一、准备工作

1、准备日志系统所需要的jar包

(若果是maven来管理包，可参考下面配置pom.xml；不是maven项目可参考下载相应的jar包)
注意：这些jar包缺一不可！

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>

2、创建配置文件

在classpath（即src/mian/resources）路径下创建logback.xml配置文件。

二、编写配置

在创建的logback.xml文件中，编写配置。

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <!-- 定义参数常量 -->
    <!-- TRACE<DEBUG<INFO<WARN<ERROR -->
    <!-- logger.trace("msg") logger.debug... -->
    <property name="log.level" value="debug" />
    <property name="log.maxHistory" value="30" />
    <property name="log.filePath" value="${catalina.base}/logs/webapps" />
    <property name="log.pattern"
        value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n" />
    <!-- 控制台设置 -->
    <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
    </appender>
    <!-- DEBUG -->
    <appender name="debugAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 文件路径 -->
        <file>${log.filePath}/debug.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 文件名称 -->
            <fileNamePattern>${log.filePath}/debug/debug.%d{yyyy-MM-dd}.log.gz
            </fileNamePattern>
            <!-- 文件最大保存历史数量 -->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <!-- INFO -->
    <appender name="infoAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 文件路径 -->
        <file>${log.filePath}/info.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 文件名称 -->
            <fileNamePattern>${log.filePath}/info/info.%d{yyyy-MM-dd}.log.gz
            </fileNamePattern>
            <!-- 文件最大保存历史数量 -->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <!-- ERROR -->
    <appender name="errorAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 文件路径 -->
        <file>${log.filePath}/erorr.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 文件名称 -->
            <fileNamePattern>${log.filePath}/error/error.%d{yyyy-MM-dd}.log.gz
            </fileNamePattern>
            <!-- 文件最大保存历史数量 -->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <logger name="com.cn.broncho.o2o" level="${log.level}" additivity="true">
        <appender-ref ref="debugAppender"/>
        <appender-ref ref="infoAppender"/>
        <appender-ref ref="errorAppender"/>
    </logger>
    <root level="info">
        <appender-ref ref="consoleAppender"/>
    </root>
</configuration>

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