ConnectionFactory: An object used to create a JMS connection.
ConnectionFactory：该对象用于创建JMS连接。
It must then use this instance to retrieve an instance of a ConnectionFactory. For example.
接着，它必须使用该实例来检索ConnectionFactory实例。
Connection and ConnectionFactory are the two main class definitions in the resource package.
Connection和ConnectionFactory是资源包中两个主要的类定义。
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