�??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#31934;&#21697;&#22269;&#20135;&#20081;&#30721;&#20037;&#20037;&#20037;&#20037;&#20037;&#24433;&#29255;&#44;&#26085;&#38889;&#20013;&#25991;&#23383;&#24149;&#19968;&#21306;&#20108;&#21306;&#44;&#20122;&#27954;&#20320;&#25026;&#30340;&#22312;&#32447;&#35270;&#39057;</title><link>http://www.aygfsteel.com/atealxt/</link><description>面向对象�Q�开源，框架�Q�敏��P��云计���，NoSQL�Q�商业智能，�~�程思想�?/description><language>zh-cn</language><lastBuildDate>Sun, 04 May 2025 09:26:33 GMT</lastBuildDate><pubDate>Sun, 04 May 2025 09:26:33 GMT</pubDate><ttl>60</ttl><item><title>apache2 jk_module + tomcat6 ajp + solrj3.5�l�合的一个bug</title><link>http://www.aygfsteel.com/atealxt/archive/2012/02/29/apache2_jk_module_tomcat6_ajp_solrj3dot5_bug.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Wed, 29 Feb 2012 08:45:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2012/02/29/apache2_jk_module_tomcat6_ajp_solrj3dot5_bug.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/371013.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2012/02/29/apache2_jk_module_tomcat6_ajp_solrj3dot5_bug.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/371013.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/371013.html</trackback:ping><description><![CDATA[<div>�?台linux服务器，一台布apache�Q�A�Q�和tomcat应用�E�序�Q�B�Q�，一台布solr���理�q�_��(C)�?br /><br />发现的bug为：<br />前台讉K��A�Q�A转发�l�B�Q�B再访问C�Q�访问失败�?br /><br />�l�试验，web server和app server不能攑ֈ�一台服务器上，否则通过apache代理�Q�app server调用solrj会因获取不到�q�接而失败�?br /><br />目前跟踪调查�?br />org.apache.solr.client.solrj.impl.CommonsHttpSolrServer<br />-&gt;<br />org.apache.commons.httpclient.HttpClient<br />-&gt;<br />org.apache.commons.httpclient.MultiThreadedHttpConnectionManager<br /><br />httpclient的版本是3.1�Q�怀疑是MultiThreadedHttpConnectionManager自定义的池出的问题�?br />�|�上搜了搜，没什么相兌���料。最�q�太忙，没精力刨栚w��底了。暂时改了solrj源码�Q���用了默认的new HttpClient()<br />有谁也遇到类似问题�ƈ解决了，或知道怎么回事�Q�麻烦告知一下�?br /><br />PS:<br />solr更新�q�么�q�速，为啥不把httpclient升��一�?br /></div><br /> <div><embed id="lingoes_plugin_object" type="application/lingoes-npruntime-capture-word-plugin" height="0" hidden="true" width="0"></div><img src ="http://www.aygfsteel.com/atealxt/aggbug/371013.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2012-02-29 16:45 <a href="http://www.aygfsteel.com/atealxt/archive/2012/02/29/apache2_jk_module_tomcat6_ajp_solrj3dot5_bug.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>ActiveMQ Failover Transport Options�Q�翻译）</title><link>http://www.aygfsteel.com/atealxt/archive/2011/12/28/activemq_failover_transport_options_chinese_translation.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Wed, 28 Dec 2011 02:35:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/12/28/activemq_failover_transport_options_chinese_translation.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/367385.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/12/28/activemq_failover_transport_options_chinese_translation.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/367385.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/367385.html</trackback:ping><description><![CDATA[<div>
<div>最�q�又折腾起了activemq。见Failover的文档没有中文的�Q�就��手�l�翻了：
<h3>Apache ActiveMQ - The Failover Transport Options</h3>
<div>
<table border="1">
     <thead>
         <tr style="background-color: #F0F0F0; border-color: #CCCCCC; border-style: solid; border-width: 1px; padding: 3px 4px; text-align: center; ">
             <th>Option Name</th> <th> Default Value </th> <th> Description </th>
