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:

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packagecom.open1111;importorg.apache.log4j.Logger;publicclassTest {     privatestaticLogger logger=Logger.getLogger(Test.class); // 获取logger实例        publicstaticvoidmain(String[] args) {        logger.info("普通Info信息");        logger.debug("调试debug信息");        logger.error("报错error信息");        logger.warn("警告warn信息");        logger.fatal("严重错误fatal信息");                logger.error("报错信息", newIllegalArgumentException("非法参数"));            }    }

The first time we performed:

We modified the test code:

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packagecom.open1111;importorg.apache.log4j.Logger;public classTest {    privatestaticLogger logger=Logger.getLogger(Test.class); // 获取logger实例        publicstaticvoid main(String[] args) {        logger.info("普通Info信息22222222222222");        logger.debug("调试debug信息");        logger.error("报错error信息");        logger.warn("警告warn信息");        logger.fatal("严重错误fatal信息");                logger.error("报错信息222222222222222", newIllegalArgumentException("非法参数"));            }    }

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