�??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;&#31934;&#21697;&#19977;&#32423;&#31934;&#21697;&#97;&#118;&#32593;&#22336;&#13;&#44;&#20122;&#27954;&#19968;&#20108;&#19977;&#21306;&#35270;&#39057;&#44;&#22269;&#20135;&#31934;&#21697;&#20037;&#20037;&#20037;&#19968;&#21306;&#40635;&#35910;&#26368;&#26032;&#31456;&#33410;&#13;</title><link>http://www.aygfsteel.com/licweiwei/category/26522.html</link><description /><language>zh-cn</language><lastBuildDate>Wed, 24 Oct 2007 11:42:24 GMT</lastBuildDate><pubDate>Wed, 24 Oct 2007 11:42:24 GMT</pubDate><ttl>60</ttl><item><title>Commons-logging + Log4j 使用����?/title><link>http://www.aygfsteel.com/licweiwei/articles/155095.html</link><dc:creator>licwei</dc:creator><author>licwei</author><pubDate>Mon, 22 Oct 2007 12:39:00 GMT</pubDate><guid>http://www.aygfsteel.com/licweiwei/articles/155095.html</guid><wfw:comment>http://www.aygfsteel.com/licweiwei/comments/155095.html</wfw:comment><comments>http://www.aygfsteel.com/licweiwei/articles/155095.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/licweiwei/comments/commentRss/155095.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/licweiwei/services/trackbacks/155095.html</trackback:ping><description><![CDATA[<span style="font-size: 10pt; font-family: Times New Roman">通过�|�上查找资料和项目中的一些应用，记录一�?font size="2">Commons-logging + Log4j </font>的��用方法�?br />
现在很多都是使用Commons-logging + Log4j �l�合使用�Q�而不是全部��用Log4j。common-logging,���可以自行决定在自己的应用中采用何种实现�Q��ƈ跟所依赖的jar包统一��h���?br />
据common-logging的官�Ҏ��档，军_��实现方式的策略如下： <br />
1.首先查找org.apache.commons.logging.Log属性，该属性可以在java代码中设�|�，更常见的是在classpath下的common-logging.properties文�g中进行设�|?<br />
2.在系�l�属性中查找org.apache.commons.logging.Log <br />
3.如果�c��\径中有log4j的jar包，则采用log4j实现 <br />
4.如果jdk版本�?.4�Q�采用Jdk14Logger <br />
5.采用common-logging提供的SimpleLog <br />
<br />
所以只要在classpath中加入Log4j的jar�Q�Commons-logging 后台使用的还是Log4j作�ؓ日志实现�c�R��单独��用Log4j的时候需要初始化�Q?br />
<br />
&nbsp;&nbsp;
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; import org.apache.log4j.Logger; </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; import org.apache.log4j.PropertyConfigurator; </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; public class Log4j { </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; static Logger logger = Logger.getLogger(Log4j .class); </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; public static void main(String args[]) { </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color: #333399">PropertyConfigurator.configure("log4j.properties"); </span></p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; logger.debug("DEBUG");&nbsp;&nbsp; </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } </p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } <br />
</p>
<br />
<p><font size="+0"><font face="Times New Roman"><font style="font-size: 10pt" size="3"></font></font></font>&nbsp;</p>
&nbsp; 使用Commons-logging + Log4j 实现�Ҏ���Q?<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <font size="2">import org.apache.commons.logging.Log;<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; import org.apache.commons.logging.LogFactory;</font><br />
