处理Java编程中出现的异常，对程序中异常的抛出、捕捉和处理等应用进行编程，显示输出结果，附有实验心得-Handle Java programming exceptions occur, the program throws the exception, capture and processing applications such as programming, display output, with experimental experience
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002274s ]
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:0.126874s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001080s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001258s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001066s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003297s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000807s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003931s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017261s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001145s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 53248 [ RunTime:0.027425s ]
