Wed, 10 Jun 2009 14:48:00 GMT仅谈纯粹的编程技术，或者是相关的那些文章。。。。。晚安，看不到房子车子的绝望的挨踢民工们。。。http://blog.csdn.net/liltos/http://blog.csdn.net/liltos/archive/2009/06/10/4257597.aspxhttp://blog.csdn.net/liltos/comments/4257597.aspx0http://blog.csdn.net/liltos/comments/commentRss/4257597.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=4257597<br />几个月前写的，很乱，从邮箱里放出来了。<br /><br /><br /><br />mysql 的 select <br />总见到有人说，写 select 语句时，尽量把取的列名写出来，而不要用 select * 。<br />其实简单的表，是无所谓的。但是如果涉及到表间连接或复杂查询的时候，这个东西就起效果了。<br />假设有以下四张表：<br /> t_a  id  b_id  col1  col2  created_by  created_att_b  id  c_id  col1  col2t_c  id  col1  col2  col3  col4<br />t_a 有 100,000 条记录t_b 有 10,000 条记录t_c 有 100 条记录<br />有一个查询是这样的：select * from t_a a, t_b b, t_c cwhere a.created_by <img src ="http://blog.csdn.net/liltos/aggbug/4257597.aspx" width = "1" height = "1" /><img src="http://www1.feedsky.com/t1/236629980/liltos/csdn.net/s.gif?r=http://blog.csdn.net/liltos/archive/2009/06/10/4257597.aspx" border="0" height="0" width="0" style="position:absolute" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629980/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629980/art01.gif" onerror="this.style.display='none'" /></a></p>Wed, 10 Jun 2009 22:48:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/06/10/4257597.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/06/10/4257597.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/06/10/4257597.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629980/1047239http://blog.csdn.net/liltos/archive/2009/06/10/4257521.aspxhttp://blog.csdn.net/liltos/comments/4257521.aspx0http://blog.csdn.net/liltos/comments/commentRss/4257521.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=4257521ruby logger, 模仿 log4j 的使用方式。<img src ="http://blog.csdn.net/liltos/aggbug/4257521.aspx" width = "1" height = "1" /><img src="http://www1.feedsky.com/t1/236629981/liltos/csdn.net/s.gif?r=http://blog.csdn.net/liltos/archive/2009/06/10/4257521.aspx" border="0" height="0" width="0" style="position:absolute" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629981/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629981/art01.gif" onerror="this.style.display='none'" /></a></p>Wed, 10 Jun 2009 22:34:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/06/10/4257521.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/06/10/4257521.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/06/10/4257521.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629981/1047239http://blog.csdn.net/liltos/archive/2009/03/24/4019722.aspxhttp://blog.csdn.net/liltos/comments/4019722.aspx0http://blog.csdn.net/liltos/comments/commentRss/4019722.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=4019722哥哥很 river crab 的哇，这纯粹是为了好玩～～<img src ="http://blog.csdn.net/liltos/aggbug/4019722.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629982/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629982/art01.gif" onerror="this.style.display='none'" /></a></p>Tue, 24 Mar 2009 20:04:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/03/24/4019722.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/03/24/4019722.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/03/24/4019722.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629982/1047239http://blog.csdn.net/liltos/archive/2009/03/22/4015633.aspxhttp://blog.csdn.net/liltos/comments/4015633.aspx0http://blog.csdn.net/liltos/comments/commentRss/4015633.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=4015633RSS阅读器简单介绍<img src ="http://blog.csdn.net/liltos/aggbug/4015633.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629983/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629983/art01.gif" onerror="this.style.display='none'" /></a></p>Mon, 23 Mar 2009 07:35:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/03/22/4015633.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/03/22/4015633.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/03/22/4015633.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629983/1047239http://blog.csdn.net/liltos/archive/2009/02/25/3935095.aspxhttp://blog.csdn.net/liltos/comments/3935095.aspx0http://blog.csdn.net/liltos/comments/commentRss/3935095.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3935095MySql 会对右侧的空格自行处理，但是，左边的空格就不会。<img src ="http://blog.csdn.net/liltos/aggbug/3935095.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629984/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629984/art01.gif" onerror="this.style.display='none'" /></a></p>Wed, 25 Feb 2009 19:24:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/02/25/3935095.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/02/25/3935095.