         </tr>
     </thead>
     <tbody>
         <tr>
             <td>initialReconnectDelay </td>
             <td> 10 </td>
             <td>
             <div>�W�一�ơ重�q�的旉���间隔�Q�毫�U�）</div>
             </td>
         </tr>
         <tr>
             <td> maxReconnectDelay </td>
             <td> 30000 </td>
             <td>
             <div>最镉K���q�的旉���间隔�Q�毫�U�）</div>
             </td>
         </tr>
         <tr>
             <td> useExponentialBackOff </td>
             <td> true </td>
             <td>
             <div>重连旉���间隔是否以指数�Ş式增�?/div>
             </td>
         </tr>
         <tr>
             <td> backOffMultiplier </td>
             <td> 2.0 </td>
             <td>
             <div>指数的�?/div>
             </td>
         </tr>
         <tr>
             <td> maxReconnectAttempts </td>
             <td> -1 &gt;= AMQ v5.6 <br />
             0 &lt; AMQ v5.6, </td>
             <td>
             <div>自版�?.6��P��-1为默认��|��代表不限重试�ơ数�Q?代表从不重试�Q�只���试�q�接一�ơ，�q�不重连�Q?br />
             5.6以前的版本：0为默认��|��代表不限重试�ơ数<br />
             所有版本：如果讄���为大�?的数�Q�代表最大重试次�?/div>
             </td>
         </tr>
         <tr>
             <td> startupMaxReconnectAttempts </td>
             <td> 0 </td>
             <td>
             <div>初始化时的最大重�q�次数。一旦连接上�Q�将使用<strong>maxReconnectAttempts</strong>的配�|?/div>
             </td>
         </tr>
         <tr>
             <td> randomize </td>
             <td> true </td>
             <td>
             <div>使用随机链接�Q�注�Q�达到负载均衡的目的�Q?/div>
             </td>
         </tr>
         <tr>
             <td> backup </td>
             <td> false </td>
             <td>
             <div>提前初始化一个未使用�q�接�Q�以便进行快速失败�{�U?/div>
             </td>
         </tr>
         <tr>
             <td> timeout </td>
             <td> -1 </td>
             <td>
             <div>讄���发送操作的总计最大超时时��_��毫秒�Q?/div>
             </td>
         </tr>
         <tr>
             <td> trackMessages </td>
             <td> false </td>
             <td>
             <div>在重�q�过�E�中�~�存消息</div>
             </td>
         </tr>
         <tr>
             <td> maxCacheSize </td>
             <td> 131072 </td>
             <td>
             <div>�~�存的最大字节数</div>
             </td>
         </tr>
         <tr>
             <td> updateURIsSupported </td>
             <td> true </td>
             <td>
             <div>
             <div>
             <div>讑֮�是否可以动态修改broker uri�Q�自版本5.4��P��</div>
             </div>
             </div>
             </td>
         </tr>
     </tbody>
</table>
</div>
<br />
</div>
</div>
<div><embed id="lingoes_plugin_object" type="application/lingoes-npruntime-capture-word-plugin" height="0" hidden="true" width="0"></div><img src ="http://www.aygfsteel.com/atealxt/aggbug/367385.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-12-28 10:35 <a href="http://www.aygfsteel.com/atealxt/archive/2011/12/28/activemq_failover_transport_options_chinese_translation.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>看图说话 - 中国�E�序员对企业的忠诚度</title><link>http://www.aygfsteel.com/atealxt/archive/2011/09/01/chinese_coder_enterprise_loyalty_report.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Thu, 01 Sep 2011 07:31:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/09/01/chinese_coder_enterprise_loyalty_report.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/357742.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/09/01/chinese_coder_enterprise_loyalty_report.html#Feedback</comments><slash:comments>5</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/357742.