我正在使用log4j2在控制台和文件中记录消息。我收到了很多我不想要的警告消息。我只想查看Debug和其他消息。可以在允许“调试”,“错误”和任何其他类型的消息的同时抑制“警告”消息吗?
在堆栈溢出时,我已经查看了其他答案,但它们仅说明了抑制功能,该抑制功能会将所有低于该特定消息级别的消息抑制掉。例如,如果我将日志级别更改为“错误”,则将自动禁止“警告调试”和低于此级别的任何其他消息。我不要这种行为。我想抑制“仅警告”消息,同时尽可能允许任何高于此级别的消息。下面是我的Log2j2配置文件。
<Configuration status="error">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="[%d{DEFAULT}][%5p][%t][%c{1}] - %m%n" />
</Console>
<File name="MyFile" fileName="logs/java.log" immediateFlush="false" append="true">
<PatternLayout pattern="[%d{DEFAULT}][%5p][%t][%c{1}] - %m%n"/>
</File>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="Console" />
<AppenderRef ref="MyFile"/>
</Root>
</Loggers>
</Configuration>
答案 0 :(得分:2)
您可以使用LevelRangeFilter拒绝日志事件。
这是一个生成一些日志的简单类:
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class SomeClass {
private static final Logger log = LogManager.getLogger();
public static void main(String[] args){
if(log.isDebugEnabled())
log.debug("This is some debug!");
log.info("Here's some info!");
log.warn("Warning will be rejected.");
log.error("Some error happened!");
}
}
这是将所有事件发送到控制台的基本配置:
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
</Appenders>
<Loggers>
<Root level="ALL">
<AppenderRef ref="Console" />
</Root>
</Loggers>
</Configuration>
上面生成的输出是:
21:08:42.215 [main] DEBUG example.SomeClass - This is some debug!
21:08:42.217 [main] INFO example.SomeClass - Here's some info!
21:08:42.217 [main] WARN example.SomeClass - Warning will be rejected.
21:08:42.217 [main] ERROR example.SomeClass - Some error happened!
现在,我们将LevelRangeFilter添加到控制台附加程序:
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
<LevelRangeFilter minLevel="WARN" maxLevel="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
</Console>
现在的输出是:
21:15:26.987 [main] DEBUG example.SomeClass - This is some debug!
21:15:26.989 [main] INFO example.SomeClass - Here's some info!
21:15:26.989 [main] ERROR example.SomeClass - Some error happened!
您会看到WARN消息未记录到控制台。
答案 1 :(得分:1)
Try threshold filters as follows:
<Configuration status="error">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<Filters>
<!-- Accept error and fatal messages -->
<ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="NEUTRAL"/>
<!-- Reject Warn messages -->
<ThresholdFilter level="warn" onMatch="DENY" onMismatch="NEUTRAL"/>
<!-- This filter accepts debug, trace, info, error, fatal -->
<ThresholdFilter level="trace" onMatch="ACCEPT" onMismatch="DENY"/>
</Filters>
<PatternLayout pattern="[%d{DEFAULT}][%5p][%t][%c{1}] - %m%n" />
</Console>
<File name="MyFile" fileName="logs/java.log" immediateFlush="false" append="true">
<Filters>
<!-- Accept error and fatal messages -->
<ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="NEUTRAL"/>
<!-- Reject Warn messages -->
<ThresholdFilter level="warn" onMatch="DENY" onMismatch="NEUTRAL"/>
<!-- This filter accepts debug, trace, info, error, fatal -->
<ThresholdFilter level="trace" onMatch="ACCEPT" onMismatch="DENY"/>
</Filters>
<PatternLayout pattern="[%d{DEFAULT}][%5p][%t][%c{1}] - %m%n"/>
</File>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="Console" />
<AppenderRef ref="MyFile"/>
</Root>
</Loggers>
</Configuration>