The Research And Implementation Of Indexer Technology In Professional Search Engine System

With the rapid development of Internet and WWW, the resource in Internet become rich more and more, therefore, the information search services based on Internet develop quickly. The general search engines such as Google, Yahoo are very excellent at their search function, but they are unfitable in a certain professional field. It is necessary to develop search engine system in specifically field in order that the specifically researcher can search information effectively.In this paper, first, we comprehended the design and use of full-text search system deeply, by the research and practice of Forward lists and Inverted lists, the technique of Character- based lists and Word-based lists in full-text search system. We analyse the source code of Lucene in Apache full-text search system, and master the system structure, the base data type, the index structure in memory, the structure of index file in Lucene system.