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/02/25/3935095.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629984/1047239http://blog.csdn.net/liltos/archive/2009/02/04/3861845.aspxhttp://blog.csdn.net/liltos/comments/3861845.aspx0http://blog.csdn.net/liltos/comments/commentRss/3861845.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3861845tomcat 乱码，设置了 response 的 charseterEncoding 也不起效，在进入第一个 filter 的时候，response.isCommitted 就返回 true 了。<img src ="http://blog.csdn.net/liltos/aggbug/3861845.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629985/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629985/art01.gif" onerror="this.style.display='none'" /></a></p>Wed, 04 Feb 2009 20:09:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/02/04/3861845.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/02/04/3861845.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/02/04/3861845.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629985/1047239http://blog.csdn.net/liltos/archive/2009/01/07/3725674.aspxhttp://blog.csdn.net/liltos/comments/3725674.aspx0http://blog.csdn.net/liltos/comments/commentRss/3725674.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3725674在1.5.1RC1版本chm文档中的Element模块，有如下描述：<br /><br />addClassName<br /><br /><br /><br /><br />addClassName :: <br />Element<img src ="http://blog.csdn.net/liltos/aggbug/3725674.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629986/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629986/art01.gif" onerror="this.style.display='none'" /></a></p>Wed, 07 Jan 2009 19:09:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/01/07/3725674.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/01/07/3725674.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/01/07/3725674.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629986/1047239http://blog.csdn.net/liltos/archive/2009/01/04/3703227.aspxhttp://blog.csdn.net/liltos/comments/3703227.aspx0http://blog.csdn.net/liltos/comments/commentRss/3703227.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3703227test iframe in rss content没仔细看过文档，测试一下，看看rss里能否包含iframe，iframe的地址是localhost啊<img src ="http://blog.csdn.net/liltos/aggbug/3703227.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629987/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629987/art01.gif" onerror="this.style.display='none'" /></a></p>Sun, 04 Jan 2009 20:57:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/01/04/3703227.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/01/04/3703227.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/01/04/3703227.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629987/1047239http://blog.csdn.net/liltos/archive/2009/01/02/3687019.aspxhttp://blog.csdn.net/liltos/comments/3687019.aspx0http://blog.csdn.net/liltos/comments/commentRss/3687019.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3687019mysql再次出错。。。<br /><br />ActiveRecord::StatementInvalid (Mysql::Error: Can't create/write to file 'D:\Temp\Tmp\#sql_810_0.MYD' (Errcode: 13): SHOW FIELDS FROM `download_pages`):<br /><br />查了一下，D盘还有近4G的空间。。<br />把空间清到 5G，再跑，OK了。<br /><br />太奇怪了，我没有关联表操作，此表的记录数是260W，所有的字段都是int，float，datetime。但是把这转成文件的话，也不过200M以内。<br /><br />都是单表操作也能出问题，汗。。。<br /><img src ="http://blog.csdn.net/liltos/aggbug/3687019.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629988/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629988/art01.gif" onerror="this.style.display='none'" /></a></p>Sat, 03 Jan 2009 06:17:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2009/01/02/3687019.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2009/01/02/3687019.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2009/01/02/3687019.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629988/1047239http://blog.csdn.net/liltos/archive/2008/12/23/3590147.aspxhttp://blog.csdn.net/liltos/comments/3590147.aspx0http://blog.csdn.net/liltos/comments/commentRss/3590147.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3590147分析了存储在 properties 文件里和存储到 数据库 里的优缺点。 rss 只输出摘要，好短，效果好差，好恶心。<img src ="http://blog.csdn.net/liltos/aggbug/3590147.aspx" width = "1" height = "1" /><p class="fswww1"><a href="http://www1.feedsky.com/r/l/csdn.net/liltos/236629989/art01.html" target="_blank"><img border="0" ismap="ismap" src="http://www1.feedsky.com/r/i/csdn.net/liltos/236629989/art01.gif" onerror="this.style.display='none'" /></a></p>Wed, 24 Dec 2008 00:11:00 +0800洁白滴黑子http://blog.csdn.net/liltos/archive/2008/12/23/3590147.aspx#Feedbackhttp://blog.csdn.net/liltos/archive/2008/12/23/3590147.aspx洁白滴黑子http://blog.csdn.net/liltos/archive/2008/12/23/3590147.aspxhttp://blog.csdn.net/liltos/feed.aspxcsdn.net/liltos/~1047239/236629989/1047239