After both logging methods are made available through the ServletContext interface, the key is to obtain a reference to an object of type ServletContext.

在有了ServletContext接口提供的两个可用的日志记录方法之后，剩下的关键是获取一个对servletcontext类型的对象的引用。

youdao

The capability of defining method invocations in the configuration file is very important and should not be restricted to methods that return an object reference.

在配置文件中定义方法调用的能力是很重要的，不应该将这种能力限制于返回对象引用的方法。

youdao

Exposing reference types through your public interface allows users of your object to modify its internals without going through the methods and properties you've defined.

通过公共接口暴露引用类型，允许你的对象的用户，不用通过你已经定义的方法和属性就能修改它的内部。

youdao