logger 的使用 二logback使用配置详解

参考：https://www.cnblogs.com/reason-cai/p/6763108.html

1.依赖：

<properties>
　　　　<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
　　　　<logback.version>1.1.7</logback.version>
　　　　<slf4j.version>1.7.21</slf4j.version>
　　</properties>

　　<dependencies>
　　　　<dependency>
　　　　　　<groupId>org.slf4j</groupId>
　　　　　　<artifactId>slf4j-api</artifactId>
　　　　　　<version>${slf4j.version}</version>
　　　　　　<scope>compile</scope>
　　　　</dependency>
　　　　<dependency>
　　　　　　<groupId>ch.qos.logback</groupId>
　　　　　　<artifactId>logback-core</artifactId>
　　　　　　<version>${logback.version}</version>
　　　　</dependency>
　　　　<dependency>
　　　　　　<groupId>ch.qos.logback</groupId>
　　　　　　<artifactId>logback-classic</artifactId>
　　　　　　<version>${logback.version}</version>
　　　　　　</dependency>
　　</dependencies>

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2.logback.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
<!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->
<property name="LOG_HOME" value="/home" />
<!-- 控制台输出 -->
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
</encoder>
</appender>
<!-- 按照每天生成日志文件 -->
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!--日志文件输出的文件名-->
<FileNamePattern>${LOG_HOME}/TestWeb.log.%d{yyyy-MM-dd}.log</FileNamePattern>
<!--日志文件保留天数-->
<MaxHistory>30</MaxHistory>
</rollingPolicy>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
</encoder>
<!--日志文件最大的大小-->
<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>10MB</MaxFileSize>
</triggeringPolicy>
</appender>

<!-- 日志输出级别 -->
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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3.可参考的logback.xml

我的logback.xml常用配置：

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds">
<property name="LOG_HOME" value="../log2" />
    <!-- Simple file output -->
    <appender name="FILE"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- encoder defaults to ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
        <encoder>
            <pattern>
                [ %-5level] [%date{yyyy-MM-dd HH:mm:ss.SSS}] %logger{96} [%line] [%thread]- %msg%n
            </pattern>

            <charset>UTF-8</charset> <!-- 此处设置字符集 -->
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- rollover daily 配置日志所生成的目录以及生成文件名的规则 -->
            <fileNamePattern>${LOG_HOME}/log_%d{yyyyMMdd}.%i.log</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <!-- or whenever the file size reaches 64 MB -->
                <maxFileSize>64 MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <maxHistory>30</maxHistory>
        </rollingPolicy>


        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>INFO</level>
        </filter>
        <!-- Safely log to the same file from multiple JVMs. Degrades performance! -->
        <prudent>false</prudent>
    </appender>


    <!-- Console output -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoder defaults to ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
        <encoder>
            <pattern>
                [ %-5level] [%date{yyyy-MM-dd HH:mm:ss.SSS}] %logger{96} [%line] [%thread]- %msg%n
            </pattern>
            <charset>UTF-8</charset> <!-- 此处设置字符集 -->
        </encoder>
        <!-- Only log level WARN and above -->
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>INFO</level>
        </filter>
    </appender>
    
    <!-- 邮件监控异常 -->
<!--    <appender name="EMAIL" class="ch.qos.logback.classic.net.SMTPAppender">
        <smtpHost>smtp.163.com</smtpHost>
        <username>cairs-2w010@163.com</username>
        <password>zxc1s2dsa46</password>
        <from>cairs-2010@163.com</from>
        <to>[email protected]</to>
        <subject>【web-ext-Error】: %logger</subject>
     <layout class="ch.qos.logback.classic.html.HTMLLayout"/>   
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
    </appender>-->

    <!-- Enable FILE and STDOUT appenders for all log messages. By default, 
        only log at level INFO and above. -->
    <root level="INFO">
        <appender-ref ref="FILE" />
        <!--<appender-ref ref="STDOUT" />-->
        <!--<appender-ref ref="EMAIL" />-->
    </root>

    <!-- For loggers in the these namespaces, log at all levels. -->
    <!-- <logger name="pedestal" level="ALL" /> <logger name="hammock-cafe" 
        level="ALL" /> <logger name="user" level="ALL" /> -->
</configuration>

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