spring boot中預設繼承了logback的日誌配置。

• 配置application.properties

# config logback
logging.config=classpath:logback-spring.xml
logging.path=../webLog/demo-1.0.0
logging.level.root=info

logging.path可以是相對路徑，也可以是絕對路徑
logging.config是logback的配置路徑

• 新增loaback的配置檔案 logback-spring.xml

<configuration scan="true"
 
 scanPeriod="10 seconds">
    <include resource="org/springframework/boot/logging/logback/base.xml" />

    <appender name="INFO_FILE"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${LOG_PATH}/info.log</File>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"
 
>
            <fileNamePattern>${LOG_PATH}/info-%d{yyyyMMdd}.log.%i</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>500MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy
 
>
            <maxHistory>2</maxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36}
                -%msg%n
            </Pattern>
        </layout>
    </appender>

    <appender name="ERROR_FILE"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <File>${LOG_PATH}/error.log</File>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_PATH}/error-%d{yyyyMMdd}.log.%i
            </fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>500MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <maxHistory>2</maxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36}
                -%msg%n

            </Pattern>
        </layout>
    </appender>

    <!-- hibernate日誌輸入 -->
    <!-- <logger name="org.hibernate.type.descriptor.sql.BasicBinder" level="TRACE" 
        /> <logger name="org.hibernate.type.descriptor.sql.BasicExtractor" level="TRACE" 
        /> <logger name="org.hibernate.SQL" level="INFO" /> <logger name="org.hibernate.engine.QueryParameters" 
        level="INFO" /> <logger name="org.hibernate.engine.query.HQLQueryPlan" level="INFO" 
        /> -->

    <root level="INFO">
        <appender-ref ref="INFO_FILE" />
        <appender-ref ref="ERROR_FILE" />
    </root>

</configuration>

logback的配置檔案請自行百度。
這樣在具體的class中使用
private Logger logger = LoggerFactory.getLogger(getClass());
就可以打印出日誌啦。