日志记录了解java记录器几乎相同代码的不同输出

Question

第一段代码所做的工作与第二段几乎完全相同。但日志记录的层次传播是不同的。有人能解释一下为什么会这样吗。谢谢

Logger log1 = Logger.getLogger("Test1");
        Logger log2 = Logger.getLogger("Test1.Test2");
        Logger log3 = Logger.getLogger("Test1.Test2.Test3");
        log2.setLevel(Level.WARNING);
        log3.setLevel(Level.INFO);
        log2.addHandler(new ConsoleHandler());
        log3.addHandler(new ConsoleHandler());
        log1.log(Level.INFO, "Message By: {0}",log1.getName());
        log2.log(Level.INFO, "Message By: {0}",log2.getName());
        log3.log(Level.INFO, "Message By: {0}",log3.getName());

OUTPUT: Nov 27, 2014 8:32:51 PM Test main
INFO: Message By: Test1
Nov 27, 2014 8:32:51 PM Test main
INFO: Message By: Test1.Test2.Test3
Nov 27, 2014 8:32:51 PM Test main
INFO: Message By: Test1.Test2.Test3
Nov 27, 2014 8:32:51 PM Test main
INFO: Message By: Test1.Test2.Test3

---

Logger logger      = Logger.getLogger("d");
        Logger logger1     = Logger.getLogger("d.1");
        Logger logger1_2   = Logger.getLogger("d.1.2");
        logger1  .setLevel(Level.WARNING);
        logger1_2.setLevel(Level.INFO);
        logger     .info("msg:");
        logger1    .info("msg: 1");
        logger1_2  .info("msg: 1.2");
OUTPUT:
Nov 27, 2014 8:33:34 PM Test main
INFO: msg:
Nov 27, 2014 8:33:34 PM Test main
INFO: msg: 1.2

Answer 1

The lowest logger INFO message should not have propagated to the top as the middle one is set to Warning

这种假设是你困惑的根源。记录属性在java.util.logging.Logger类文档中定义。根据文件：

By default, loggers also publish to their parent's Handlers, recursively up the tree.

子记录器直接记录到父处理程序，而不是父记录器。因此，在本例中，父处理程序的级别是要播放的，而不是父记录器的级别