log4j2 To configure

Log output format ：

%-5level  Level 
%d{yyy-MM-dd HH:mm:ss.SSS}  date 
%c  Full name of current class 
%M  Current execution method 
%L  Line number 
%t  The thread of 
%m  Information 
%n  Line break 

log4j2.xml Example 1

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
	<properties>
		<property name="logDir">D:/0000/logs</property>
	</properties>
	<Appenders>

		<!--  Console  -->
		<Console name="consoleAppender" target="SYSTEM_ERR">
			<!--pattern: date , The thread of , The level of logging , Log name , Log information , Line break  -->
			<PatternLayout
				pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%t] %c.%M[%L] - %m%n" />
		</Console>

		<!--  file  -->
		<File name="fileAppender" fileName="${logDir}//log4j2.log">
			<PatternLayout
				pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%t] %c.%M[%L] - %m%n" />
		</File>

		<!--  Split logs according to format  -->
		<RollingFile name="rollingFile"
			fileName="${logDir}/rollog.log"
			filePattern="${logDir}/rollog_-%d{yyyyMMdd}-%i">

			<PatternLayout
				pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%t] %c.%M[%L] - %m%n" />

			<Policies>
				<!--  Startup time , Penalty splitting rules , Generate a log file  -->
				<OnStartupTriggeringPolicy />

				<!--  Split by size  -->

				<SizeBasedTriggeringPolicy size="10kb" />

				<!--  Split according to the time node , Split rules filePattern -->
				<TimeBasedTriggeringPolicy />
			</Policies>

			<!--  In the same directory , Maximum number of files , Override if exceeded  -->
			<DefaultRooloverStrategy max="3" />
		</RollingFile>
	</Appenders>


	<Loggers>
		<Root level="trace">
			<AppenderRef ref="consoleAppender" />
			<!-- <AppenderRef ref="fileAppender" /> -->

			<AppenderRef ref="rollingFile" />
		</Root>
	</Loggers>
</Configuration>

log4j2.xml Example 2

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="warn">
    <Properties>
        <!--  Configure the log file output directory , This configuration outputs logs to tomcat The specified folder under the root directory -->
        <Property name="LOG_HOME">logs</Property>
        <!--  Log output format  -->
        <Property name="LOG_PATTERNLAYOUT">[SysLog] [%p] [%d{yyyy-MM-dd HH:mm:ss}] [%l] : %m%n</Property>
    </Properties>

    <Appenders>
        <!--  Console output only level And above (onMatch), Other direct rejection (onMismatch), Currently only output TRACE,DEBUG,INFO  Three  -->
        <!--  Format of output log  -->
        <Console name="console_out_appender" target="SYSTEM_OUT">
            <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="${LOG_PATTERNLAYOUT}"/>
        </Console>

        <!-- INFO The level of log  -->
        <RollingRandomAccessFile name="info_appender" immediateFlush="true" fileName="${LOG_HOME}/sys.log"
                                 filePattern="${LOG_HOME}/sys.log.%d{yyyy-MM-dd}">
            <PatternLayout pattern="${LOG_PATTERNLAYOUT}"/>
            <Policies>
<!--                <SizeBasedTriggeringPolicy size="2MB"/>-->
                <!--  If you enable this configuration , The log will generate a new compressed file by file name ,  That is, if filePattern The date format configured is  %d{yyyy-MM-dd HH}
                    , A compressed file is generated every hour ,  If filePattern The date format configured is  %d{yyyy-MM-dd} , It's a compressed file  -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
            </Policies>
            <DefaultRolloverStrategy>
                <Delete basePath="${LOG_HOME}" maxDepth="1">
                    <IfFileName glob="*.log.*"/>
                    <IfLastModified age="3d"/>
                    <!--!Note:  there age It has to be with filePattern Coordinate ,
                     The latter is accurate to HH,  This is going to be written as xH, xd It doesn't work , Accurate to mm  The following is the component unit  4320 yes 3 Days of  ,
                     Time needs to ensure that the file is not occupied, otherwise it may be deleted ,  The most recent file is still occupied , Result in unsuccessful deletion !-->
                </Delete>
            </DefaultRolloverStrategy>

        </RollingRandomAccessFile>

    </Appenders>

    <Loggers>
        <!--  Configure the root node of the log  -->
        <root level="INFO">
            <appender-ref ref="console_out_appender"/>
            <appender-ref ref="info_appender"/>
        </root>

        <!--  Third party logging system , For... Under the specified package class Specify different log levels  -->
        <!--        <logger name="org.springframework.core" level="warn"/>-->
        <!--        <logger name="org.springframework.beans" level="warn"/>-->
        <!--        <logger name="org.springframework.context" level="warn"/>-->
        <!--        <logger name="org.springframework.web" level="warn"/>-->
        <!--        <logger name="org.jboss.netty" level="warn"/>-->
        <!--        <logger name="org.apache.http" level="warn"/>-->

    </Loggers>

</configuration>