JSP全名为Java Server Pages，其根本是一个简化的Servlet设计，他实现了Html语法中的java扩张（以 <%, %>形式）。JSP与Servlet一样，是在服务器端执行的。通常返回给客户端的就是一个HTML文本，因此客户端只要有浏览器就能浏览。Web服务器在遇到访问JSP网页的请求时，首先执行其中的程序段，然后将执行结果连同JSP文件中的HTML代码一起返回给客户端。插入的Java程序段可以操作数据库、重新定向网页等，以实现建立动态网页所需要的功能。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001261s ]
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:0.079775s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001358s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001179s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001282s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003214s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000936s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003669s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.019540s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001677s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 81086 [ RunTime:0.015829s ]
