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我有，我已經創建了一個logback.xml配置文件非常簡單的Spring 1.2.2啓動Web應用程序：春天啓動的logback fileappender配置
<configuration debug="true" scan="true" scanPeriod="33 seconds">
<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<!--
<appender name="logfile" class="ch.qos.logback.core.FileAppender">
<file>myapp.log</file>
<append>true</append>
<encoder>
<pattern>%d{HH:mm:ss.SSS %-5level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
</encoder>
</appender>
-->
<logger name="com.myapp.logtest.SampleController" level="DEBUG"/>
<logger name="com.myapp.logtest" level="WARN">
</logger>
<root level="INFO">
<appender-ref ref="console"/>
</root>
</configuration>
一切的偉大工程！這裏是日誌文件的調試輸出：
12:29:16,397 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Setting ReconfigureOnChangeFilter scanning period to 33 seconds
12:29:16,397 |-INFO in ReconfigureOnChangeFilter{invocationCounter=0} - Will scan for changes in [[...\logtest\logback.xml]] every 33 seconds.
12:29:16,397 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Adding ReconfigureOnChangeFilter as a turbo filter
12:29:16,397 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
12:29:16,397 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [console]
12:29:16,407 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
12:29:16,427 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.myapp.logtest.SampleController] to DEBUG
12:29:16,427 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.myapp.logtest] to WARN
12:29:16,427 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
12:29:16,427 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [console] to Logger[ROOT]
12:29:16,427 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
12:29:16,427 |-INFO in [email protected] - Registering current configuration as safe fallback point
現在，這是我的問題。如果我對配置文件中的文件appender進行了UNCOMMENT，即使沒有對其進行參考，我的整個logback配置也會被丟棄，並且我的應用程序會回到使用Spring日誌記錄的默認值。這裏是的logback調試輸出本文件的appender：
12:32:58,308 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Setting ReconfigureOnChangeFilter scanning period to 33 seconds
12:32:58,308 |-INFO in ReconfigureOnChangeFilter{invocationCounter=0} - Will scan for changes in [[...\logtest\logback.xml]] every 33 seconds.
12:32:58,308 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Adding ReconfigureOnChangeFilter as a turbo filter
12:32:58,308 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
12:32:58,308 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [console]
12:32:58,328 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
12:32:58,338 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.FileAppender]
12:32:58,338 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [logfile]
12:32:58,338 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
12:32:58,348 |-WARN in Logger[org.springframework.boot.logging.LoggingApplicationListener] - No appenders present in context [default] for logger [org.springframework.boot.logging.LoggingApplicationListener].
正如你可以看到，該文件的存在本身附加器的logback導致初始化與LoggingApplicationListener警告停止。 Logback實例化文件appender，所以我相信它在logback.xml中正確指定。但是我的logback.xml被忽略，並且日誌記錄回落到Spring默認值。
這個警告是什麼意思？我如何獲得一個logback文件appender來使用Spring啓動？