java应用双链表实现的通信录 ，具有 "1.增加用户至通讯录，删除用户，查找用户，修改用户信息，保存到通讯录的基本功能 -java double the communication chain recorded, with "1. To increase user directory, delete users, Search users, change user information, contacts to keep the basic functions
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001148s ]
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:0.081368s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000957s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001591s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000931s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003088s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000773s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003551s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.013990s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001170s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 45467 [ RunTime:0.016675s ]
