springboot-8- 日志配置

1, logback配置

springboot 默认支持logback, 自动加载classpath:logback-spring.xml

<!-- logback多文件输出 -->
    <property name="log.root.level" value="DEBUG" /> <!-- 日志级别 -->
    <property name="log.other.level" value="DEBUG" /> <!-- 其他日志级别 -->
    <property name="log.moduleName" value="elasticSearch5.2" />  <!-- 模块名称， 影响日志配置名，日志文件名 -->
    <!--日志文件的保存路径,首先查找系统属性-Dlog.dir,如果存在就使用其；否则，在当前目录下创建名为logs目录做日志存放的目录 -->
    <property name="log.base" value="${log.dir:-logs}/${log.moduleName}" />
    <property name="log.max.size" value="100MB" /> <!-- 日志文件大小,超过这个大小将被压缩 -->  

    <!--控制台输出 -->
    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>logback-%date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{}.%method:%L -%msg%n</Pattern>
        </encoder>
    </appender>  

    <!-- 用来保存输出所有级别的日志 -->
    <appender name="file.all" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${log.base}/${log.moduleName}.log</File><!-- 设置日志不超过${log.max.size}时的保存路径，注意如果
            是web项目会保存到Tomcat的bin目录 下 -->
        <!-- 滚动记录文件，先将日志记录到指定文件，当符合某个条件时，将日志记录到其他文件。 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${log.base}/archive/${log.moduleName}_all_%d{yyyy-MM-dd}.%i.log.zip
            </FileNamePattern>
            <!-- 文件输出日志 (文件大小策略进行文件输出，超过指定大小对文件备份) -->
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${log.max.size}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <!-- 日志输出的文件的格式 -->
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%date{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%thread]%logger{}.%method:%L -%msg%n</pattern>
        </layout>
    </appender>  

    <!-- 这也是用来保存输出所有级别的日志 -->
    <appender name="file.all.other" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${log.base}/${log.moduleName}_other.log</File>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${log.base}/archive/${log.moduleName}_other_%d{yyyy-MM-dd}.%i.log.zip
            </FileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${log.max.size}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%date{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] %logger{}.%method:%L -%msg%n</pattern>
        </layout>
    </appender>  

    <!-- 只用保存输出error级别的日志 -->
    <appender name="file.error"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${log.base}/${log.moduleName}_err.log</File>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${log.base}/archive/${log.moduleName}_err_%d{yyyy-MM-dd}.%i.log.zip
            </FileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${log.max.size}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%date{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] %logger{}.%method:%L - %msg%n</pattern>
        </layout>
        <!-- 下面为配置只输出error级别的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>  

   <!-- 不丢失日志.默认的,如果队列的80%已满,则会丢弃TRACT、DEBUG、INFO级别的日志 -->
    <!-- 更改默认的队列的深度,该值会影响性能.默认值为256 -->
    <!-- 添加附加的appender,最多只能添加一个 -->
    <appender name="file.async" class="ch.qos.logback.classic.AsyncAppender">
        <discardingThreshold></discardingThreshold>
        <queueSize></queueSize>
        <includeCallerData>true</includeCallerData>
        <appender-ref ref="file.all" />
    </appender>  

      <!-- 使用异步记录信息 -->
    <appender name="file.async.other" class="ch.qos.logback.classic.AsyncAppender">
        <discardingThreshold></discardingThreshold>
        <queueSize></queueSize>
        <includeCallerData>true</includeCallerData>
        <appender-ref ref="file.all.other" />
    </appender> 

    <!-- 为某个包下的所有类的指定Appender 这里也可以指定类名称例如：com.aa.bb.ClassName -->
    <logger name="com.lin" additivity="false">
        <level value="${log.root.level}" />
        <appender-ref ref="stdout" />
        <appender-ref ref="file.async" /><!-- 即com.lin包下级别为 ${log.root.level}的才会使用file.async来打印 -->
        <appender-ref ref="file.error" />
    </logger>  

