Simple Log4j ConfigurationLog4j is a simple logging framework. you can download the latest version of log4j ( Download ). After download finished add jar in class path log4j-x.x.x.jar. Create a new HelloLogger.java file. package com.abc.helloworld;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
public class HelloLogger {
static final Logger logger = Logger.getLogger(HelloLogger.class);
public static void main(String[] args) {
BasicConfigurator.configure();
logger.debug("Hello World!");
}
}
Log4j available methods are info(), warn(), error() and fatal() , logger levels are DEBUG, INFO, WARN, ERROR, FATAL . Following example shows usage of method. package com.abc.helloworld;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
public class HelloLogger {
static final Logger logger = Logger.getLogger(HelloLogger.class);
public static void main(String[] args) {
BasicConfigurator.configure();
logger.debug("debug message");
logger.info("info message");
logger.warn("warn message");
logger.error("error message");
logger.fatal("fatal message");
}
}
Output of the above code.0 [main] DEBUG com.abc.helloworld.HelloLogger - debug message 0 [main] INFO com.abc.helloworld.HelloLogger - info message 0 [main] WARN com.abc.helloworld.HelloLogger - warn message 0 [main] ERROR com.abc.helloworld.HelloLogger - error message 0 [main] FATAL com.abc.helloworld.HelloLogger - fatal message Enjoy log4j in you web application. |
Wednesday, February 29, 2012
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