<configuration>
 <appender name="STDOUT"
 class="ch.qos.logback.core.ConsoleAppender">
 <encoder>
 <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
 </encoder>
 </appender>
 <appender name="FILE" class="ch.qos.logback.core.FileAppender">
 <file>app.log</file>
 <encoder>
 <pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n </pattern>
 </encoder>
 </appender>
 <logger name="com.apress" level="DEBUG" additivity="false">
 <appender-ref ref="STDOUT" />
 <appender-ref ref="FILE" />
 </logger>
 <root level="INFO">
 <appender-ref ref="STDOUT" />
 <appender-ref ref="FILE" />
 </root>
</configuration>

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter</artifactId>
 <exclusions>
 <exclusion>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-logging</artifactId>
 </exclusion>
 </exclusions>
</dependency>
<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-log4j</artifactId>
</dependency>

Console Output

$ java -jar myapp.jar --debug

File Output

Simple Spring Boot Logging Application

1. Create Spring Boot Project

3. Maven pom.xml File

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>
 <groupId>net.guides.springboot2</groupId>
 <artifactId>springboot2-logging</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>
 <name>springboot2-logging</name>
 <description>Demo project for Spring Boot</description>
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>3.0.4</version>
 <relativePath /> <!-- lookup parent from repository -->
 </parent>
 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 <java.version>17</java.version>
 </properties>
 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency> 
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-test</artifactId>
 <scope>test</scope>
 </dependency> 
 </dependencies>
 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>
</project>

package net.guides.springboot2.springboot2logging;
public class Article {
 private int id;
 private String name;
 
 
 public Article(int id, String name) {
 super();
 this.id = id;
 this.name = name;
 }
 
 public int getId() {
 return id;
 }
 public void setId(int id) {
 this.id = id;
 }
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
}

package net.guides.springboot2.springboot2logging;
import java.util.Arrays;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
@Service
public class ArticleService {
 private static final Logger logger = LoggerFactory.getLogger(ArticleService.class);
 public List<Article> getArticles(){
 logger.debug("inside getArticles() method");
 return Arrays.asList(new Article(100, "article"),new Article(200, "article2"));
 }
}

package net.guides.springboot2.springboot2logging;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ArticleController {
 private static final Logger logger = LoggerFactory.getLogger(ArticleService.class);
 @Autowired
 private ArticleService articleService;
 @GetMapping("/articles")
 public List<Article> getArticles() {
 logger.debug("inside ArticleController.getArticles() method");
 return articleService.getArticles();
 }
}

[{"id":100,"name":"article"},{"id":200,"name":"article2"}]