本代码适合初学者学习java网络编程。这几个代码都是教你如何建立个自己的服务器，在连接服务器的。-those java code are designed for new starter.who have no experience of java network programming.it will be easy to understand.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001377s ]
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:0.094081s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001349s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001952s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001347s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003597s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001134s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003229s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014523s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001458s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 51490 [ RunTime:0.001344s ]