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/357742.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 标题��L��有些大，仅代表自己和�w�边一些�h从业�q�几�q�来的感�?P&nbsp;&nbsp;<a href='http://www.aygfsteel.com/atealxt/archive/2011/09/01/chinese_coder_enterprise_loyalty_report.html'>阅读全文</a><img src ="http://www.aygfsteel.com/atealxt/aggbug/357742.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-09-01 15:31 <a href="http://www.aygfsteel.com/atealxt/archive/2011/09/01/chinese_coder_enterprise_loyalty_report.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>MySQL��M��复制失效的问�?/title><link>http://www.aygfsteel.com/atealxt/archive/2011/06/24/mysql_master_slave_replication_inactivation.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Fri, 24 Jun 2011 08:47:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/06/24/mysql_master_slave_replication_inactivation.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/352977.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/06/24/mysql_master_slave_replication_inactivation.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/352977.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/352977.html</trackback:ping><description><![CDATA[现象�Q?br /><div>JDBC执行 UPDATE DB_NAME.TABLE_NAME SET COLUMN_NAME xxxx;<br />然后操作�q�不计入mysql binlog�Q�主从复制失效�?br /><br />发生条�g�Q?br />1、MySQL 5.1 (理论�?.1+)<br />2、SQL语句指定库名/跨库执行�Q�之前没有指到这个库下面(use DATABASE_NAME )<br />3、MySQL��M��配置没有�?-replicate-wild-do-table=<em>db_name</em>.%<br /><br />解决办法�Q?br />在主从配�|�文件内加入参数<br /><div>--replicate-wild-do-table=<em>db_name</em>.%</div><br />参考文档：<br />MySQL官方文档<br /><div><a target="_blank" >MySQL中的复制 -&gt; 复制启动选项</a><br /></div></div><img src ="http://www.aygfsteel.com/atealxt/aggbug/352977.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-06-24 16:47 <a href="http://www.aygfsteel.com/atealxt/archive/2011/06/24/mysql_master_slave_replication_inactivation.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>VJET - 让Eclipse支持JQuery�{�Javascript library语法提示</title><link>http://www.aygfsteel.com/atealxt/archive/2011/06/08/VJET_Eclipse_Javascript_Plugin.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Wed, 08 Jun 2011 05:48:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/06/08/VJET_Eclipse_Javascript_Plugin.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/351910.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/06/08/VJET_Eclipse_Javascript_Plugin.html#Feedback</comments><slash:comments>1</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/351910.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/351910.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: VJET JavaScript IDE 是一个Eclipse插�g�Q�提供了整套的Javascript开发环境：语法提示、自动补全、高亮、编辑纠错、debug�{��?<br>比�vAptana来，VJET更加轻量�Q�速度也更快�?nbsp;&nbsp;<a href='http://www.aygfsteel.com/atealxt/archive/2011/06/08/VJET_Eclipse_Javascript_Plugin.html'>阅读全文</a><img src ="http://www.aygfsteel.com/atealxt/aggbug/351910.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-06-08 13:48 <a href="http://www.aygfsteel.com/atealxt/archive/2011/06/08/VJET_Eclipse_Javascript_Plugin.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Java泛型丢失���查的问题</title><link>http://www.aygfsteel.com/atealxt/archive/2011/05/31/java_generic_defect.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Tue, 31 May 2011 02:31:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/05/31/java_generic_defect.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/351388.