Using Commons-logging's Notes

Commons-logging is a jarkata that encapsulates a variety of Java logs, such as log4j, JDK log, Logkit, Nooplog, and Simplelog.

Eclipse can use the LOG4E plug-in, quickly insert the Logger object, set the log4e template for the commons-logging template on it. And at the same time put commons-logging and log4j jar packs as far as the engineering classpath.

In a class MyClass code editing page, right-click Select LOG4E, select Declare logger, that is, add the following code on the basis of the source code, as follows: Import Org.apache.commons.logging.Log;
Import Org.apache.commons.logging.LogFactory;

/** */ /**
* Logger for this class
*/
Private static final Log logger = Logfactory.getlog (MyClass. Class);

Need to add log4j.xml files in the SRC directory, as follows: XML version= "1.0" encoding= "UTF-8"?>
<! DOCTYPE log4j:configuration SYSTEM "LOG4J.DTD" >

< log4j:configuration >

<!--config console= "STDOUT"/-->
< Appender name = "STDOUT" class = "Org.apache.log4j.ConsoleAppender" >
< layout class = "Org.apache.log4j.PatternLayout" >
< param name = "Conversionpattern" value =%d{hh:mm:ss. SSS}%-5p [%t]-%m "/>
</Layout >
</Appender >

<!--config debug= "Debug"/-->
< Appender name = "Debug_log" class = "Org.apache.log4j.RollingFileAppender" >
< param name = "File" value = "Log/debug.log"/>
< param name = "Append" value = "true"/>
< param name = "MaxFileSize" value = "5000KB"/>
< param name = "Maxbackupindex" value = "2"/>
< layout class = "Org.apache.log4j.PatternLayout" >
< param name = "Conversionpattern" value =%d{hh:mm:ss. SSS}%c--%m "/>
</Layout >
< filter class = "Org.apache.log4j.varia.LevelRangeFilter" >
< param name = "Levelmin" value = "DEBUG"/>
< param name = "Levelmax" value = "DEBUG"/>
</Filter >
</Appender >

<!--config info= "info"/-->
< Appender name = "Info_log" class = "Org.apache.log4j.RollingFileAppender" >
< param name = "File" value = "Log/denet.log"/>
< param name = "Append" value = "true"/>
< param name = "MaxFileSize" value = "5000KB"/>
< param name = "Maxbackupindex" value = "2"/>
< layout class = "Org.apache.log4j.PatternLayout" >
< param name = "Conversionpattern" value = "%d{iso8601}%c--%m"/>
</Layout >
< filter class = "Org.apache.log4j.varia.LevelRangeFilter" >
< param name = "Levelmin" value = "INFO"/>
< param name = "Levelmax" value = "INFO"/>
</Filter >
</Appender >

<!--config error= "error"/-->
< Appender name = "Error_log" class = "Org.apache.log4j.RollingFileAppender" >
< param name = "File" value = "Log/error.log"/>
< param name = "Append" value = "true"/>