An abstract handler is used from which concrete handlers extend. The elements of this pattern are.
具体的处理者是从抽象的处理者扩展而来。
A concrete handler implements an action to take the request object and to maintain a reference to the next handler in the chain.
具体的处理者实现了一个获得请求对象的操作，并为链中的下一个处理者维持一个参考标准。
In this pattern, the client is the individual raising an ethical concern and the concrete handler is the management chain from the lowest tier to the top of the organization.
在这一模式下，客户是提高道德关注的个体，具体的处理者是从组织的最低层到高层的管理链。
What must be retained by the business component handler is the identifier of a concrete business component identifier.
业务组件处理程序必须保留一个具体业务组件标识符的标识符。
Thus, a business component handler knows which concrete business component instance must be processed.
因此，一个业务组件处理程序知道具体哪个业务组件实例必须被处理。
ConcreteHandler: Concrete instances of the handler.
ConcreteHandler：具体的处理者实例。
ConcreteHandler: Concrete instances of the handler.
ConcreteHandler：具体的处理者实例。
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