Apache CommonLogging + Log4J

            package cn.byref.demo.logging;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class CommonLoggingTest {
    public static void main(String[] args) {
        
        Log logger = LogFactory.getLog(CommonLoggingTest.class);
//        Logger logger = Logger.getLogger(CommonLoggingTest.class);
//        log.info("load test");
        logger.debug("CommonLoggingTest log");
    }
}
        

            # An example log4j configuration file that outputs to System.out.  The
# output information consists of relative time, log level, thread
# name, logger name, nested diagnostic context and the message in that
# order.

# For the general syntax of property based configuration files see the
# documenation of org.apache.log4j.PropertyConfigurator.

log4j.rootLogger=DEBUG,B1,A2
log3j.logger.cn.byref.demo.logging.CommonLoggingTest = DEBUG, B1

# A1 is set to be a ConsoleAppender which outputs to System.out. 
log4j.appender.B1=org.apache.log4j.ConsoleAppender

# A1 uses PatternLayout.
log4j.appender.B1.layout=org.apache.log4j.PatternLayout

# The conversion pattern uses format specifiers. You might want to
# change the pattern an watch the output format change.
log4j.appender.B1.layout.ConversionPattern=%-4r %-5p [%t] %37c %3x - %m%n

# In this example, we are not really interested in INNER loop or SWAP
# messages. See the effects of uncommenting and changing the levels of
# the following loggers.
# log4j.logger.org.apache.log4j.examples.SortAlgo.INNER=WARN
# log4j.logger.org.apache.log4j.examples.SortAlgo.SWAP=WARN

# Appender A2 writes to the file "test".
log4j.appender.A2=org.apache.log4j.FileAppender
log4j.appender.A2.File=test.log

# Truncate ‘test‘ if it aleady exists.
log4j.appender.A2.Append=true

# Appender A2 uses the PatternLayout.
log4j.appender.A2.layout=org.apache.log4j.PatternLayout
log4j.appender.A2.layout.ConversionPattern=%-5r %-5p [%t] %c{2} - %m%n