SpringBoot-- 日志

Posted 2020-10-13 听歌敲代码

一、介绍

　　SpringBoot内部使用Commons Logging来记录日志，但也保留外部接口可以让一些日志框架来进行实现，例如Java Util Logging,Log4J2还有Logback。如果你想用某一种日志框架来进行实现的话，就必须先配置，默认情况下，spring boot使用Logback作为日志实现的框架。

　　${LOG_PATH}, Spring Boot配置文件中logging.path的值 。

　　配置logging.level.*来具体输出哪些包的日志级别。

　　logging.level.root=INFO 
　　logging.level.org.springframework.web=DEBUG 
　　logging.level.org.hibernate=ERROR
　　将日志输出到文件中
　　logging.path=D:\\demo 
　　logging.file=demo.log 
　　logging.level.root=info

二、配置文件，application.properties

    logging.config=classpath:logback.xml
    logging.path=D:/log

三、logback.xml文件内容

<!-- Logback configuration. See http://logback.qos.ch/manual/index.html -->
<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>
    
    <root level="INFO">
        <appender-ref ref="INFO_FILE" />
        <appender-ref ref="ERROR_FILE" />
    </root>
    
    <logger name="org.springframework.boot" level="DEBUG"/>
    
</configuration>