使用 SLF4J 发送/重定向/路由 java.util.logging.Logger (JUL) 到 Logback？
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Send/redirect/route java.util.logging.Logger (JUL) to Logback using SLF4J?
提问by Zombies
Is it possible to have a typical call to java.util.logging.Loggerand have it route to Logback using SLF4J? This would be nice since I wouldn't have to refactor the old jul code line by line.
是否可以java.util.logging.Logger使用 SLF4J 对 Logback 进行典型调用并将其路由到 Logback？这会很好，因为我不必逐行重构旧的 jul 代码。
EG, say we have this line:
EG，假设我们有这条线：
private static Logger logger = Logger.getLogger(MahClass.class.getName());
//...
logger.info("blah blah blah");
It would be nice to configure this to call through SLF4J.
将此配置为通过 SLF4J 调用会很好。
回答by Dejan Milosevic
It's very easy and not a performance issue anymore.
这很容易，不再是性能问题。
There are two ways documented in the SLF4J manual. There are also precise examples in the Javadocs
SLF4J 手册中记录了两种方法。Javadocs中也有精确的例子
Add jul-to-slf4j.jar to your classpath. Or through maven dependency:
将 jul-to-slf4j.jar 添加到您的类路径中。或者通过 Maven 依赖：
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jul-to-slf4j</artifactId>
<version>1.7.0</version>
</dependency>
If you don't have logging.properties (for java.util.logging), add this to your bootstrap code:
如果您没有 logging.properties（用于 java.util.logging），请将其添加到您的引导程序代码中：
SLF4JBridgeHandler.removeHandlersForRootLogger();
SLF4JBridgeHandler.install();
If you have logging.properties (and want to keep it), add this to it:
如果您有 logging.properties（并想保留它），请将其添加到其中：
handlers = org.slf4j.bridge.SLF4JBridgeHandler
In order to avoid performance penalty, add this contextListener to logback.xml (as of logback version 0.9.25):
为了避免性能损失，将此 contextListener 添加到 logback.xml（从 logback 版本 0.9.25 开始）：
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
<!-- reset all previous level configurations of all j.u.l. loggers -->
<resetJUL>true</resetJUL>
</contextListener>
...
</configuration>
