slf4j + log4j2.x maven配置，slf4jmaven,本文不提 log4j2

slf4j + log4j2.x maven配置，slf4jmaven,本文不提 log4j2

本文不提 log4j2 相比较 log4j 和 logback 有多么出色的性能提升，这里只记录 slf4j + log4j 2 的简单配置。

增加 maven 依赖

<properties>    <slf4j.version>1.7.7</slf4j.version>    <log4j.version>2.1</log4j.version></properties><dependencies>    <dependency>        <groupId>org.slf4j</groupId>        <artifactId>slf4j-api</artifactId>        <version>${slf4j.version}</version>    </dependency>    <dependency>        <groupId>org.apache.logging.log4j</groupId>        <artifactId>log4j-slf4j-impl</artifactId>        <version>${log4j.version}</version>    </dependency>    <dependency>        <groupId>org.apache.logging.log4j</groupId>        <artifactId>log4j-api</artifactId>        <version>${log4j.version}</version>    </dependency>    <dependency>        <groupId>org.apache.logging.log4j</groupId>        <artifactId>log4j-core</artifactId>        <version>${log4j.version}</version>    </dependency></dependencies>

配置 log4j2.xml

log4j 2 相比较 log4j 配置文件完全变了，需要重新配置。下面是一个demo配置，供参考。

<?xml version="1.0" encoding="UTF-8"?><Configuration>    <appenders>        <Console name="Console" target="SYSTEM_OUT">            <PatternLayout pattern="%d %-5p %c{1} - %m%n" />        </Console>        <RollingFile name="DebugRollingFile" fileName="/www/logs/xxx/debug.log"            filePattern="/www/logs/xxx/%d{yyyy-MM}/debug-%d{yyyy-MM-dd}-%i.log">            <PatternLayout>                <Pattern>%d %t %-5p - %m%n</Pattern>            </PatternLayout>            <Policies>                <TimeBasedTriggeringPolicy />                <SizeBasedTriggeringPolicy size="50 MB" />            </Policies>            <DefaultRolloverStrategy max="20"/>        </RollingFile>    </appenders>    <Loggers>        <Root level="debug">            <AppenderRef ref="Console" />            <AppenderRef ref="DebugRollingFile" level="debug" />        </Root>    </Loggers></Configuration>