#4 Spring Framework Log4j, Slf4j -> Log4j2 전환

1. Log4j, Slf4j -> Log4j2 전환

pom.xml -> Log4j, Sfl4j2 제거, Log4j2 추가
※Log4j2는 Log4j의 최신 버전으로 개선된 성능과 기능을 제공하며, SLF4J와의 통합을 지원합니다.

<!-- properties 부분-->
<properties>
    <org.slf4j2-version>2.0.7</org.slf4j-version>
</properties>

<!-- dependencies 부분 -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>${org.slf4j-version}</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>jcl-over-slf4j</artifactId>
    <version>${org.slf4j-version}</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>${org.slf4j-version}</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.15</version>
    <exclusions>
        <exclusion>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
        </exclusion>
        <exclusion>
            <groupId>javax.jms</groupId>
            <artifactId>jms</artifactId>
        </exclusion>
        <exclusion>
            <groupId>com.sun.jdmk</groupId>
            <artifactId>jmxtools</artifactId>
        </exclusion>
        <exclusion>
            <groupId>com.sun.jmx</groupId>
            <artifactId>jmxri</artifactId>
        </exclusion>
    </exclusions>
    <scope>runtime</scope>
</dependency>

<!-- properties 부분-->
<properties>
    <org.log4j2-version>2.20.0</org.log4j2-version>
</properties>

<!-- dependencies 부분 -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>${org.log4j2-version}</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>${org.log4j2-version}</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>${org.log4j2-version}</version>
    <scope>test</scope>
</dependency>

src/main/resources -> log4j.xml -> lo4gj2.xml 변경

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

<configuration status="INFO">

    <Appenders>
        <!-- 콜솔 -->
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{hh:mm:ss} %5p [%c] %m%n"/>
        </Console>
    </Appenders>

    <loggers>
        <logger name="org.springframework" level="INFO" additivity="false">
            <appender-ref ref="console" />
        </logger>

        <logger name="kr.co.springlegacy" level="INFO" additivity="false">
            <appender-ref ref="console" />
        </logger>

        <logger name="kr.co.springlegacy.mapper" level="TRACE" additivity="false">
            <appender-ref ref="console" />
        </logger>

        <root level="INFO" additivity="false">
            <AppenderRef ref="console"/>
        </root>

    </loggers>

</configuration>