logback %logger{56}, 这56代表什么？

Question

<?xml version="1.0" encoding="UTF-8"?> <configuration> <property name="LOG_HOME" value="e:/log"/> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <!-- encoders are assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder by default --> <encoder> <pattern>【%-5level】 %d{YYYY-MM-DD HH:mm:ss.SSS} [%thread] %logger{36} - %msg%n</pattern> </encoder> </appender> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> 　 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 　　 <fileNamePattern>LOG_HOME/logFile.%d{yyyy-MM-dd}.%i.log</fileNamePattern> 　　　 <maxHistory>30</maxHistory> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <!-- or whenever the file size reaches 64 MB --> <maxFileSize>4 KB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> </rollingPolicy> 　　　 <encoder> 　　　 <pattern>【%-5level】 %d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %logger{56} - %msg%n</pattern> <charset>UTF-8</charset> 　　　 </encoder> 　 </appender> <root level="debug"> <appender-ref ref="FILE" /> </root> </configuration>请输入代码