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/05/31/java_generic_defect.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/351388.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/351388.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: JDK1.5引入的泛型，减少了类型强转的代码�Q�增加了�~�译���查，提高了代码的健壮性�?<br>但在某些情况�Q�泛型检查会��Z��意料的“丢失”，由此可引发难以发现的bug�?nbsp;&nbsp;<a href='http://www.aygfsteel.com/atealxt/archive/2011/05/31/java_generic_defect.html'>阅读全文</a><img src ="http://www.aygfsteel.com/atealxt/aggbug/351388.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-05-31 10:31 <a href="http://www.aygfsteel.com/atealxt/archive/2011/05/31/java_generic_defect.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>��M���W�记 —�?Oracle Database 9i/10g/11g�~�程艺术</title><link>http://www.aygfsteel.com/atealxt/archive/2011/03/17/book_read_note_oracle_database_9i10gand11g_programming_techniques_and_solutions.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Thu, 17 Mar 2011 14:19:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/03/17/book_read_note_oracle_database_9i10gand11g_programming_techniques_and_solutions.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/346498.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/03/17/book_read_note_oracle_database_9i10gand11g_programming_techniques_and_solutions.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/346498.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/346498.html</trackback:ping><description><![CDATA[如果别�h只是��d��数据�Q�FOR UPDATE��׃��会锁定资源不让他们读<br />
sum,count�{�函��Cؓ表锁<br />
null不等于�Q何��|��包括它自�?br />
���量不要使用LONG型字�D�，而考虑使用CLOB<br />
与不可重复读的区别在于：在��像读中，已经��d��的数据不会改变，只是与以前相比，会有更多的数据满���你的查询条�?br />
客户端发出的语句�Q�如INSERT INTO�Q�是原子性的<br />
应慎用IMMEDIATE�U�束。一条语句可能会使表中的各行暂时&#8220;不一�?#8221;�Q�这是很自然的�?br />
一般认为，用更新��联来修改主键是很不好的做�?br />
应手动给外键加烦引，否则会引起子表的表锁�?br />
优化期会对视囄���来源表��用查询。所以，对视囑֊�索引不如直接�Ҏ��源表�q�行索引优化�?br />
<br />
无法通过频繁提交�?#8220;节省&#8221;undo�I�间�Q�所以没有必要在循环中提交�?br />
1、事务的�_�度�Q�时长）应设计的���可能小�Q�短�Q?br />
2、事务不是稀�~����源，所以不要在循环中提�?br />
以上2个说法都正确�Q��ƈ不矛盾：<br />
Re1: 事务�q�大�Q�会在rollback时消耗大量资�?br />
Re2: 循环提交会频�J�IO<br />
<br />
性能调优�Q�应首先���试减少查询的运行时��_��其次再考虑讄���参数�{��?br />
查询中最好手动加上order by<br />
索引�l�织表（IOT�Q�是存储在烦引结构中的表�Q�适合OLAP应用。IOT不存在主键的�I�间开销�Q�因为烦引就是输据�?br />
位图索引适用于高度重复而且通常只读的数据（在OLTP中慎用，涉及到�ƈ发性）。在��d��集的环境中能很好的工作，但极不适用于写密集环境�?br />
仅当要通过索引讉K��表中很少的一部分行（很小的一个百分比�Q�时�Q�才使用B*索引。每个唯一�U�束应该臛_��有一个确实唯一的NOT NULL列。B*树烦引不会对一个完全�ؓNULL的项加烦引�?br />
<br />
http://atealxt.appspot.com/article/20110317/book_read_note_oracle_database_9i10gand11g_programming_techniques_and_solutions.html<br />
<img src ="http://www.aygfsteel.com/atealxt/aggbug/346498.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-03-17 22:19 <a href="http://www.aygfsteel.com/atealxt/archive/2011/03/17/book_read_note_oracle_database_9i10gand11g_programming_techniques_and_solutions.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>eclipse3.6升��后无法启�?/title><link>http://www.aygfsteel.com/atealxt/archive/2011/03/09/eclipse_cannot_startup_when_update_to_helios_SR2.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Wed, 09 Mar 2011 08:17:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/03/09/eclipse_cannot_startup_when_update_to_helios_SR2.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/346032.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/03/09/eclipse_cannot_startup_when_update_to_helios_SR2.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/346032.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/346032.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 使用"help" -> "Check for Updates", 选择所有eclipse插�g�Q�升�U��?<br>升��完重启时�Q�发生错误，IDE启动��p�|�Q�报错�?<br>
