С Log4J Java - Простой пример Log4J
package com.devdaily.log4jdemo;
import org.apache.log4j.Category;
import org.apache.log4j.PropertyConfigurator;
import java.util.Properties;
import java.io.FileInputStream;
import java.io.IOException;
/**
* A simple Java Log4j example class.
* @author alvin alexander, devdaily.com
*/
public class Log4JExample
{
// our log4j category reference
static final Category log = Category.getInstance(Log4JDemo.class);
static final String LOG_PROPERTIES_FILE = "lib/Log4J.properties";
public static void main(String[] args)
{
// call our constructor
new Log4JExample();
// Log4J is now loaded; try it
log.info("leaving the main method of Log4JDemo");
}
public Log4JExample()
{
initializeLogger();
log.info( "Log4JExample - leaving the constructor ..." );
}
private void initializeLogger()
{
Properties logProperties = new Properties();
try
{
// load our log4j properties / configuration file
logProperties.load(new FileInputStream(LOG_PROPERTIES_FILE));
PropertyConfigurator.configure(logProperties);
log.info("Logging initialized.");
}
catch(IOException e)
{
throw new RuntimeException("Unable to load logging property " +
LOG_PROPERTIES_FILE);
}
}
}