码可以工作。

这应该有帮助： NoInitialContextException error