项目中日志的添加

1、pom.xml 中导入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>

2、创建logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- scan:当此属性设置为true时，配置文件如果发生改变，将会被重新加载，默认值为true -->
<!-- scanPeriod:设置监测配置文件是否有修改的时间间隔，如果没有给出时间单位，默认单位是毫秒。当scan为true时，此属性生效。默认的时间间隔为1分钟。 -->
<configuration  scan="true" scanPeriod="10 seconds" debug="false">
    <contextName>logback</contextName>
    <!-- name的值是变量的名称，value的值时变量定义的值。通过定义的值会被插入到logger上下文中。定义变量后，可以使“${}”来使用变量。 -->
    <!-- 日志保存路径：当前项目首目录下-->
    <property name="log.path" value="./logs" />
    <!--输出到控制台-->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <!--此日志appender是为开发使用，只配置最底级别，控制台输出的日志级别是大于或等于此级别的日志信息-->
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>debug</level>
        </filter>
        <encoder>
            <pattern>%date{yyyy-MM-dd HH:mm:ss} | %boldGreen(%thread) | %highlight(%-5level) | %boldYellow(%logger) | %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
    </appender>

    <!--输出到debug-->
    <appender name="debug" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/logback-debug-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%date{yyyy-MM-dd HH:mm:ss} | %thread | %-5level | %logger | %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印DEBUG日志 -->
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--输出到info-->
    <appender name="info" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/logback-info-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%date{yyyy-MM-dd HH:mm:ss} | %thread | %-5level | %logger | %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印INFO日志 -->
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--输出到error-->
    <appender name="error" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/logback-error-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%date{yyyy-MM-dd HH:mm:ss} | %thread | %-5level | %logger | %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <!-- 只打印ERROR日志 -->
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--输出到warn-->
    <appender name="warn" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/logback-warn-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%date{yyyy-MM-dd HH:mm:ss} | %thread | %-5level | %logger | %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <!-- 只打印WARN日志 -->
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <logger name="org.springframework" level="warn"/>

    <!--分别设置对应的日志输出节点 -->
    <root level="info">
        <appender-ref ref="console" />
        <appender-ref ref="debug" />
        <appender-ref ref="info" />
        <appender-ref ref="error" />
        <appender-ref ref="warn" />
    </root>
</configuration>

3、在application.yml中配置

logging:
  file:
    #日志保存路径：当前项目首目录下
    path: ./logs
    #日志保存的最长时间，过时自动删除
    max-history: 15
    #日志文件的最大大小
    max-size:
  #  config: classpath:logback-spring.xml
  config: classpath:logback-spring.xml
  #打印出mybatis的sql
  #当前级别是debug
  level:
    com.zhiliao.vms: debug