Log4j2 Changes and Implementation

How to use latest Log4j2 changes into your application?

Changing from Log4j-1.x.x version to latest jar Log4j2.17.1

Adding Log4j2 with SLF4J

Add below changes into your pom.xml

    <!-- This is option, It will automatically get added as indirect dependencies -->

    <dependency>

        <groupId>org.slf4j</groupId>

        <artifactId>slf4j-api</artifactId>

        <version>1.7.33</version>

    </dependency>

    <!-- Binding for Log4J -->

    <dependency>

        <groupId>org.apache.logging.log4j</groupId>

        <artifactId>log4j-slf4j-impl</artifactId>

        <version>2.17.1</version>

    </dependency>

   <!-- Log4j2 -->

    <dependency>

        <groupId>org.apache.logging.log4j</groupId>

        <artifactId>log4j-api</artifactId>

        <version>2.17.1</version>

    </dependency>

    <dependency>

        <groupId>org.apache.logging.log4j</groupId>

        <artifactId>log4j-core</artifactId>

        <version>2.17.1</version>

    </dependency>

in log4j2.xml configuration file, for Log4j2 we have to define configuration file. in case of logback it takes default one if do not specify any one.

<?xml version="1.0" encoding="UTF-8"?>

<Configuration status="WARN">

    <Appenders>

        <Console name="LogToConsole" target="SYSTEM_OUT">

            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>

        </Console>

    </Appenders>

    <Loggers>

        <Logger name="com.learnlog" level="debug" additivity="false">

            <AppenderRef ref="LogToConsole"/>

        </Logger>

        <Root level="error">

            <AppenderRef ref="LogToConsole"/>

        </Root>

    </Loggers>

</Configuration>

or else

You can create the log4j2.properties also instead log4j2.xml as below which have both console and file appender.