探讨《中图法》分类体系XML存储的规则,基于《中图法》分类体系的XML存储,利用Java技术将其解析为DOM树,通过遍历DOM树获取类目的大小。解释树图及嵌套树图的含义,利用有序树图的构造算法将DOM树映射为树图,实现《中图法》类目大小的可视表示,这样可以很容易地获取《中图法》同级类目的大小。 This paper discusses the rules of XML classification of CLC classification system, XML storage based on CLC classification system, parses it into DOM tree using Java technology, and traverses the DOM tree to obtain the size of the class object. Explain the meanings of tree diagram and nested tree diagram, map the DOM tree into a tree diagram by using the construction algorithm of the ordered tree diagram, and realize the visual representation of the size of the “China Library Law” category, so that it is easy to obtain the “Chinese map Act ”at the same class size.