eXtreme Development

Log4J - configurar

Create a log4j.properties file and put it into the resources folder: For standalone Java app, make sure the log4j.properties file is under the project/classes directory For Java web applications, make sure the log4j.properties file is under the WEB-INF/classes directory log4j.properties:

# Root logger option
log4j.rootLogger=DEBUG, stdout, file

# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

# Redirect log messages to a log file, support file rolling.
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\log4j-application.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
import org.apache.log4j.Logger;

public class HelloExample {
	final static Logger logger = Logger.getLogger(HelloExample.class);
	logger.debug("This is debug : " + parameter);
}

referencias

http://www.mkyong.com/logging/log4j-hello-world-example/



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