最牛逼 Java 日志框架 — Log4j2，性能无敌，横扫对手.....

logger.debug("Logging in user {} with birthday {}", user.getName(), user.getBirthdayCalendar());

public static Logger logger = LogManager.getFormatterLogger("Foo");
logger.debug("Logging in user %s with birthday %s", user.getName(), user.getBirthdayCalendar());logger.debug("Logging in user %1$s with birthday %2$tm %2$te,%2$tY", user.getName(), user.getBirthdayCalendar());logger.debug("Integer.MAX_VALUE = %,d", Integer.MAX_VALUE);logger.debug("Long.MAX_VALUE = %,d", Long.MAX_VALUE);

logger.printf(Level.INFO, "Logging in user %1$s with birthday %2$tm %2$te,%2$tY", user.getName(), user.getBirthdayCalendar());
logger.debug("Opening connection to {}...", someDataSource);

logger.debug("入参报文：{}",JSON.toJSONString(policyDTO));

if(logger.isDebugEnabled()){    logger.debug("入参报文：{}",JSON.toJSONString(policyDTO));}

void debug(String message, Supplier... paramSuppliers);void info(String message, Supplier... paramSuppliers);void trace(String message, Supplier... paramSuppliers);void error(String message, Supplier... paramSuppliers);

//等同于下面的先判断，后打印logger.debug("入参报文：{}",() -> JSON.toJSONString(policyDTO));

if(logger.isDebugEnabled()){    logger.debug("入参报文：{}",JSON.toJSONString(policyDTO));}

<configuration><appender name = "File" class= "ch.qos.logback.core.rolling.RollingFileAppender">        <file>logs/app.logfile>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <fileNamePattern>logs/archives/app-%d{yyyy-MM-dd}.log.gzfileNamePattern>          <maxFileSize>1 GBmaxFileSize>        rollingPolicy>    appender>    <root level="info">      <appender-ref ref="File"/>    root>configuration>

<Configuration xmlns:xi="http://www.w3.org/2001/XInclude"               status="warn" name="XInclude">    <Appenders>          <RollingFile name="File" fileName="logs/app.log" filePattern="logs/archives/app-%d{yyyy-MM-dd}-%i.log.gz">              <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%t] %-40.40c{1.} : %m%n"/>              <Policies>                  <TimeBasedTriggeringPolicy />                                    <SizeBasedTriggeringPolicy size="1 GB"/>              Policies>          RollingFile>    Appenders>    <Loggers>        <Root level="INFO">            <AppenderRef ref="File"/>        Root>    Loggers>Configuration>

<RollingFile name="File">  <appender name = "File" class= "ch.qos.logback.core.rolling.RollingFileAppender">

<dependency>    <groupId>org.apache.logging.log4jgroupId>    <artifactId>log4j-coreartifactId>    <version>2.14.1version>dependency>

<Configuration xmlns:xi="http://www.w3.org/2001/XInclude"               status="warn" name="XInclude">    <Properties>      <Property name="PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%t] %-40.40c{1.} : %m%n"/>    Properties>    <Appenders>                <Console name="Console" target="SYSTEM_OUT">            <PatternLayout pattern="${PATTERN}"/>          Console>                <RollingFile name="File" fileName="logs/app.log" filePattern="logs/archives/app-%d{yyyy-MM-dd}-%i.log.gz">              <PatternLayout pattern="${PATTERN}"/>              <Policies>                                  <TimeBasedTriggeringPolicy />                                    <SizeBasedTriggeringPolicy size="1 GB"/>              Policies>          RollingFile>    Appenders>    <Loggers>                  <Logger name="your logger/package name" level="debug" additivity="false"/>              <Root level="INFO">                                <AppenderRef ref="Console"/>          <AppenderRef ref="File"/>        Root>    Loggers>Configuration>

;<Configuration>  <Properties>    <Property name="name1">valueproperty>    <Property name="name2" value="value2"/>  Properties>  <filter  ... />  <Appenders>    <appender ... >      <filter  ... />    appender>    ...  Appenders>  <Loggers>    <Logger name="name1">      <filter  ... />    Logger>    ...    <Root level="level">      <AppenderRef ref="name"/>    Root>  Loggers>Configuration>

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

Logger logger = LogManager.getLogger(Log4j2Test.class);logger.error(...);logger.warn(...);logger.info(...);logger.debug(...);logger.trace(...);

-Dlog4j2.contextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector