Configuring a Step
正如在 the domain chapter中所讨论的，`Step`是一个域对象，它封装了一个批处理作业的独立顺序阶段，并且包含定义和控制实际批处理所需的所有信息。这是一个必须模糊的描述，因为任何给定 `Step`的内容由编写 `Job`的开发人员自行决定。`Step`可以像开发人员期望的那样简单或复杂。一个简单的 `Step`可能会将数据从文件中加载到数据库中，几乎不需要编写代码（取决于所使用的实现）。一个更复杂的 `Step`可能具有在处理过程中应用的复杂业务规则，如下图所示：
As discussed in the domain chapter, a Step is a
domain object that encapsulates an independent, sequential phase of a batch job and
contains all of the information necessary to define and control the actual batch
processing. This is a necessarily vague description because the contents of any given
Step are at the discretion of the developer writing a Job. A Step can be as simple
or complex as the developer desires. A simple Step might load data from a file into the
database, requiring little or no code (depending upon the implementations used). A more
complex Step might have complicated business rules that are applied as part of the
processing, as the following image shows:
