📝 Logging in Spring Boot

Logging is how your application writes messages during its execution — errors, info, debug messages, etc.
It helps developers track what’s happening inside the app and troubleshoot problems.

🔧 Logging in Spring Boot (Default)

Spring Boot uses SLF4J with Logback by default. You don’t need to add any extra dependency.

✍️ How to Write Logs?

In your Java class:

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MyService {
    private static final Logger logger = LoggerFactory.getLogger(MyService.class);

    public void process() {
        logger.info("Process started");
        logger.debug("Debugging info");
        logger.error("Something went wrong!");
    }
}

⚙️ Configure Log Levels

You can set log levels in application.properties: