Java之Logger日志（Java8特性）

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 import java.util.logging.Level;

 import java.util.logging.Logger;

 public class LoggingDemo {

     public static final Logger logger = Logger.getLogger("LoggingDemo.class");

     public static void main(String args[]) {

         Level level = Level.parse("FINEST");

         logger.info(level.toString());

         //下面的消息将被输出

         logger.setLevel(level);

         logger.info("this is an info");

         logger.warning("this is a warn");

         logger.severe("this is a severe");

 //        logger.config("config");

 //        logger.fine("fine");

 //        logger.finer("finer");

 //        logger.finest("finest");

         logger.info("LoggerName: " + logger.getName());

         logger.info("LoggerLevelName: " + logger.getLevel().getName());

     }

 }

运行结果：

五月 23, 2018 5:13:24 下午 org.study2.java8.logging.LoggingDemo main

信息: FINEST

五月 23, 2018 5:13:24 下午 org.study2.java8.logging.LoggingDemo main

信息: this is an info

五月 23, 2018 5:13:24 下午 org.study2.java8.logging.LoggingDemo main

警告: this is a warn

五月 23, 2018 5:13:24 下午 org.study2.java8.logging.LoggingDemo main

严重: this is a severe

五月 23, 2018 5:13:24 下午 org.study2.java8.logging.LoggingDemo main

信息: LoggerName: LoggingDemo.class

五月 23, 2018 5:13:24 下午 org.study2.java8.logging.LoggingDemo main

信息: LoggerLevelName: FINEST