Structured logging is a technique where the log output is written in a well-defined, often machine-readable format. Spring Boot supports structured logging and has support for the following JSON formats out of the box:

February 19, 2026 - Learn how to easily configure the most popular logging solutions in a Spring Boot application.

Spring Boot uses Apache Commons logging for all internal logging. Spring Boots default configurations provides a support for the use of Java Util Logging, Log4j2, and Logback. Using these, we can configure the console logging as well as file

February 19, 2026 - ... Spring Boot uses SLF4J with Logback by default, giving you out-of-the-box logging that you can configure through application.properties or custom XML files to control log levels, formats, and outputs across your application.

July 23, 2025 - Now we simply need to run the ... we do not provide any specific configuration for it. This is because spring boot uses Logback for its default logging....

Structured logging is a technique where the log output is written in a well-defined, often machine-readable format. This format can be fed into log management systems and enables powerful search and analytics capabilities.

December 2, 2024 - Spring Boot integrates logging frameworks like Logback and Log4j2 by acting as an intermediary that configures and orchestrates these systems seamlessly during application startup.

Spring Boot uses Commons Logging for all internal logging but leaves the underlying log implementation open. Default configurations are provided for Java Util Logging, Log4J2, and Logback.

June 19, 2025 - However, the AWS SDK for Java uses Apache Commons Logging (JCL). Spring-boot-starter-logging includes the necessary bridges to ensure those logs are delegated to our logging framework out of the box.

September 28, 2022 - The only required dependency for logging using Spring Boot is Apache Commons Logging. When using Spring Boot 2.x, the spring-boot-starter-logging starter pulls in the spring-jcl module, which contains the Apache Commons Logging provider.

November 21, 2024 - By default, Spring boot uses Logback as the logging provider.

April 3, 2024 - This article will demonstrate Spring Boot Logging using the Logback SLF4J implementation.

July 29, 2022 - Introduction to SLF4J , loggers , log levels and formatting logs in Spring Boot

August 30, 2024 - When the classpath contains one of the following files, Spring Boot will automatically load it and apply it over the default configuration: ... To set up logging in a Spring Boot application, you can make use of the application.properties file.

January 23, 2026 - A practical guide to Spring Boot logging - Logback, Log4j2, JSON logs, and runtime log level tweaks. Learn to configure Logback, enable structured JSON logs, manage log levels at runtime, and aggregate logs for observability.

August 24, 2020 - Spring recommends using logback-spring.xml or logback-spring.groovy because they are more powerful. The default configuration is comprised of an appender element inside a root configuration tag. The pattern is specified inside an encoder element : <configuration > <include resource="/org/springframework/boot/logging/logback/base.xml" /> <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> </configuration>

July 18, 2020 - For public APIs that are exposed to application programmers, Spring Boot uses SLF4J (Simple Logging Façade for Java) which allows programmers to choose different logging frameworks.Currently, Spring Boot comes with libraries for Java Util Logging (JUL), Log4J2 and Logback.

December 22, 2025 - <?xml version="1.0" encoding="UTF-8"?> <configuration scan="true" scanPeriod="30 seconds"> <!-- Properties --> <property name="LOG_PATH" value="${LOG_PATH:-logs}"/> <property name="APP_NAME" value="${APP_NAME:-myapp}"/> <!-- Console Appender --> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight(%-5level) [%thread] %cyan(%logger{36}) - %msg%n</pattern> </encoder> </appender> <!-- File Appender with Rolling --> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${LOG_PATH}/${APP_NAME}.

January 26, 2025 - NOTE: Spring generally recommend to use -spring suffix for your logging configuration. ... . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.4.1) 2025-01-26T16:14:29.661+05:30 INFO 7765 --- [Structured Logging] [Logging] [ restartedMain] c.p.s.StructuredLoggingApplication : Starting StructuredLoggingApplication using Java 21.0.3 with PID 7765 2025-01-26T16:14:29.662+05:30 INFO 7765 --- [Structured Logging] [Logging] [ restartedMain] c.p.s.StructuredLoggingApplication : No active profile set, falling back to 1 default profile: "default" 2025-01-26T16:14:29.679+05:30 INFO 7765 --- [Structured Logging] [Logging] [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active!

October 27, 2022 - We now have a working controller to add our logging statements to. With our base setup done, let’s get to the heart of the article: adding logging. Spring Boot comes with a preconfigured default logger based on the Logback framework.