blocks|key|1279984|text|典型的做法是在类路径中放置一个log4j.properties文件。log4j文档将告诉您关于为控制台和一个文件添加两个附加器所需了解的所有内容，在它们的示例中有介绍。换句话说，不要纠结于不太常见的XML格式，坚持使用非常常见的属性格式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1279985|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The typical thing to do is to put a log4j.properties file in your classpath. The log4j doc will tell you all you need to know about having two appenders for the console and a file, it's in their examples. In other words, don't bother with the less common XML format and stick with the very common properties format.

blocks|key|1065239|text|只需在log4j.xml中有多个附加器，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1065240|<?xml+version="1.0"+encoding="UTF-8"+?>
<!DOCTYPE+log4j:configuration+SYSTEM+"log4j.dtd">
<log4j:configuration+debug="true"
+++++++++++++++++++++xmlns:log4j='http://jakarta.apache.org/log4j/'>

+++<appender+name="consoleAppender"+class="org.apache.log4j.ConsoleAppender">
++++++<layout+class="org.apache.log4j.PatternLayout">
+++++++++<param+name="ConversionPattern"+value="%25d{dd+MMM+yyyy+HH:mm:ss}+%255p+%25c{1}+-+%25m%25n"/>
++++++</layout>
+++</appender>

+++<appender+name="fileAppender"+class="org.apache.log4j.RollingFileAppender">
++++++<param+name="append"+value="false"/>
++++++<param+name="file"+value="out/learning.log"/>
++++++<layout+class="org.apache.log4j.PatternLayout">
+++++++++<param+name="ConversionPattern"+value="%25d{ABSOLUTE}+%25-5p+[%25c{1}]+%25m%25n"/>
++++++</layout>
+++</appender>

+++<root>
++++++<level+value="INFO"/>
++++++<appender-ref+ref="consoleAppender"/>
++++++<appender-ref+ref="fileAppender"/>
+++</root>

</log4j:configuration>|code-block|syntax|javascript|1065241|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Just have more than one appender in your log4j.xml, like this: 

<pre><code>&lt;?xml version="1.0" encoding="UTF-8" ?&gt;
&lt;!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"&gt;
&lt;log4j:configuration debug="true"
 xmlns:log4j='http://jakarta.apache.org/log4j/'&gt;

 &lt;appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender"&gt;
 &lt;layout class="org.apache.log4j.PatternLayout"&gt;
 &lt;param name="ConversionPattern" value="%d{dd MMM yyyy HH:mm:ss} %5p %c{1} - %m%n"/&gt;
 &lt;/layout&gt;
 &lt;/appender&gt;

 &lt;appender name="fileAppender" class="org.apache.log4j.RollingFileAppender"&gt;
 &lt;param name="append" value="false"/&gt;
 &lt;param name="file" value="out/learning.log"/&gt;
 &lt;layout class="org.apache.log4j.PatternLayout"&gt;
 &lt;param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n"/&gt;
 &lt;/layout&gt;
 &lt;/appender&gt;

 &lt;root&gt;
 &lt;level value="INFO"/&gt;
 &lt;appender-ref ref="consoleAppender"/&gt;
 &lt;appender-ref ref="fileAppender"/&gt;
 &lt;/root&gt;

