[英]Log4J 1.2 PropertyConfigurator -> Log4J2
Currently, our application uses Log4J 1.2 and configures it using either目前,我们的应用程序使用 Log4J 1.2 并使用以下任一方式对其进行配置
File file = ...
PropertyConfigurator.configure(file.getAbsolutePath());
or或
URL url = ...
PropertyConfigurator.configure(url);
I know that the property file format has changed from 1.2 to 2, but what would be a similar way to configure Log4J 2 using a property file at an arbitrary file or URL?我知道属性文件格式已从 1.2 更改为 2,但是使用任意文件或 URL 中的属性文件配置 Log4J 2 的类似方法是什么?
From Log4J 2's documentation :来自Log4J 2 的文档:
// import org.apache.logging.log4j.core.LoggerContext;
LoggerContext context = (org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false);
File file = new File("path/to/a/different/log4j2.xml");
// this will force a reconfiguration
context.setConfigLocation(file.toURI());
Make sure to refer to org.apache.logging.log4j.core.LoggerContext
(defined in the log4j-core
artifact, not the log4j-api
one) and not to org.apache.logging.log4j.spi.LoggerContext
.确保参考
org.apache.logging.log4j.core.LoggerContext
(在log4j-core
工件中定义,而不是log4j-api
)而不是org.apache.logging.log4j.spi.LoggerContext
。
You can use PropertiesConfigurationBuilder
as follows:您可以按如下方式使用
PropertiesConfigurationBuilder
:
// Custom-loaded properties.
Properties props = ...
// Beware it should be org.apache.logging.log4j.core.LoggerContext class,
// not the one ins spi package!
// Not sure about the meaning of "false".
LoggerContext context = (LoggerContext)LogManager.getContext(false);
Configuration config = new PropertiesConfigurationBuilder()
.setConfigurationSource(ConfigurationSource.NULL_SOURCE)
.setRootProperties(props)
.setLoggerContext(context)
.build();
context.setConfiguration(config);
Configurator.initialize(config);
It's true that using the core
classes looks like a hack but the author himself uses them in his tutotrial: https://logging.apache.org/log4j/log4j-2.3/manual/customconfig.html .确实,使用
core
类看起来像一个黑客,但作者本人在他的教程中使用了它们: https ://logging.apache.org/log4j/log4j-2.3/manual/customconfig.html。
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