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-size: 10pt">class TestLog{<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; public static Log log = LogFactory.getLog(TestLog.class);<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; public static void testLog(){<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; log.debug("test Commons-logging + Log4j");<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; }<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br />
只要classpath有Log4j的jar�Q�其实就是��用Log4j作�ؓ实现�c�，但是要注意的�?font face="Times New Roman">log4j.properties</font>一定要在classpath中，之前一直不知道�E�序是如何去扑ֈ�<font face="Times New Roman">log4j.properties</font>的，后来才发现是通过classpath��L��的，如果classpath中没有具体配�|�，���是到当前类所在目录下��L��找（不包括包文�g夹）�?br />
<br />
log4j.properties���介：<br />
log4j.rootCategory=debug,&nbsp;stdout,&nbsp;R&nbsp;&nbsp;<br />
log4j.appender.stdout=org.apache.log4j.ConsoleAppender&nbsp;&nbsp;<br />
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout&nbsp;&nbsp;<br />
#&nbsp;Pattern&nbsp;to&nbsp;output&nbsp;the&nbsp;caller's&nbsp;file&nbsp;name&nbsp;and&nbsp;line&nbsp;number.&nbsp;&nbsp;<br />
log4j.appender.stdout.layout.ConversionPattern=%5p&nbsp;[%t]&nbsp;(%F:%L)&nbsp;-&nbsp;%m%n&nbsp;&nbsp;<br />
log4j.appender.R=org.apache.log4j.RollingFileAppender&nbsp;&nbsp;<br />
log4j.appender.R.File=example.log&nbsp;&nbsp;<br />
log4j.appender.R.MaxFileSize=100KB&nbsp;&nbsp;<br />
#&nbsp;Keep&nbsp;one&nbsp;backup&nbsp;file&nbsp;&nbsp;<br />
log4j.appender.R.MaxBackupIndex=1&nbsp;&nbsp;<br />
log4j.appender.R.layout=org.apache.log4j.PatternLayout&nbsp;&nbsp;<br />
log4j.appender.R.layout.ConversionPattern=%p&nbsp;%t&nbsp;%c&nbsp;-&nbsp;%m%n&nbsp;&nbsp;<br />
说明:&nbsp;&nbsp;<br />
①log4j.rootCategory&nbsp;=&nbsp;[&nbsp;level&nbsp;]&nbsp;,&nbsp;appenderName,&nbsp;appenderName,&nbsp;&nbsp;<br />
其中,level&nbsp;是日志记录的优先�U?分�ؓOFF,FATAL,ERROR,WA&nbsp;R&nbsp;N,INFO,DEBUG,&nbsp;<br />
ALL或者您定义的���?Log4j�����只��用四个���?优先�U�从高到低分别是ERROR,&nbsp;<br />
WA&nbsp;R&nbsp;N,INFO,DEBUG.通过在这里定义的�U�别,您可以控制到应用�E�序中相应��别的�?nbsp;<br />
志信息的开�?比如在这里定义了INFO�U�别,则应用程序中所有DEBUG�U�别的日志信�?nbsp;<br />
���不被打印出�?appenderName���是指定日志信息输出到哪个地�?您可以同时指定多�?nbsp;<br />
输出目的�?&nbsp;&nbsp;<br />
②配�|�日志信息输出目的地Appender,其语法�ؓ&nbsp;&nbsp;<br />
log4j.appender.appenderName&nbsp;=&nbsp;fully.qualified.name.of.appender.class&nbsp;&nbsp;<br />
log4j.appender.appenderName.option1&nbsp;=&nbsp;value1&nbsp;&nbsp;<br />
<br />
log4j.appender.appenderName.option&nbsp;=&nbsp;valueN&nbsp;&nbsp;<br />
其中,Log4j提供的appender有以下几�U?&nbsp;&nbsp;<br />
org.apache.log4j.ConsoleAppender(控制�?,&nbsp;&nbsp;<br />
org.apache.log4j.FileAppender(文�g),&nbsp;&nbsp;<br />
org.apache.log4j.DailyRollingFileAppender(每天产生一个日志文�?,&nbsp;<br />
org.apache.log4j.RollingFileAppender(文�g大小到达指定���寸的时候��生一个新的文�?,&nbsp;&nbsp;<br />
org.apache.log4j.WriterAppender(���日志信息以���格式发送到��L��指定的地�?&nbsp;&nbsp;<br />
③配�|�日志信息的格式(布局),其语法�ؓ:&nbsp;&nbsp;<br />
log4j.appender.appenderName.layout&nbsp;=&nbsp;fully.qualified.name.of.layout.class&nbsp;&nbsp;<br />
log4j.appender.appenderName.layout.option1&nbsp;=&nbsp;value1&nbsp;&nbsp;<br />
<br />
log4j.appender.appenderName.layout.option&nbsp;=&nbsp;valueN&nbsp;&nbsp;<br />
其中,Log4j提供的layout有以下几�U?&nbsp;&nbsp;<br />
org.apache.log4j.HTMLLayout(以HTML表格形式布局),&nbsp;&nbsp;<br />
org.apache.log4j.PatternLayout(可以灉|��地指定布局模式),&nbsp;&nbsp;<br />
org.apache.log4j.SimpleLayout(包含日志信息的��别和信息字符�?,&nbsp;&nbsp;<br />
