log4j.xml示例

向右看齐 2023-02-15 05:05 17阅读 0赞

这是log4j属性文件的XML版本，仅用于共享。

## 1.输出到控制台 ##

将日志记录重定向到控制台。

log4j.xml

## 2.输出到文件 ##

将日志记录重定向到文件。

log4j.xml

<?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="file" class="org.apache.log4j.RollingFileAppender">
    	   <param name="append" value="false" />
    	   <param name="maxFileSize" value="10KB" />
    	   <param name="maxBackupIndex" value="5" />
    	   
    	   <param name="file" value="${catalina.home}/logs/myStruts1App.log" />
    	   <layout class="org.apache.log4j.PatternLayout">
    		<param name="ConversionPattern" 
    			value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
    	   </layout>
    	</appender>
    
    	<root>
    		<level value="ERROR" />
    		<appender-ref ref="file" />
    	</root>
    
    </log4j:configuration>

log4j滚动文件的示例。

![struts1-log4j文件][struts1-log4j]![struts1-log4j文件][struts1-log4j 1]

## 3.输出到控制台和文件 ##

将日志记录输出到控制台和文件的完整示例。

log4j.xml

<?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="console" class="org.apache.log4j.ConsoleAppender">
    	    <layout class="org.apache.log4j.PatternLayout">
    		<param name="ConversionPattern" 
    			value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
    	    </layout>
    	</appender>
    
    	<appender name="file" class="org.apache.log4j.RollingFileAppender">
    	    <param name="append" value="false" />
    	    <param name="maxFileSize" value="10MB" />
    	    <param name="maxBackupIndex" value="10" />
    	    <param name="file" value="${catalina.home}/logs/myStruts1App.log" />
    	    <layout class="org.apache.log4j.PatternLayout">
    		<param name="ConversionPattern" 
    			value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
    	    </layout>
    	</appender>
    
    	<root>
    		<level value="DEBUG" />
    		<appender-ref ref="console" />
    		<appender-ref ref="file" />
    	</root>
    
    </log4j:configuration>

## 参考文献 ##

1.  [Log4j 1.2手册][Log4j 1.2]
2.  [Log4j PatternLayout JavaDoc][]
3.  [log4j.properties示例][log4j.properties]

标签： [log4j][]

> 翻译自: [https://mkyong.com/logging/log4j-xml-example/][https_mkyong.com_logging_log4j-xml-example]

[struts1-log4j]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L3N0cnV0czEtbG9nNGotZmlsZS5wbmc?x-oss-process=image/format,png
[struts1-log4j 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9zdHJ1dHMxLWxvZzRqLWZpbGUucG5n?x-oss-process=image/format,png
[Log4j 1.2]: http://logging.apache.org/log4j/1.2/manual.html
[Log4j PatternLayout JavaDoc]: http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/PatternLayout.html
[log4j.properties]: http://www.mkyong.com/logging/log4j-log4j-properties-examples/
[log4j]: https://mkyong.com/tag/log4j/
[https_mkyong.com_logging_log4j-xml-example]: https://mkyong.com/logging/log4j-xml-example/