log4j2自定义日志级别，日志文件单独存储

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本文介绍了如何在Log4j2中定义自定义日志级别并实现日志文件的单独存储，包括配置文件的详细设置和使用方法。

一、自定义日志级别

1、定义日志级别

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class CustomLogUtils {
    //定义公共处理类
    public Logger logger = LogManager.getLogger(this.getClass());
    //定义业务操作日志级别(级别越高，数字越小) off 0, fatal 100, error 200, warn 300, info 400, debug 500
    public static final Level ACTION_LEVEL = Level.forName("ACTION", 350);
    public static final Level VISIT_LEVEL = Level.forName("VISIT", 360);
}

2、使用

public class TestService extends CustomLogUtils{

    public void test(){
        logger.log(CustomLogUtils.ACTION_LEVEL, "操作级别日志内容");
        logger.log(CustomLogUtils.ACTION_LEVEL, "操作级别日志内容打印参数{}，{}","参数1","参数2");
        logger.log(CustomLogUtils.VISIT_LEVEL, "访问级别日志内容");
        logger.log(CustomLogUtils.VISIT_LEVEL, "访问级别日志内容打印参数{}，{}","参数1","参数2");
    }

}

二、日志文件单独存储

log4j2.xml配置

<Configuration status="info">
    <CustomLevels>
<-- off 0, fatal 100, error 200, warn 300, info 400, debug 500-->
        <CustomLevel name="ACTION" intLevel="360"/>
        <CustomLevel name="VISIT" intLevel="350"/>
    </CustomLevels>
......


<Appenders>
        <RollingFile name="RollingFileAction" fileName="logs/action-${sys:lo4j2.filename}.log"
                     filePattern="logs/action-${sys:lo4j2.filename}-%d{MM-dd-yy}-%i.log.gz">
            <Filters>
                <!--VISIT的级别（intLevle小于等于visit）拒绝-->
                <ThresholdFilter level="VISIT" onMatch="DENY" onMisMatch="NEUTRAL"/>
                <!--ACTION级别的输出-->
                <ThresholdFilter level="ACTION" onMatch="NEUTRAL" onMisMatch="DENY"/>
            </Filters>
            <PatternLayout>
                <pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n</pattern>
            </PatternLayout>
            <Policies>
                <OnStartupTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10MB"/>
            </Policies>
        </RollingFile>
        <RollingFile name="RollingFileVisit" fileName="logs/action-${sys:lo4j2.filename}.log"
                     filePattern="logs/action-${sys:lo4j2.filename}-%d{MM-dd-yy}-%i.log.gz">
            <Filters>
                <!--低于WARN的级别（intLevle大于等于warn）不输出-->
                <ThresholdFilter level="WARN" onMatch="DENY" onMisMatch="NEUTRAL"/>
                <!--VISIT级别的输出-->
                <ThresholdFilter level="VISIT" onMatch="NEUTRAL" onMisMatch="DENY"/>
            </Filters>
            <PatternLayout>
                <pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n</pattern>
            </PatternLayout>
            <Policies>
                <OnStartupTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10MB"/>
            </Policies>
        </RollingFile>

......