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log4j动态添加appender

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log4j动态添加appender

发表于

2017-06-30 更新于 2021-09-23

阅读次数： 179 Valine： 0

除了通过properties，xml等格式的配置文件对log4j进行配置外，log4j还提供了各种接口，可以用代码动态修改log4j的配置，例如给一个logger增加一个appender。方法很简单，就是新建一个appder，然后添加到logger上，示例代码如下：

KafkaLog4jAppender kafkaAppender = new KafkaLog4jAppender();
kafkaAppender.setBrokerList(broker);
kafkaAppender.setTopic(topic);
kafkaAppender.setCompressionType("gzip");
kafkaAppender.setSyncSend(false);
kafkaAppender.setLayout(new PatternLayout(layout));
kafkaAppender.activateOptions();
logger.addAppender(kafkaAppender);
logger.setLevel(Level.INFO);

这里以一个kafkaappender做例子，其他的，例如DailyRollingFileAppender等，都是类似的。

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