提供者创建的受管对象包含与 JDBC 包装器（由容器提供的连接池管理器添加）相似的自动征用代码。

The managed objects created by the provider contain similar auto-enlistment code as the JDBC wrapper added by the container-supplied connection pool manager.

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如果您打开生成的J2C bean，您将看到在代码中被贴以doclet标志的受管的连接工厂的JNDI名字。

If you open the generated J2C bean, you will see that the JNDI name of the managed connection factory is specified in the doclet tag within the code.

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例如，我们可以在security - constraint的内部加上如下代码片段，这样当用户访问受管资源时，将会被强制使用SSL。

For example we can add the following snippet inside the security-constraint to enforce use of SSL when user is accessing managed resources.

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