本文件主要完成Kruskal算法。本文件包括三个类，分别是顶点类、边类和Kruskal类。-The document completed Kruskal algorithm. This document consists of three categories, namely category vertex, edge type and Kruskal category.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002140s ]
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:0.088022s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002486s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002220s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002462s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004428s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002126s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014828s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002715s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 126312 [ RunTime:0.001361s ]
