The following config works fine:

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>(%file)</pattern>
</encoder>
</appender>

If I use property to define pattern, so it isn't work:

<property name="PATTERN" value="(%file)" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>${PATTERN}</pattern>
</encoder>
</appender>

I must use "
)" instead ")", then following config work fine:

<property name="PATTERN" value="\\(%file
)" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>${PATTERN}</pattern>
</encoder>
</appender>