java.util.logging.Logger 使用例程

import java.io.IOException;import java.util.logging.FileHandler;import java.util.logging.Logger;public class Log {public static void main(String[] args) {Logger logger = Logger.getLogger("handlerDemo");try {FileHandler fileHandler = new FileHandler("myLogger.log");fileHandler.setFormatter(new LogFormatter());logger.addHandler(fileHandler);logger.info("11");} catch (SecurityException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}

自定义消息格式化类：

import java.util.logging.Formatter;import java.util.logging.LogRecord;public class LogFormatter extends Formatter {@Overridepublic String format(LogRecord logRecord) {return logRecord.getMessage() + System.getProperty("line.separator");}}