org.apache.log4j.TTCCLayout(包含日志产生的时�?�U�程,�c�d���{�等信息)&nbsp;&nbsp;<br />
④Log4J采用�c�M��C语言中的printf函数的打印格式格式化日志信息,打印参数如下:&nbsp;&nbsp;<br />
%m&nbsp;输出代码中指定的消息&nbsp;&nbsp;<br />
%p&nbsp;输出优先�U?即DEBUG,INFO,WA&nbsp;R&nbsp;N,ERROR,FATAL&nbsp;&nbsp;<br />
%r&nbsp;输出自应用启动到输出该log信息耗费的毫�U�数&nbsp;&nbsp;<br />
%c&nbsp;输出所属的�cȝ��,通常���是所在类的全�?nbsp;&nbsp;<br />
%t&nbsp;输出产生该日志事件的�U�程�?nbsp;&nbsp;<br />
%n&nbsp;输出一个回车换行符,Windows�q�_���?\r\n",Unix�q�_���?\n"&nbsp;&nbsp;<br />
%d&nbsp;输出日志旉���点的日期或时�?默认格式为ISO8601,也可以在其后指定格式,&nbsp;&nbsp;<br />
比如:%d{yyy&nbsp;MMM&nbsp;dd&nbsp;HH:mm:ss,SSS},输出�c�M��:2002�q?0�?8�?nbsp;22:10:28,921&nbsp;&nbsp;<br />
%l&nbsp;输出日志事�g的发生位�|?包括�cȝ���?发生的线�E?以及在代码中的行�?&nbsp;<br />
�q�里�?点要说明的，<br />
<span style="color: #333399">一是关于log4j.appender.R.File=example.log&nbsp;�Q�如果不�l�定�l�对路径的话�Q�log文�g的默认�\径是user.dir�Q�可以通过System.getProperty("user.dir")来得到�?br />
而是关于%5p&nbsp;[%t]&nbsp;(%F:%L)&nbsp;-&nbsp;%m%n&nbsp;&nbsp; 5代表优先�U�字�W�串占用几个位置�Q?F代表文�g名，%L代表行号�?br />
</span><br />
使用xml来充当配�|�，没有�ȝ���q�，所以也不了解，但是在网上也看到�q�依赖jar包里的log4j配置���自己应用的log4j.properties屏蔽掉的问题�Q�说是classpath中的jxls-core-0.9.5.jar中的log4j.xml,该配�|�优先于他的log4j.properties�Q�导致log4j.properties讄���失效�Q�不�q�不太了解是什么原因，但是有�h�l�出了解��x��案，<br />
<p>手工重新 configure一下：</p>
<p>org.apache.log4j.LogManager.resetConfiguration(); <br />
然后�Q?/p>
<p>org.apache.log4j.PropertyConfigurator.configure("c:/yourlog4j.properties");</p>
<p>或�?/p>
<p>org.apache.log4j.xml.DOMConfigurator.configure("c:/yourlog4j.xml");<br />
</p>
<br />
<br />
<br />
<br />
<br />
<br />
</span>
<img src ="http://www.aygfsteel.com/licweiwei/aggbug/155095.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/licweiwei/" target="_blank">licwei</a> 2007-10-22 20:39 <a href="http://www.aygfsteel.com/licweiwei/articles/155095.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>XML文�g处理�Q�一�Q?/title><link>http://www.aygfsteel.com/licweiwei/articles/152726.html</link><dc:creator>licwei</dc:creator><author>licwei</author><pubDate>Sun, 14 Oct 2007 07:04:00 GMT</pubDate><guid>http://www.aygfsteel.com/licweiwei/articles/152726.html</guid><wfw:comment>http://www.aygfsteel.com/licweiwei/comments/152726.html</wfw:comment><comments>http://www.aygfsteel.com/licweiwei/articles/152726.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/licweiwei/comments/commentRss/152726.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/licweiwei/services/trackbacks/152726.html</trackback:ping><description><![CDATA[<span style="font-size: 10pt">&nbsp;</span><span style="font-size: 10pt"><span style="font-size: 10pt; font-family: Arial">&nbsp; &nbsp;�?Java 领域 XML 文�g的技术大致分��Z���c?XML API �?OXMapping.XML API �?XML 处理的基����Q�可选技术包括JDOM,Dom4j�{�；OXMapping �?Object-XML Mapping 的简�U�ͼ��q�种技术隐藏了 XML 底层操作的细节，可以��?XML 文�g映射成一�?JavaBean 对象�Q�也可以把一�?JavaBean 对象保存成一�?XML 文�g�Q�可选技�?XStream �?Digester �?Castor �{��?XML API �?OXMapping 的关�pȝ����g�� JDBC �?ORMaping 的关�p�， OXMapping 内部实现使用 XML API 来完成，两种实现技术从不同的层面实��C�� XML 的处理�?br />
<br />
</span>&nbsp;&nbsp;&nbsp; <span style="font-size: 10pt; font-family: Arial">XML API </span></span>
