springboot 整合logback(有全套的日志配置文件)

logback介绍：基于Log4j基础上大量改良，不能单独使用，推荐配合日志框架SLF4J来使用，可以和springboot很好的整合，也是springboot默认推荐的。

1.在resources 目录下 创建 logback-spring.xml（推荐使用这个名字）

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <contextName>logback</contextName>
    <property name="log.path" value="D:\\JAVA_LOGS\\transferservice_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>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %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>app_log/log/logback-debug-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %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>app_log/log/logback-info-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %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>app_log/log/logback-error-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %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>app_log/log/logback-warn-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %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>

<!--用户统计-->
    <appender name="dataApp" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>app_log/log/logback-data-%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %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>

    <!--用于统计数据 比如某个方法执行了多少次-->
    <logger name="dataLogger">
        <level value="INFO" />
        <appender-ref ref="dataApp" />
    </logger>

    <!--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>

2.在需要打日志的地方，类下面加上。

private Logger logger = LoggerFactory.getLogger(this.getClass());
//用于统计使用，一般项目小项目不用可忽略
private Logger dataLogger = LoggerFactory.getLogger("dataLogger");
在方法上里加：

//这个数据会保存到统计信息的日志文件中去。
dataLogger.info("module=video_order`api=save`user_id={}`video_id={}",videoOrderDto.getUserId(),videoOrderDto.getVideoId());
//正常的日志记录
logger.info("module=video_order`api=save`user_id={}`video_id={}",videoOrderDto.getUserId(),videoOrderDto.getVideoId());

对于：logback-spring.xml 中的配置说明=》https://blog.csdn.net/haidage/article/details/6794540