基于Socket TCP的网络文件传输例子，比较精练，简单易懂，对网络编程入门者有参考作用。-based on Socket TCP network file transfer example, more concise and easily understood. Network Programming for beginners as a useful reference.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001422s ]
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:0.089309s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001253s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002014s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001299s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003716s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001166s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003217s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015362s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001475s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 320902 [ RunTime:0.001291s ]
