Log4j不同等级输入不同文件

主要是利用Threshold.

Threshold的语法

log4j.threshold=level

level就是前面所说的 OFF ,FATAL ,ERROR ,WARN ,INFO ,DEBUG ,ALL。Threshold是个全局的过滤器，它将把低于所设置的level的信息过滤不显示出来。看一个例子：

log4j.rootLogger=DEBUG, CONlog4j.appender.CON=org.apache.log4j.ConsoleAppenderlog4j.appender.CON.layout=org.apache.log4j.PatternLayoutlog4j.appender.CON.layout.ConversionPattern=[%t] %-5p %c - %m%n#Only print log statement of level WARN or above regardless of the（只打印warn级别以上的信息）#logger.log4j.threshold=WARN

Threshold的用法很灵活，还可以在appender中增加threshold

log4j.rootLogger=DEBUG, Clog4j.appender.C=org.apache.log4j.ConsoleAppender# Set the appender threshold to INFOlog4j.appender.C.Threshold=INFOlog4j.appender.C.layout=org.apache.log4j.PatternLayoutlog4j.appender.C.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

这里初始设置 level为DEBUG ，但log4j.appender.C.Threshold=INFO 设置为INFO。因为 INFO>DEBUG 所以如果含有DEBUG级别的信息，将被过滤。

 

 

log4j.rootLogger=debug, stdout, R log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=[%d] [%4p] %l %m%n log4j.appender.R=org.apache.log4j.RollingFileAppender log4j.appender.R.Encoding=GBK log4j.appender.R.Threshold=info log4j.appender.R.File=cohl_elearning.log #..//oil//applications//cohlElearning//cohlElearning// log4j.appender.R.MaxFileSize= 2048KB log4j.appender.R.MaxBackupIndex=20 log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=[%d] [%t] [%4p] %l %m%n

 

 

java代码

 

public class TestJava { static Logger logger = Logger.getLogger(TestJava.class); /** * @param args */ public static void main(String[] args) { loggerTest(); } public static void loggerTest() { logger.info("logger info"); logger.debug("logger debug"); logger.error("logger error"); } }