&lt;/log4j:configuration&gt;
</code></pre>

blocks|key|1280084|text|这是Hibernate中使用的log4j.xml的一个示例，project.Just需要将该文件放在类路径中，您将在控制台和文件also.If中获得日志消息，您可以在标记中更改任何特定的附加器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1280085|<?xml+version="1.0"+encoding="UTF-8"?>++
<!DOCTYPE+log4j:configuration+SYSTEM+"log4j.dtd">++
<log4j:configuration+xmlns:log4j="http://jakarta.apache.org/log4j/"++
++++debug="false">++
<appender+name="CONSOLE"+class="org.apache.log4j.ConsoleAppender">++
+<layout+class="org.apache.log4j.PatternLayout">++
++<param+name="ConversionPattern"+value="[%25d{dd/MM/yy+hh:mm:ss:sss+z}]+%255p+%25c{2}:+%25m%25n"+/>++
+</layout>++
</appender>++
++++<appender+name="ASYNC"+class="org.apache.log4j.AsyncAppender">++
++++++++<appender-ref+ref="CONSOLE"+/>++
++++++++<appender-ref+ref="FILE"+/>++
</appender>++
<appender+name="FILE"+class="org.apache.log4j.RollingFileAppender">++
++++<param+name="File"+value="C:/hibernatelog.log"/>++
++++<param+name="MaxBackupIndex"+value="100"+/>++
+<layout+class="org.apache.log4j.PatternLayout">++
++<param+name="ConversionPattern"+value="[%25d{dd/MM/yy+hh:mm:ss:sss+z}]+%255p+%25c{2}:+%25m%25n"+/>++
</layout>++
</appender>++
++++<category+name="org.hibernate">++
++++++++<priority+value="DEBUG"+/>++
++++</category>++
++++<category+name="java.sql">++
++++++++<priority+value="debug"+/>++
++++</category>++
++++<root>++
++++++++<priority+value="INFO"+/>++
++++++++<appender-ref+ref="ASYNC"+/>++
++++</root>++
</log4j:configuration>++|code-block|syntax|javascript|1280086|我发现这个更具描述性，而不是one.Hope+it+help。|1280087|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Here is one sample example of log4j.xml used in Hibernate project.Just need to place this file in classpath and you will get log messages on console as well as in file also.If you want any specific appender you can change in tag.

<pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; 
&lt;!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"&gt; 
&lt;log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" 
 debug="false"&gt; 
&lt;appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender"&gt; 
 &lt;layout class="org.apache.log4j.PatternLayout"&gt; 
 &lt;param name="ConversionPattern" value="[%d{dd/MM/yy hh:mm:ss:sss z}] %5p %c{2}: %m%n" /&gt; 
 &lt;/layout&gt; 
&lt;/appender&gt; 
 &lt;appender name="ASYNC" class="org.apache.log4j.AsyncAppender"&gt; 
 &lt;appender-ref ref="CONSOLE" /&gt; 
 &lt;appender-ref ref="FILE" /&gt; 
&lt;/appender&gt; 
&lt;appender name="FILE" class="org.apache.log4j.RollingFileAppender"&gt; 
 &lt;param name="File" value="C:/hibernatelog.log"/&gt; 
 &lt;param name="MaxBackupIndex" value="100" /&gt; 
 &lt;layout class="org.apache.log4j.PatternLayout"&gt; 
 &lt;param name="ConversionPattern" value="[%d{dd/MM/yy hh:mm:ss:sss z}] %5p %c{2}: %m%n" /&gt; 
&lt;/layout&gt; 
&lt;/appender&gt; 
 &lt;category name="org.hibernate"&gt; 
 &lt;priority value="DEBUG" /&gt; 
 &lt;/category&gt; 
 &lt;category name="java.sql"&gt; 
 &lt;priority value="debug" /&gt; 
 &lt;/category&gt; 
 &lt;root&gt; 
 &lt;priority value="INFO" /&gt; 
 &lt;appender-ref ref="ASYNC" /&gt; 
 &lt;/root&gt; 
&lt;/log4j:configuration&gt; 
</code></pre>

I found this one more descriptive then above one.Hope it help.

Are there any example log4j configuration files (XML).

I have a java main application.

I want log4j to output to console AND write to file.

Any examples of this would be greatly appreciated.

I'm using netbeans if that matters.

Sample xml configuration for log4j, have a 'main' java application and want to write to file

是否有任何示例log4j配置文件。我有一个java主应用程序。我希望log4j输出到控制台并写入文件。任何这样的例子都会非常感谢。如果有必要的话，我正在使用netbeans。

问log4j的示例xml配置，有一个‘主’java应用程序，并想要写入文件
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