这个例子可以帮助JAVA爱好者理解JAVA对文件的操作，打开、删除、写入等操作。对初学者很有帮助。-This example can help understand the JAVA enthusiasts JAVA file operations, open, delete, write and other operations. Very helpful for beginners.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000981s ]
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:0.079193s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001068s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001196s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001056s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003165s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000938s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003850s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015383s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001180s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 52910 [ RunTime:0.017995s ]
