Java消息服务（Java Message Service，JMS）应用进程接口是一个Java平台中关于面向消息中间件（MOM）的API，用于在两个应用进程之间，或分布式系统中发送消息，进行异步通信。Java消息服务是一个与具体平台无关的API，绝大多数MOM提供商都对JMS提供支持。

Java消息服务的规范包括两种消息模式，点对点和发布者／订阅者。许多提供商支持这一通用框架因此，进程员可以在他们的分布式软件中实现面向消息的操作，这些操作将具有不同面向消息中间件产品的可移植性。

Java消息服务支持同步和异步的消息处理，在某些场景下，异步消息是必要的；在其他场景下，异步消息比同步消息操作更加便利。

The Java Message Service (JMS) API is a Java Message Oriented Middleware (MOM) API for sending messages between two or more clients. JMS is a part of the Java Platform, Enterprise Edition, and is defined by a specification developed under the Java Community Process as JSR 914. It is a messaging standard that allows application components based on the Java Enterprise Edition (Java EE) to create, send, receive, and read messages. It allows the communication between different components of a distributed application to be loosely coupled, reliable, and asynchronous.