log4j的使用

1.添加jar包

2.寫個log4j.properties

log4j.rootLogger=info,appender1,appender2

log4j.appender.appender1=org.apache.log4j.ConsoleAppender

log4j.appender.appender2=org.apache.log4j.FileAppender

log4j.appender.appender2.File=C:/logFile.txt

log4j.appender.appender1.layout=org.apache.log4j.TTCCLayout

log4j.appender.appender2.layout=org.apache.log4j.TTCCLayout

3.使用

private static Logger logger=Logger.getLogger(StudentTest.class);

logger.info("添加log") ;