Java Logger - 配置更改未反映在运行时

Question

我有 2 个用于日志记录的配置文件， config1.properties 和 config2.properties

当我加载 config1.properties 并记录一些东西时，格式是正确的，但是当我加载第二个配置文件时，没有反映所做的更改。这是我的代码：

System.setProperty("java.util.logging.config.file", "config1.properties");
logger = Logger.getLogger(this.getClass().getSimpleName());
logger.info("Message 1");
System.setProperty("java.util.logging.config.file", "config2.properties");
LogManager logManager = LogManager.getLogManager();
logManager.readConfiguration();
logger = Logger.getLogger("NewLogger");
logger.info("Message 2");

我已经在 config2.properties 中设置了 2 行中记录消息的配置，但是消息仍然显示在一行中。

任何想法为什么新配置没有生效？我确信我的配置文件是正确的，因为我尝试在 config1 之前加载 config2，并且在 2 行中显示了我记录的消息。

这是记录的结果：

[01-13-2014 16:48:56:186] LoggerUnitTest INFO: Message 1
[01-13-2014 16:48:56:195] LoggerUnitTest INFO: Message 2

它应该显示为：

[01-13-2014 16:48:56:186] LoggerUnitTest INFO: Message 1
[01-13-2014 16:48:56:195] LoggerUnitTest INFO: 

消息 2

以下是我正在使用的配置文件：

config1.properties

handlers=java.util.logging.ConsoleHandler

.level= FINE

# Limit the message that are printed on the console to INFO and above.
java.util.logging.ConsoleHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
java.util.logging.ConsoleHandler.formatter.format = [%1$tm-%1$td-%1$tY %1$tk:%1$tM:%1$tS:%1$tL] %4$s: %5$s%6$s%n

config2.properties

handlers=java.util.logging.ConsoleHandler

.level= FINE

# Limit the message that are printed on the console to INFO and above.
java.util.logging.ConsoleHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
# Note that this line is different from the line in config1
java.util.logging.ConsoleHandler.formatter.format = [%1$tm-%1$td-%1$tY %1$tk:%1$tM:%1$tS:%1$tL] %n %4$s: %5$s%6$s%n

Answer 1

这对我有用：

Test.java

import java.util.logging.LogManager;
import java.util.logging.Logger;

public class Test {
  public static void main(String[] args) throws Exception {
    System.setProperty("java.util.logging.config.file", "config1.properties");
    Logger logger = Logger.getLogger(Test.class.getSimpleName());
    logger.info("Message 1");
    System.setProperty("java.util.logging.config.file", "config2.properties");
    LogManager logManager = LogManager.getLogManager();
    logManager.readConfiguration();
    logger = Logger.getLogger(Test.class.getSimpleName());
    logger.info("Message 2");
  }
}

config1.properties

handlers=java.util.logging.ConsoleHandler

.level= FINE

# Limit the message that are printed on the console to INFO and above.
java.util.logging.ConsoleHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

config2.properties

handlers=java.util.logging.ConsoleHandler

.level= FINE

# Limit the message that are printed on the console to INFO and above.
java.util.logging.ConsoleHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.XMLFormatter

javac Test.java
java测试

Jan 13, 2014 8:51:20 PM Test main
INFO: Message 1
<?xml version="1.0" encoding="windows-1252" standalone="no"?>
<!DOCTYPE log SYSTEM "logger.dtd">
<log>
<record>
  <date>2014-01-13T20:51:20</date>
  <millis>1389664280170</millis>
  <sequence>1</sequence>
  <logger>Test</logger>
  <level>INFO</level>
  <class>Test</class>
  <method>main</method>
  <thread>10</thread>
  <message>Message 2</message>
</record>

Answer 2

查看Logger.getLogger(String name).documentation的文档

它说

如果创建了一个新的记录器，它的日志级别将基于 LogManager 配置，它将配置为也发送 将输出记录到其父处理程序。它将被注册在 LogManager 全局命名空间。

因此，即使设置了新的配置属性，您的记录器实例也具有旧配置

尝试再次调用以下行来获取新实例

logger = Logger.getLogger("new Name");

您可能需要以不同的方式更改输入参数名称。否则它将返回旧的记录器对象

编辑

这里是我尝试的示例代码

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.Logger;

public class LoggingTest {

    public static void main(String[] args) {
        System.setProperty("java.util.logging.config.file", "config1.properties");
        Logger logger = Logger.getLogger(LoggingTest.class.getSimpleName());
        logger.info("Message 1");
        System.setProperty("java.util.logging.config.file", "config2.properties");
        LogManager logManager = LogManager.getLogManager();
        try {
            logManager.readConfiguration();//logManager.readConfiguration(new FileInputStream(new File("config2.properties")));
        } catch (IOException ex) {
            Logger.getLogger(LoggingTest.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SecurityException ex) {
            Logger.getLogger(LoggingTest.class.getName()).log(Level.SEVERE, null, ex);
        }

        logger = Logger.getLogger("NewLogger");
        logger.info("Message 2");

    }
}