版本控制是程序开发、管理必不可少的工具，特别是在多人协作的团队中，适宜的版本控制工具可以提高开发效率，消除很多有代码版本带来的问题。本文首先列举没有版本控制工具时可能遇到的问题，再对主流版本控制工具做概要介绍，之后对作为Java开发者首选的版本控制工具CVS的历史、功能、概念做详细的介绍；最后在Eclipse＋CVS环境中，以CVS使用的一个完整流程为例，介绍如何正确的使用CVS工具。

-Version control is program development, management indispensable tool, especially in multi-team collaboration, the appropriate version control tools can improve development efficiency, eliminating many of the problems caused by code-version. This paper cited no problems with version control tools that may be encountered, and then the mainstream version control tools to do an overview, and then to a Java developer preferred version control tools CVS history, functions, concepts do detail　last in Eclipse+ CVS environment, with a complete process used CVS for example, describes how to properly use CVS tools.