Detailed explanation of Java Ee JMS API in the Java class library

Java Ee's JMS (Java Message Service) API is a standard for transmission of asynchronous message transmission in distributed systems.It is an important part of the development of enterprise -level Java applications.This article will introduce the use of the JMS API in the Java library in detail. JMS is a specification that defines a series of interfaces and classes to pass messages between applications.It provides a reliable and asynchronous way to perform communication between distributed systems.In Java Ee, the JMS API provides standard interfaces and classes for the development of JMS applications. First, we need to introduce the JMS API in the Java EE project.It can be achieved by adding the following dependencies to Maven or Gradle: <dependency> <groupId>javax.jms</groupId> <artifactId>jms-api</artifactId> <version>1.1-rev-1</version> </dependency> Once we introduce the JMS API, we can use it to create a message sender and receiver.The following is an example code: import javax.jms.*; public class JmsExample { public static void main(String[] args) { try { // Connect to JMS provider ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); Connection connection = connectionFactory.createConnection(); connection.start(); // Create the meeting Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // Create goals Destination destination = session.createQueue("myQueue"); // Create the sender MessageProducer producer = session.createProducer(destination); // Create messages TextMessage message = session.createTextMessage("Hello, JMS!"); // Send a message producer.send(message); System.out.println ("The message has been sent:" + message.gettext ()); // Create a receiver MessageConsumer consumer = session.createConsumer(destination); // Receive messages Message receivedMessage = consumer.receive(); if (receivedMessage instanceof TextMessage) { TextMessage textMessage = (TextMessage) receivedMessage; System.out.println ("Receive message:" + TextMessage.gettext ()); } // Turn off the connection session.close(); connection.close(); } catch (JMSException e) { e.printStackTrace(); } } } In this example, we use Apache ActiveMQ as a JMS provider and create a queue (target).We first create a sender and send a message.Then create a receiver to receive the message.Finally, we turn off the session and connection. JMS API provides many other functions, such as message selectors, long -lasting subscriptions and transaction support.These features make JMS a powerful message transmission system. To sum up, the JMS API provides a convenient and reliable way to transfer asynchronous messages between distributed systems.This article introduces the use of the JMS API in the Java library and provides a simple example code.I hope this article will help you understand the concept and use of JMS.