可以对pdf,doc,txt,html实现全文检索。用了中科院的ictloc分词器，分词效率较高-Can be pdf, doc, txt, html to achieve full-text search. With the Chinese Academy of Sciences of ictloc Word Breaker, efficient word

用Java实现了数据库索引中的b+ tree数据结构，可实现查询，删除，增加等功能.想学习数据库索引的同学不要错过。-By Java implementation of a index of b+ tree data structure, which can realize query, delete, add, and other functions. Students wishing to study index don t miss it