Springboot項目中，使用logback來管理日志。

優點：簡單、實用、方便、快捷、可以記錄日志文件到指定路徑.

1.在springboot配置文件application.yml，添加logback配置文件路徑.

logging:
  config: src/main/java/resources/logback-spring.xml

2.logback-spring.xml配置文件內容.

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>


    <!-- 彩色日志配置 -->
    <!-- 彩色日志依賴的渲染類 -->
    <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
    <conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
    <conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" />
    <!-- 彩色日志格式 -->
    <property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){green} %clr([${PID:-}]){magenta} %clr([%25.25t]){yellow} %clr([${LOG_LEVEL_PATTERN:-%5p ]}){red} %clr(%-40.40logger{39}){blue} %clr(:){cyan} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}" />

    <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                <!--%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread]  %-5level %logger{50} - %msg%n-->
                ${CONSOLE_LOG_PATTERN}
            </pattern>
        </layout>
    </appender>

    <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>DENY</onMatch>
            <onMismatch>ACCEPT</onMismatch>
        </filter>
        <encoder>
            <pattern>
                %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread]  %-5level %logger{50} - %msg%n
            </pattern>
        </encoder>
        <!--滾動策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>D:/data_server/mylog/info_%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>


    <appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <encoder>
            <pattern>
                %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread]  %-5level %logger{50} - %msg%n
            </pattern>
        </encoder>
        <!--滾動策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>D:/data_server/mylog/error_%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

    <appender name="fileDebugLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>DEBUG</level>
        </filter>
        <encoder>
            <pattern>
                %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread]  %-5level %logger{50} - %msg%n
            </pattern>
        </encoder>
        <!--滾動策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>D:/data_server/mylog/debug_%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

    <root level="INFO">
        <appender-ref ref="fileInfoLog" />
        <appender-ref ref="fileErrorLog" />
        <appender-ref ref="fileDebugLog" />
        <appender-ref ref="consoleLog" />
    </root>

</configuration>

3.輸出樣式.