26.3 File output
By default, Spring Boot will only log to the console and will not write log files. If you want to write log files in addition to the console output you need to set a logging.file or logging.path property (for example in your application.properties).
The following table shows how the logging.* properties can be used together:
Table 26.1. Logging properties
logging.file |
logging.path |
Example | Description |
|---|---|---|---|
| (none) | (none) | Console only logging. | |
| Specific file | (none) | my.log |
Writes to the specified log file. Names can be an exact location or relative to the current directory. |
| (none) | Specific directory | /var/log |
Writes spring.log to the specified directory. Names can be an exact location or relative to the current directory. |
Log files will rotate when they reach 10 Mb and as with console output, ERROR, WARN and INFO level messages are logged by default.
![[Note]](Spring Boot Reference Guide_files/note.png) |
Note |
|---|---|
The logging system is initialized early in the application lifecycle and as such logging properties will not be found in property files loaded via @PropertySource annotations. |
![[Tip]](Spring Boot Reference Guide_files/tip.png) |
Tip |
|---|---|
Logging properties are independent of the actual logging infrastructure. As a result, specific configuration keys (such as logback.configurationFile for Logback) are not managed by spring Boot. |