Log4j Append property specifies whether to append content

log4j default is to keep the log content appended to the log file;

Here is a property Append default is true;

If we set false to not append directly overwrite the previous content;

Let's test it out:

Log4j.rootlogger=debug, Console, FIEL

#Console

Log4j.appender.console=org.apache.log4j.consoleappender

Log4j.appender.console.layout=org.apache.log4j.ttcclayout

#FIEL

Log4j.appender.FIEL = Org.apache.log4j.FileAppender

Log4j.appender.FIEL.File = C://log.log

Log4j.appender.FIEL.layout = Org.apache.log4j.PatternLayout

Log4j.appender.FIEL.layout.ConversionPattern =%d [%t]%-5p [%c]-%m%n

Log4j.appender.FIEL.Append = False

Changed to Append false.

Test class:

Package com.open1111; import Org.apache.log4j.Logger; Public classTest {Private StaticLogger Logger=logger.getlogger (Test.class);//Get Logger instance          Public Static voidMain (string[] args) {Logger.info ("General Info Info"); Logger.debug ("Debugging Debug Information"); Logger.error ("Error Message"); Logger.warn ("warning warn information"); Logger.fatal ("fatal error fatal information"); Logger.error ("error Message",NewIllegalArgumentException ("Illegal parameters")); }     }

The first time we performed:

We modified the test code:

Package com.open1111; import Org.apache.log4j.Logger; Public classTest {Private StaticLogger Logger=logger.getlogger (Test.class);//Get Logger instance          Public Static voidMain (string[] args) {Logger.info ("General Info Info 22222222222222"); Logger.debug ("Debugging Debug Information"); Logger.error ("Error Message"); Logger.warn ("warning warn information"); Logger.fatal ("fatal error fatal information"); Logger.error ("error message 222222222222222",NewIllegalArgumentException ("Illegal parameters")); }     }

By default Append True

is appended, we append here false

The result is an overlay of the previous

OK This property we understand can use the default true;

Log4j Append property specifies whether to append content