How to Develop Log4j for logging configuration and implementation in spring boot project/Application.

Introduction
Log4j is designed for both beginners and professionals. Our blogs post provides all the basic and advanced concepts of Log4j, such as Log4j for logging configuration and implementation etc. Log4j is a fast, reliable and flexible logging framework which is written in java. It is an open-source logging API for java. Simply the logging means some way to indicate the state of the system at runtime. Logs are used to capture and persists the important data and make it available for analysis at any point in time. Log4j2 is broken up in an API and an implementation (core), where the API provides the interface that applications should code to. Strictly speaking Log4j core is only needed at runtime and not at compile time. However, below we list Log4j as a compile time dependency to improve the startup time for custom plugins as it provides an annotation processor that generates a metadata file to cache plugin information as well as the necessary code to compile against to create custom plugins. . 

Using Log4j in your Apache Maven build To build with Apache Maven, add the dependencies listed below to your pom.xml file.

<dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.17.2</version><!--$NO-MVN-MAN-VER$ --> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.17.2</version><!--$NO-MVN-MAN-VER$ --> </dependency>

To keep your Log4j module versions in sync with each other, a pom.xml file is provided for your convenience. To use this with Maven, add the dependency listed below to your pom.xml file. When you specify the version identifier in this section, you don't have to specify the version in your section. pom.xml

<dependencyManagement> <dependencies> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-bom</artifactId> <version>2.17.2</version> <scope>import</scope> <type>pom</type> </dependency> </dependencies> </dependencyManagement>

Write a configuration of application.properties

########Server Port ###### server.port=8081 #### LOGE FILE BLOCK##### logging.level.org.springframework.web=INFO logging.level.guru.springframework.controllers=DEBUG logging.level.org.hibernate=ERROR logging.file=logs/spring-boot-logging.log

As the file Path is given in the application.properties file, you have to create a folder named logs inside the project with the same name, you can also change its name. you will get to see all this in the video.

Go to The Live Example Video