凯撒加密，用java实现 非扩展算法，C=M*K，有加密和解密两步-Caesar encryption, using java to achieve non-expansion algorithm, C = M* K, have a two-step encryption and decryption
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002889s ]
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:0.168008s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.016628s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001055s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003110s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001134s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001697s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 52870 [ RunTime:0.015963s ]
