log4j.rootLogger=INFO, stdout, file log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n log4j.appender.file=org.apache.log4j.RollingFileAppender log4j.appender.file.File=/path/to/logfile.log log4j.appender.file.MaxFileSize=10MB log4j.appender.file.MaxBackupIndex=5 log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=%d %p [%c] - %m%n import org.apache.log4j.Logger; public class MyClass { private static final Logger logger = Logger.getLogger(MyClass.class); public void doSomething() { try { } catch (Exception e) { } } } import org.apache.log4j.Logger; public class MyClass { private static final Logger logger = Logger.getLogger(MyClass.class); public void doSomething() { try { } catch (Exception e) { } } }