软件重用被广泛地认为是提高软件生产率和质量的关键。面向对象方法中的对象类是一种很好的可重用构件形式。为了快速获取和积累可重用构件，本文研究从源程序中获取对象类的问题，提出了一套较完整的从命令式语言程序中获取对象类的方法和规则。该方法能够从被分析的软件中提取尽可能多的可重用性较好的大粒度和小粒度的对象类。-Software reuse is widely considered to improve software productivity and quality of the key. Object-oriented approach in the object class is a good form of reusable components. For quick access to and accumulation of reusable components, this paper from the source object class to get the problem, proposed a more comprehensive language program from a command-style methods to get object classes and rules. This method can be analyzed to extract the software reusability as much as possible a good big size and small size of the object class.