package log4j;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
public class Log4jG {
// private static Logger log =Logger.getLogger(Log4jG.class);
private static Logger log=LogManager.getLogger(Log4jG.class.getName());
private static Logger log1=LogManager.getLogger("myTest1");
private static Logger log2=LogManager.getLogger("myTest2");
private static Logger log3=LogManager.getLogger("myTest3");
public static void main(String[] args){
// BasicConfigurator.configure();
PropertyConfigurator.configure("c:\\log4j.properties");
log.debug("debug message");
log.info("info message");
log.error("error message");
log1.debug("test1 debug");
log1.info("test1 info message");
log1.error("test1 error message");
log2.debug("test2 debug");
log2.info("test2 info message");
log2.error("test2 error message");
log3.debug("test3 debug");
log3.info("test3 info message");
log3.error("test3 error message");
}
}
log4j.properties
log4j.rootLogger=INFO,A log4j.appender.A=org.apache.log4j.FileAppender log4j.appender.A.file=c:/rootlog.txt log4j.appender.A.layout=org.apache.log4j.PatternLayout log4j.logger.myTest1= DEBUG, test1 log4j.appender.test1=org.apache.log4j.FileAppender log4j.appender.test1.File=c:/test1.log log4j.appender.test1.layout=org.apache.log4j.PatternLayout log4j.appender.test1.layout.ConversionPattern=%d %p [%c] - %m%n log4j.logger.myTest2= DEBUG, test2 log4j.appender.test2=org.apache.log4j.FileAppender log4j.appender.test2.File=c:/test2.log log4j.appender.test2.layout=org.apache.log4j.PatternLayout log4j.appender.test2.layout.ConversionPattern=%d %p [%c] - %m%n log4j.logger.myTest3= DEBUG, R log4j.appender.R=org.apache.log4j.RollingFileAppender log4j.appender.R.File= C:/rolling.log # Control the maximum log file size log4j.appender.R.MaxFileSize=2KB # Archive log files (one backup file here) log4j.appender.R.MaxBackupIndex=1 log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
log4j1.2.17：http://logging.apache.org/log4j/1.2/download.html
log4j1.2.17 API：http://logging.apache.org/log4j/1.2/apidocs/