How can logging be implemented with different levels in Spring Boot?

In Spring Boot, you can customize the logging level output by using configuration files such as application.properties or application.yml. Here is an example:

1. Set the log level in the application.properties file.

# 设置根日志级别为INFO
logging.level.root=INFO

# 设置com.example包的日志级别为DEBUG
logging.level.com.example=DEBUG

1. Set the logging level in the application.yml file.

logging:
  level:
    root: INFO
    com.example: DEBUG

In the example above, the root log level is set to INFO, which means only INFO and higher level log information will be displayed. The log level for the com.example package is set to DEBUG, indicating that DEBUG and higher level log information will be displayed.

With the above configuration, it is possible to manage the output control of logs based on their severity levels. Spring Boot defaults to using Logback as the logging framework, which can be configured accordingly as needed.