Spring Boot Logging: Configuration & Display Guide

In Spring Boot, logging configuration and output can be achieved through the configuration files application.properties or application.yml. Here are some commonly used methods for logging configuration and output.

1. To set the logging level, specify the logger name and the desired level of logging, such as TRACE, DEBUG, INFO, WARN, ERROR, etc.

For example, set the level of the root logger to DEBUG.

logging.level.root=DEBUG

1. To set the format of log output:
   You can configure the log format for console and file output using logging.pattern.console and logging.pattern.file.

For example, set the log format for console output as:

logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n

1. Configure log files:
   You can use logging.file or logging.path to set the path and file name for the log file.

For example, setting the file path for logs:

logging.file=/var/log/myapp.log

1. The console outputs:
   Spring Boot uses Logback as the default logging framework, allowing logs to be directly outputted to the console.
2. Document output:
   By configuring logging.file or logging.path, the logs can be directed to a designated file.

Here are some common Spring Boot logging configurations and output methods that can be customized further based on specific requirements.