<br>
<br>解决办法�Q?<br>修改文�g "ECLIPSE_HOME\configuration\config.ini"�?nbsp;&nbsp;<a href='http://www.aygfsteel.com/atealxt/archive/2011/03/09/eclipse_cannot_startup_when_update_to_helios_SR2.html'>阅读全文</a><img src ="http://www.aygfsteel.com/atealxt/aggbug/346032.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-03-09 16:17 <a href="http://www.aygfsteel.com/atealxt/archive/2011/03/09/eclipse_cannot_startup_when_update_to_helios_SR2.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>��M���W�记 —�?MySQL技术内�q?InnoDB存储引擎</title><link>http://www.aygfsteel.com/atealxt/archive/2011/02/28/mysql_study_note_9787111321880_B004F9PL2O.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Mon, 28 Feb 2011 15:16:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2011/02/28/mysql_study_note_9787111321880_B004F9PL2O.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/345382.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2011/02/28/mysql_study_note_9787111321880_B004F9PL2O.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/345382.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/345382.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 限于自己的水�q����未达到DBA�U�别�Q�只能先以应用�ؓ�ȝ��角度��M���?<br>也许�q�几个月再回来重读，会有另一番心得�?<br>
<br>�W�记包含索引、事务与锁、备份及其他四类�?<br>&nbsp;&nbsp;<a href='http://www.aygfsteel.com/atealxt/archive/2011/02/28/mysql_study_note_9787111321880_B004F9PL2O.html'>阅读全文</a><img src ="http://www.aygfsteel.com/atealxt/aggbug/345382.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2011-02-28 23:16 <a href="http://www.aygfsteel.com/atealxt/archive/2011/02/28/mysql_study_note_9787111321880_B004F9PL2O.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>使用Apache DBUtils的batch提交遇到的的NullPointerException</title><link>http://www.aygfsteel.com/atealxt/archive/2010/12/13/ORACLE_JDBC_DRIVER_DBUTILS.html</link><dc:creator>Atea</dc:creator><author>Atea</author><pubDate>Mon, 13 Dec 2010 08:05:00 GMT</pubDate><guid>http://www.aygfsteel.com/atealxt/archive/2010/12/13/ORACLE_JDBC_DRIVER_DBUTILS.html</guid><wfw:comment>http://www.aygfsteel.com/atealxt/comments/340517.html</wfw:comment><comments>http://www.aygfsteel.com/atealxt/archive/2010/12/13/ORACLE_JDBC_DRIVER_DBUTILS.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/atealxt/comments/commentRss/340517.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/atealxt/services/trackbacks/340517.html</trackback:ping><description><![CDATA[错误日志为：<br />
<div style="background-color: #eeeeee; font-size: 13px; border: 1px solid #cccccc; padding: 4px 5px 4px 4px; width: 98%;"><!--<br />
<br />
Code highlighting produced by Actipro CodeHighlighter (freeware)<br />
http://www.CodeHighlighter.com/<br />
<br />
--><span style="color: #000000;">java.lang.NullPointerException<br />
&nbsp;&nbsp;&nbsp;&nbsp;at&nbsp;oracle.jdbc.dbaccess.DBData.clearItem(DBData.java:</span><span style="color: #000000;">431</span><span style="color: #000000;">)<br />
&nbsp;&nbsp;&nbsp;&nbsp;at&nbsp;oracle.jdbc.dbaccess.DBDataSetImpl.clearItem(DBDataSetImpl.java:</span><span style="color: #000000;">3528</span><span style="color: #000000;">)<br />
&nbsp;&nbsp;&nbsp;&nbsp;at&nbsp;oracle.jdbc.driver.OraclePreparedStatement.checkBindTypes(OraclePreparedStatement.java:</span><span style="color: #000000;">3271</span><span style="color: #000000;">)<br />
&nbsp;&nbsp;&nbsp;&nbsp;at&nbsp;oracle.jdbc.driver.OraclePreparedStatement.setNull(OraclePreparedStatement.java:</span><span style="color: #000000;">1322</span><span style="color: #000000;">)<br />
&nbsp;&nbsp;&nbsp;&nbsp;at&nbsp;org.apache.commons.dbutils.QueryRunner.fillStatement(QueryRunner.java:</span><span style="color: #000000;">197</span><span style="color: #000000;">)<br />
&nbsp;&nbsp;&nbsp;&nbsp;at&nbsp;org.apache.commons.dbutils.QueryRunner.batch(QueryRunner.java:</span><span style="color: #000000;">122</span><span style="color: #000000;">)</span></div>
<br />
也是�|�上搜了半天�Q�查了不���原因，未果�?br />
最后试着更新了一下jdbc驱动�Q�原来是oracle较早版本的jdbc驱动bug所致�?br />
��d���|�下载一个所对应oracle版本的最新jdbc驱动���OK了�?br />
<br />
<img src ="http://www.aygfsteel.com/atealxt/aggbug/340517.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/atealxt/" target="_blank">Atea</a> 2010-12-13 16:05 <a href="http://www.aygfsteel.com/atealxt/archive/2010/12/13/ORACLE_JDBC_DRIVER_DBUTILS.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                                               <footer>
<div class="friendship-link">
<a href="http://www.aygfsteel.com/" title="&#29408;&#29408;&#20037;&#20037;&#20122;&#27954;&#27431;&#32654;&#19987;&#21306;&#95;&#20013;&#25991;&#23383;&#24149;&#20122;&#27954;&#32508;&#21512;&#20037;&#20037;&#50;&#48;&#50;&#95;&#22269;&#20135;&#31934;&#21697;&#20122;&#27954;&#31532;&#20116;&#21306;&#22312;&#32447;&#95;&#26085;&#26412;&#20813;&#36153;&#32593;&#31449;&#35270;&#39057;">&#29408;&#29408;&#20037;&#20037;&#20122;&#27954;&#27431;&#32654;&#19987;&#21306;&#95;&#20013;&#25991;&#23383;&#24149;&#20122;&#27954;&#32508;&#21512;&#20037;&#20037;&#50;&#48;&#50;&#95;&#22269;&#20135;&#31934;&#21697;&#20122;&#27954;&#31532;&#20116;&#21306;&#22312;&#32447;&#95;&#26085;&#26412;&#20813;&#36153;&#32593;&#31449;&#35270;&#39057;</a>

</div>

</footer>


��վ֩���ģ�壺
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">�����</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">�崨��</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">����</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">��Զ��</a>|
<a href="http://" target="_blank">��̨��</a>|
<a href="http://" target="_blank">��������</a>|
<a href="http://" target="_blank">�Ƿ���</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">��ԣ��</a>|
<a href="http://" target="_blank">�౱</a>|
<a href="http://" target="_blank">��ľ��</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">��ˮ��</a>|
<a href="http://" target="_blank">����</a>|
<a href="http://" target="_blank">ȫ����</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">��ʷ</a>|
<a href="http://" target="_blank">��ϼ��</a>|
<a href="http://" target="_blank">����</a>|
<a href="http://" target="_blank">�����غ���</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">ͬ����</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">ѭ��</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">�����</a>|
<a href="http://" target="_blank">�ʶ���</a>|
<a href="http://" target="_blank">�ɳ���</a>|
<a href="http://" target="_blank">������</a>|
<a href="http://" target="_blank">�뵺��</a>|
<a href="http://" target="_blank">������</a>|
<script>
(function(){
    var bp = document.createElement('script');
    var curProtocol = window.location.protocol.split(':')[0];
    if (curProtocol === 'https') {
        bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
    }
    else {
        bp.src = 'http://push.zhanzhang.baidu.com/push.js';
    }
    var s = document.getElementsByTagName("script")[0];
    s.parentNode.insertBefore(bp, s);
})();
</script>
</body>