<p><span style="font-family: Arial"><span style="font-size: 10pt"><span style="font-size: 10pt">&nbsp;&nbsp;&nbsp;此类 XML 处理技术中最���行的莫�q�于<span style="font-family: Arial"><span style="font-size: 10pt"><span style="font-size: 10pt">DOM4J </span></span></span>了，</span></span></span><span style="font-family: Arial"><span style="font-size: 10pt"><span style="font-size: 10pt">DOM4J 是一个非帔R���怼��U�的Java XML API�Q�具有性能优异、功能强大和极端易用使用的特点，同时它也是一个开放源代码的��Y件。如今你可以看到���来���多�?Java 软�g都在使用 DOM4J 来读�?XML�Q�特别值得一提的是连 Sun �?JAXM 也在�?DOM4J</span></span></span><span style="font-size: 10pt"><span style="font-family: Arial"><span style="font-size: 10pt"><br />
<br />
</span></span>&nbsp;&nbsp;&nbsp;<span style="font-family: Arial">&nbsp; <span style="font-size: 10pt">OXMapping </span></span></span></p>
<p><span style="font-family: Arial"><span style="font-size: 10pt"><span style="font-size: 10pt">&nbsp;&nbsp;&nbsp; 使用 XML API 解析是略昄���琐的�Q�受 ORMapping 技术的启发�Q��h们发明了 OXMapping 技术，使用 OXMapping 技术，我们可以��?XML 文�g映射成一�?JavaBean 对象�Q�也可以把一�?JavaBean 对象保存成一�?XML 文�g�Q�这大大���化了我们的开发工作量�Q���得开发�h员能更多的关注应用层面的东西�?</span></span></span></p>
<p><span style="font-family: Arial"><span style="font-size: 10pt">&nbsp;&nbsp;<span style="font-size: 10pt">&nbsp; 开源世界中涌现出很�?OXMapping 框架�Q�包�?XStream �?Digester �?Castor �{��?其中Digester �?#8220;开源名�?#8221; Apache 下的子项目，�|�上可以参考的资料很多�?/span><br />
</span></span></p>
<p><br />
</p>
<img src ="http://www.aygfsteel.com/licweiwei/aggbug/152726.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/licweiwei/" target="_blank">licwei</a> 2007-10-14 15:04 <a href="http://www.aygfsteel.com/licweiwei/articles/152726.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Tai Wan Shroff的arnList </title><link>http://www.aygfsteel.com/licweiwei/articles/152618.html</link><dc:creator>licwei</dc:creator><author>licwei</author><pubDate>Sat, 13 Oct 2007 10:59:00 GMT</pubDate><guid>http://www.aygfsteel.com/licweiwei/articles/152618.html</guid><wfw:comment>http://www.aygfsteel.com/licweiwei/comments/152618.html</wfw:comment><comments>http://www.aygfsteel.com/licweiwei/articles/152618.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/licweiwei/comments/commentRss/152618.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/licweiwei/services/trackbacks/152618.html</trackback:ping><description><![CDATA[<p><font face="Arial"><font face="Arial" size="2">今天打算修改Tai Wan Shroff的传递arnList方式.</font></font></p>
<p><font face="Arial" size="2">开始以为用一个static 变量来保存这个List���可以了�Q�还自我得意了一下，以�ؓ改进很大。当时在意的是这个static变量会不会被垃圾回收�Q�后来上�|�查了很多才发现static变量是很JVM共存亡的。只要class被load�q�入容器�Q�就会一直存在于容器�?/font></p>
<p><font face="Arial" size="2">后来陈林一提醒才发现这有多么愚蠢，只要�q�个功能出现�q�发讉K���Q�那arnList���成了随意修改了�Q�收�׃ؕ套了.......后来又想了一个办法，��Z��个static的map用一个随机的32��C��为key�Q�来作�ؓ一�ơ访问的唯一标识�Q�每�ơsearch�Ӟ��。不�q�用map的话要注意内存的回收�Q�用完过后要把每�ơ的映射删除�Q�不然内存就暴掉了�?/font></p>
<p><font face="Arial" size="2">不过后来发现search功能是随旉���可以做的�Q�根本就无法删除无用的映���，�q�个�Ҏ��又流产了。最后无奈只好还是用原来的笨�Ҏ��把arnList hidden在页面上�?/font></p>
<p><font face="Arial" size="2">觉得struts不能传递List实在是太挫了。只能用数组来��@环List中的数据�Q�不知道其他的框架可不可以传递List�?/font></p>
<p><font face="Arial" size="2">发现对java的了解还是太���了�Q�一�q�多一炚w���q�也没有。哎�?/font></p>
<img src ="http://www.aygfsteel.com/licweiwei/aggbug/152618.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/licweiwei/" target="_blank">licwei</a> 2007-10-13 18:59 <a href="http://www.aygfsteel.com/licweiwei/articles/152618.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                                                                       <footer>
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