多线程画树,在多线程的同步与异步中，线程互相不干扰出错，画出的树-Multi-threaded draw trees, many at the synchronous and asynchronous threads, the threads do not interfere with each other is wrong and draw the tree
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001464s ]
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:0.091963s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000911s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001119s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001011s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003091s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000853s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003555s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016130s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001190s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 140620 [ RunTime:0.012119s ]
