SpringBoot构建应用之集成Logback

一 依赖关系的梳理

　　当我们用IDEA简单的构建一个单体的应用时，所依赖的POM中其实已经有集成了logback的依赖；

　　我们可以打开pom.xml

　　

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

　　点击进入spring-boot-starter-parent 里依赖了spring-boot-dependencies

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-dependencies</artifactId>
    <version>2.1.7.RELEASE</version>
    <relativePath>../../spring-boot-dependencies</relativePath>
  </parent>

　　再进入spring-boot-dependencies 里找到spring-boot-starter

　　<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <version>2.1.7.RELEASE</version>
　　</dependency>

　　再进入spring-boot-starter找到spring-boot-starter-logging

 　　<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-logging</artifactId>
      <version>2.1.7.RELEASE</version>
      <scope>compile</scope>
    </dependency>

　　点击进入就能看到有依赖了logback

<dependencies>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.2.3</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-to-slf4j</artifactId>
      <version>2.11.2</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jul-to-slf4j</artifactId>
      <version>1.7.26</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

　二 xml配置

首先，官方推荐使用的xml名字的格式为：logback-spring.xml而不是logback.xml，至于为什么，因为带spring后缀的可以使用<springProfile>这个标签　　

我们在resource的目录下新建一个 logback-spring.xml 内容如下

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

    <springProperty scope="context" name="logLevel" source="logging.pattern.level"/>
    <springProperty scope="context" name="logPath" source="logging.path"/>
    <springProperty scope="context" name="fileName" source="logging.file"/>

    <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                %date [%thread] %-5level %logger{80} - %msg%n
            </pattern>
        </layout>
    </appender>

    <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>DENY</onMatch>
            <onMismatch>ACCEPT</onMismatch>
        </filter>
        <encoder>
            <pattern>
                %date [%thread] %-5level %logger{80} - %msg%n
            </pattern>
        </encoder>
        <!--滚动策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--路径-->
            <fileNamePattern>${logPath}/${fileName}-%d{yyyy-MM-dd}-%i.log</fileNamePattern>
            <maxFileSize>200MB</maxFileSize>
            <maxHistory>60</maxHistory>
        </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>
                %date [%thread] %-5level %logger{80} - %msg%n
            </pattern>
        </encoder>
        <!--滚动策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--路径-->
            <fileNamePattern>${logPath}/${fileName}-%d{yyyy-MM-dd}-error-%i.log</fileNamePattern>
            <maxFileSize>200MB</maxFileSize>
            <maxHistory>60</maxHistory>
        </rollingPolicy>
    </appender>

    <!--此处是针对具体包下面配置日志级别-->
    <!--配置文件中设置的是项目的日志级别-->
    <logger name="com.pyq.blog" level="${logLevel}" />
    <!--自己本地开发想打印sql时打开注释 但切勿提交-->

    <springProfile  name="dev" >
        <!--此处是针对所有包的日志级别-->
        <root level="${logLevel}">
            <appender-ref ref="consoleLog" />
<!--            <appender-ref ref="fileInfoLog" />-->
            <!--<appender-ref ref="fileErrorLog" />-->
        </root>
    </springProfile >

    <springProfile name="test">
        <root level="${logLevel}">
            <!--此处是针对所有包的日志级别-->
            <!--<appender-ref ref="consoleLog" />-->
            <appender-ref ref="fileInfoLog" />
            <appender-ref ref="fileErrorLog" />
        </root>
    </springProfile>

    <springProfile name="prod">
        <root level="${logLevel}">
            <!--此处是针对所有包的日志级别-->
            <!--<appender-ref ref="consoleLog" />-->
            <appender-ref ref="fileInfoLog" />
            <appender-ref ref="fileErrorLog" />
        </root>
    </springProfile>

</configuration>

　　

　　上面的包名自己替换

　　三 yml配置日志

logging:
  path: D:log
  file: ${spring.application.name}
  pattern:
    level: INFO