java - 日志输出中的奇怪符号

Question

我开始在日志文件中看到奇怪的输出:

2018-11-14 14:04:21,180 [main] [34mINFO[0;39m com.zaxxer.hikari.HikariDataSource - HikariPool-1 - Shutdown initiated... 2018-11-14 14:04:21,186 [main] [34mINFO[0;39m com.zaxxer.hikari.HikariDataSource - HikariPool-1 - Shutdown completed.`

我不知道 [34m 或 [0;39m> 是什么意思以及为什么它在这里。

我的logback.xml配置:

 <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>server.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>server.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
      <timeBasedFileNamingAndTriggeringPolicy
              class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
        <maxFileSize>50MB</maxFileSize>
      </timeBasedFileNamingAndTriggeringPolicy>
      <maxHistory>30</maxHistory>
    </rollingPolicy>
    <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
      <charset>UTF-8</charset>
      <layout class="ch.qos.logback.classic.PatternLayout">
          <pattern>%d [%thread] (%level) %logger{50} - %msg%n</pattern>
      </layout>
    </encoder>
  </appender>

 <root level="info">
  <appender-ref ref="FILE" />
</root>

Answer 1

这些是为输出着色的转义序列。请参阅ANSI escape codes