java.util.logging.Logger

public class TestLogger {
	public static void main(String[] args){
		Logger log=Logger.getLogger("haha");
		log.setLevel(Level.INFO);
		Logger log1=Logger.getLogger("haha");
		System.out.println(log==log1);
		Logger log2=Logger.getLogger("haha1");
		ConsoleHandler consoleHandler=new ConsoleHandler();
		consoleHandler.setLevel(Level.ALL);
		log.addHandler(consoleHandler);
		
		try {
			FileHandler fileHandler;
			String pathString=System.getProperty("user.dir");
			System.out.println(pathString);
			fileHandler=new FileHandler(pathString+"\\JZlog.log");
			fileHandler.setLevel(Level.INFO);
		    log.addHandler(fileHandler);	
		} catch (SecurityException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		log.info("aaa");
		log2.info("bbb");
		log2.fine("fine");
	}
}

console output:

true
E:\myjava\JztechServer
一月 15, 2013 10:32:38 上午 testlog.TestLogger main
INFO: aaa
一月 15, 2013 10:32:38 上午 testlog.TestLogger main
INFO: aaa
一月 15, 2013 10:32:38 上午 testlog.TestLogger main
INFO: bbb

JZlog.log:

<?xml version="1.0" encoding="GBK" standalone="no"?>

<!DOCTYPE log SYSTEM "logger.dtd">

<log>

<record>
  
<date>2013-01-15T10:32:38</date>
  
<millis>1358217158312</millis>
  
<sequence>0</sequence>
 
<logger>haha</logger>
  
<level>INFO</level>
 
<class>testlog.TestLogger</class>
  
<method>main</method>
 
<thread>1</thread>
  
<message>aaa</message>

</record>

</log>