Logback:如何仅将错误记录到文件 [英] Logback: how to log only errors to file

问题描述

我已经阅读了两个小时的注销手册，但仍然不知道该怎么做.

I've been reading the logback manual for 2 hours and still can't figure how to do what I need.

这就像标题所说的一样简单:我只想将错误记录到文件中，而其他级别(包括ERROR)要记录到控制台.

It is as simple as the title says: I want to log only the errors to a file, and the other levels (including ERROR) to console.

这是我的logcat.xml文件的根部分:

This is the root section of my logcat.xml file:

    <root level="TRACE" >
        <appender-ref ref="CONSOLE_APPENDER" />
        <appender-ref ref="FILE_APPENDER" />
    </root>

此配置的问题在于，它将每个级别> = TRACE都记录到两个附加程序中.

The problem with this configuration is that it logs every level >= TRACE to both appenders.

我可以只使用控制台作为根目录，并定义一个文件记录器:

I could let the root with only console, and define a file logger:

    <logger name='file_logger' level='ERROR' >
        <appender-ref ref="FILE_APPENDER" />
    </logger>

但是然后我必须像这样调用普通的记录器:

But then I'd have to call the normal logger like this:

LoggerFactory.getLogger(ClientClass.class);

文件记录器是这样的:

LoggerFactory.getLogger("file_logger");

我不想为每个班级选择记录仪.我只想使用类作为参数从工厂获取根记录程序，并根据级别进行正确的操作.

I don't wan't to choose the logger for each class. I just want to get the root logger from the factory using the class as parameter, and have it do the correct thing depending on the level.

这可能吗?

推荐答案

将其放入文件追加程序定义中:

Put this into your file appender definition:

    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>ERROR</level>
    </filter>

ThresholdFilter在logback-classic.jar中.

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