这个是信息检索系统原理的作业，能够对多篇文章的单词进行布尔检索，支持and or not三种逻辑运算，对多个单词的与或非运算结果的文章篇目号进行输出。比如A and B or not C含义是既出现A单词又出现B单词或者不出现C单词的文章有第2篇，第13篇，就对这两篇文章号2和13进行输出。用户使用时可将主函数中文件改成自己计算机上的文件路径，然后就可以运行了。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001291s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.091877s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001238s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002221s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001279s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003620s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001155s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003215s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015569s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001492s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 216668 [ RunTime:0.001853s ]
