Log4j
Différents niveaux de log
| ALL | The ALL has the lowest possible rank and is intended to turn on all logging. |
| DEBUG | The DEBUG Level designates fine-grained informational events that are most useful to debug an application. |
| ERROR | The ERROR level designates error events that might still allow the application to continue running. |
| FATAL | The FATAL level designates very severe error events that will presumably lead the application to abort. |
| INFO | The INFO level designates informational messages that highlight the progress of the application at coarse-grained level. |
| OFF | The OFF has the highest possible rank and is intended to turn off logging. |
| TRACE | The TRACE Level designates finer-grained informational events than the DEBUG |
| WARN | The WARN level designates potentially harmful situations. |