    <!-- root将级别为${log.root.level}及大于${log.root.level}的日志信息交给已经配置好的名为“Console”的appender处理，“Console”appender将信息打印到Console,其它同理 -->
    <root level="${log.root.level}">
        <appender-ref ref="stdout" /> <!--  标识这个appender将会添加到这个logger -->
        <appender-ref ref="file.async.other" />
        <appender-ref ref="file.error" />
    </root>  

配置logback.xml的多环境日志出书

<include resource="org/springframework/boot/logging/logback/base.xml" />
    <logger name="org.springframework.web" level="INFO"/>
    <logger name="org.springboot.sample" level="TRACE" />

    <!-- 测试环境+开发环境. 多个使用逗号隔开. -->
     <springProfile name="test,dev">
        <logger name="org.springframework.web" level="INFO"/>
        <logger name="org.springboot.sample" level="INFO" />
        <logger name="com.kfit" level="info" />
    </springProfile>

    <!-- 生产环境. -->
    <springProfile name="prod">
        <logger name="org.springframework.web" level="ERROR"/>
        <logger name="org.springboot.sample" level="ERROR" />
        <logger name="com.kfit" level="ERROR" />
    </springProfile>

2,  log4j2 配置

嗯, 刚刚继承了logback, 又需要换成log4j2

百度了下, log4j2和logback和log4j出自一个人的手, 但log4j2的同步和异步日志记录性能更为优异

2.1) 在maven上引入依赖

<!-- log related -->
    <dependency> <!-- exclude掉spring-boot的默认log配置 -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency> <!-- 引入log4j2依赖 -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-log4j2</artifactId>
    </dependency>
    <dependency>  <!-- 加上这个才能辨认到log4j2.yml文件 -->
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-yaml</artifactId>
    </dependency>
<!-- end of log related -->   

2.2) log4j2.yml, 放置在resources文件夹下即可, springboot可自动读取

Configuration:
  status: warn  

  Properties: # 定义全局变量
    Property: # 缺省配置（用于开发环境）。其他环境需要在VM参数中指定，如下：
      #测试：-Dlog.level.console=warn -Dlog.level.xjj=trace
      #生产：-Dlog.level.console=warn -Dlog.level.xjj=info
      - name: log.level.console
        value: trace
      - name: log.level.xjj
        value: trace
      - name: log.path
        value: /opt/logs
      - name: project.name
        value: my-spring-boot  

  Appenders:
    Console:  #输出到控制台
      name: CONSOLE
      target: SYSTEM_OUT
      ThresholdFilter:
        level: ${sys:log.level.console} # “sys:”表示：如果VM参数中没指定这个变量值，则使用本文件中定义的缺省全局变量值
        onMatch: ACCEPT
        onMismatch: DENY
      PatternLayout:
        pattern: "%d{yyyy-MM-dd HH:mm:ss,SSS}:%4p %t (%F:%L) - %m%n"
    RollingFile: # 输出到文件，超过128MB归档
      - name: ROLLING_FILE
        ignoreExceptions: false
        fileName: ${log.path}/${project.name}.log
        filePattern: "${log.path}/$${date:yyyy-MM}/${project.name}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: "%d{yyyy-MM-dd HH:mm:ss,SSS}:%4p %t (%F:%L) - %m%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: "128 MB"
        DefaultRolloverStrategy:
          max:   

  Loggers:
    Root:
      level: info
      AppenderRef:
        - ref: CONSOLE
        - ref: ROLLING_FILE
    Logger: # 为com.xjj包配置特殊的Log级别，方便调试
      - name: com.xjj
        additivity: false
        level: ${sys:log.level.xjj}
        AppenderRef:
          - ref: CONSOLE
          - ref: ROLLING_FILE  

3, 通过配置level, 既可以实现不同配置的输出了

4, 在项目中使用就可以了

protected final Logger logger = LoggerFactory.getLogger(this.getClass());