如何使记录器包裹在slf4j中? [英] How to get the logger wrapped in slf4j?

问题描述

是否有可能使记录器被slf4j包装?

Is it possible to get the logger wrapped by slf4j ?

例如，在调试模式下，当我检查 org.slf4j.LoggerFactory.getLogger(loggerName)时，我可以看到记录器(此处为 java.util.logging ):

For example, in debug mode, when I inspect org.slf4j.LoggerFactory.getLogger(loggerName), I can see the logger (here, java.util.logging) :

我想做类似的事情:

// Get the real logger, cast in java.util.logging
java.util.logging.Logger myLogger = LoggerFactory.getLogger(loggerName))...;
// Use the java.util.logging methods
myLogger.setLevel(Level.parse(level)); 

推荐答案

我找到了使用反射的解决方案.在slf4j Logger中寻找"logger"字段.

I've found a solution using reflection. Looking for the "logger" field in the slf4j Logger.

private <T> T getLogger(final String loggerName, final Class<T> loggerClass) {
    final org.slf4j.Logger logger = LoggerFactory.getLogger(loggerName);
    try {
        final Class<? extends org.slf4j.Logger> loggerIntrospected = logger.getClass();
        final Field fields[] = loggerIntrospected.getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            final String fieldName = fields[i].getName();
            if (fieldName.equals("logger")) {
                fields[i].setAccessible(true);
                return loggerClass.cast(fields[i].get(logger));
            }
        }
    } catch (final Exception e) {
        logger.error(e.getMessage());
    }
    return null;
}

致电:

java.util.logging.Logger myLogger = getLogger(loggerName, java.util.logging.Logger.class)
// or
org.apache.log4j.Logger myLogger = getLogger(loggerName, org.apache.log4j.Logger.class)

但是使用slf4j API可能存在更好的解决方案吗?

But maybe exists a better solution using the slf4j API ?

这篇关于如何使记录器包裹在slf4j中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！