Log4j configuration and simple use

Log4j is a Java-based open-source log component. log4j has powerful functions. We can output log information to the console, files, and user interfaces, it can also output Event recorders and some system resident processes to the operating system. It is worth mentioning that log4j allows you to easily customize log formats and log levels, and helps developers fully control log information.

Http://logging.apache.org/log4j/2.x/

Package COM. mai. test; import Org. apache. log4j. logger; import Org. apache. log4j. propertyconfigurator; public class log4jtest {public static void main (string [] ARGs) {logger log = logger. getlogger (log4jtest. class); propertyconfigurator. configure ("src/log4j. properties "); log. debug ("Yes, debug"); log.info ("Yes, Info"); log. error ("Yes, error"); log. warn ("Yes, warn ");}}

Log4j configuration and simple use