SLF4J ve Log4J2 Backend

Giriş

Açıklaması şöyle. 3 tane bağımlılık lazım

log4j-slf4j-impl.jar – Log4j 2 SLF4J binding. It allows applications coded to the SLF4J API to use Log4j2 as the implementation.

log4j-api.jar – provides the adapter components required for implementers to create a logging implementation.

log4j-core.jar – core Log4j Implementation classes.

Maven

Örnek

Şöyle yaparız

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.15.0</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.15.0</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>2.15.0</version>
</dependency>

Örnek - eski

Şöyle yaparız. 

<!-- Depend on slf4j API -->
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.7.12</version>
</dependency>

<!-- Use log4j as the slf4j implementation during runtime (not test) -->
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.7.12</version>
   <scope>runtime</scope>
</dependency>

Gradle

Örnek

Şöyle yaparız. 

implementation 'org.apache.logging.log4j:log4j-slf4j-impl'
implementation 'org.apache.logging.log4j:log4j-api'
implementation 'org.apache.logging.log4j:log4j-core'