如何使用log4j抑制来自外部库的日志信息？

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问题描述

我正在使用 log4j2 为项目进行一些记录.我的配置中的登录部分看起来像这样.

<Loggers>

    <!-- default logger -->
    <Root level="info">
        <AppenderRef ref="Console"/>
    </Root>

    <!-- only log warn/error/fatal for external libs -->
    <Logger name="org.cfg4j" level="warn" additivity="false">
        <AppenderRef ref="Console"></AppenderRef>
    </Logger>
    <Logger name="io.netty.util" level="warn" additivity="false">
        <AppenderRef ref="Console"></AppenderRef>
    </Logger>

</Loggers>

这似乎没有任何效果，就从io.netty.util supress supers

提供了任何效果.

我搜索了" io.netty.util记录"，并提出了 this .看起来有一种覆盖默认记录器

的方法

public abstract class InternalLoggerFactory {
private static volatile InternalLoggerFactory defaultFactory;

static {
    final String name = InternalLoggerFactory.class.getName();
    InternalLoggerFactory f;
    try {
        f = new Slf4JLoggerFactory(true);
        f.newInstance(name).debug("Using SLF4J as the default logging framework");
        defaultFactory = f;
    } catch (Throwable t1) {
        try {
            f = new Log4JLoggerFactory();
            f.newInstance(name).debug("Using Log4J as the default logging framework");
        } catch (Throwable t2) {
            f = new JdkLoggerFactory();
            f.newInstance(name).debug("Using java.util.logging as the default logging framework");
        }
    }

    defaultFactory = f;
}

我试图尝试一下，但是遇到了一些问题.首先，我的IDE(Intellij)告诉我，log4jloggerfactory被弃用.我继续进行，但随后发现该实例不包含一种称为" newinstance"的方法.

所以，我对如何进行此操作有些困惑. Log4J有没有办法以我想的方式调试外部库来调试/信息级消息?

推荐答案

如果记录器是在log4j 1.x API中定义的(答案的原始版本):

问题是log4j 1.x api不使用log4j2属性.

添加log4j-1.2-api.jar，作为log4j 1.x桥，它应该解决您的问题.

，但似乎Netty的默认LoggerFactory是Slf4JloggerFactory，因此实际上需要Waht是Slf4J Bridges. slf4j-log4j12至log4j 1.x，log4j-slf4j-impl to log4j2.x.

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问题描述

I am using log4j2 to do some logging for a project. My Loggers section in my config looks like this.

<Loggers>

    <!-- default logger -->
    <Root level="info">
        <AppenderRef ref="Console"/>
    </Root>

    <!-- only log warn/error/fatal for external libs -->
    <Logger name="org.cfg4j" level="warn" additivity="false">
        <AppenderRef ref="Console"></AppenderRef>
    </Logger>
    <Logger name="io.netty.util" level="warn" additivity="false">
        <AppenderRef ref="Console"></AppenderRef>
    </Logger>

</Loggers>

This doesn't seem to be having any effect as far as supressing the DEBUG level messages from io.netty.util

I googled "io.netty.util logging" and came up with this. It looks like there is a way to override the default logger

public abstract class InternalLoggerFactory {
private static volatile InternalLoggerFactory defaultFactory;

static {
    final String name = InternalLoggerFactory.class.getName();
    InternalLoggerFactory f;
    try {
        f = new Slf4JLoggerFactory(true);
        f.newInstance(name).debug("Using SLF4J as the default logging framework");
        defaultFactory = f;
    } catch (Throwable t1) {
        try {
            f = new Log4JLoggerFactory();
            f.newInstance(name).debug("Using Log4J as the default logging framework");
        } catch (Throwable t2) {
            f = new JdkLoggerFactory();
            f.newInstance(name).debug("Using java.util.logging as the default logging framework");
        }
    }

    defaultFactory = f;
}

I tried giving this a go, butI ran into a few issues. For one, my IDE (intellij) told me that Log4JLoggerFactory is deprecated. I proceeded, but then found out that the instance did not contain a method called "newInstance".

So, I'm a little confused on how to proceed with this. Is there a way for log4j to supress external libraries DEBUG/INFO level messages in the way that I am thinking?