环境

springboot 2.2.0

log4j2配置文件详情如下

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

<!-- log4j2配置文件与log4j(1.x版本)有很大不同 -->
<!-- status 日志级别, TRACE < DEBUG < INFO < WARN < ERROR < FATAL -->
<!-- monitorInterval 每隔300秒重新读取配置文件, 可以不重启应用的情况下修改配置 -->
<Configuration status="DEBUG" monitorInterval="300">
    <Properties>
        <property name="LOG_PATH">/app/comhensive/logs</property>
        <Property name="LOG_LAYOUT">%-5p [%d{yyyy-MM-dd HH:mm:ss}] %t [%c:%L] - %m%n</Property>
    </Properties>

    <Appenders>
        <!-- 控制台 -->
        <Console name="console" target="SYSTEM_OUT">
            <encoder>
                <!--字符编码-->
                <charset>UTF-8</charset><!--此处设置字符集-->
            </encoder>
            <PatternLayout pattern="${LOG_LAYOUT}" />
        </Console>
        
        <RollingFile name="file_root" fileName="${LOG_PATH}/root.log" 
                        filePattern="${LOG_PATH}/$${date:yyyy-MM-dd}/root-%d{yyyy-MM-dd}-%i.log">
            <PatternLayout>
                <Pattern>${LOG_LAYOUT}</Pattern>
            </PatternLayout>
            <Policies>
                <TimeBasedTriggeringPolicy />
                <!-- 指定当文件体积大于size指定的值时, 触发Rolling -->
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="20" />
        </RollingFile>
        
        <RollingFile name="file_springframework" fileName="${LOG_PATH}/springframework.log" 
                        filePattern="${LOG_PATH}/$${date:yyyy-MM-dd}/springframework-%d{yyyy-MM-dd}-%i.log">
            <PatternLayout>
                <Pattern>${LOG_LAYOUT}</Pattern>
            </PatternLayout>
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="20" />
        </RollingFile>
        
        <RollingFile name="file_project" fileName="${LOG_PATH}/project.log" 
                        filePattern="${LOG_PATH}/$${date:yyyy-MM-dd}/project-%d{yyyy-MM-dd}-%i.log">
            <PatternLayout>
                <Pattern>${LOG_LAYOUT}</Pattern>
            </PatternLayout>
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="20" />
        </RollingFile>
    </Appenders>

    <Loggers>
        <Logger name="com.test" level="DEBUG" additivity="false">
            <AppenderRef ref="file_project" />
            <AppenderRef ref="console" />
        </Logger>
        <Logger name="org.springframework" level="ERROR" additivity="false">
            <AppenderRef ref="file_springframework" />
            <AppenderRef ref="console" />
        </Logger>

        <Root level="ERROR">
            <AppenderRef ref="file_root" />
            <AppenderRef ref="console" />
        </Root>
    </Loggers>
</Configuration>

将写好的配置文件放在resource目录下，application.propeties 的声明如下：

logging.config=classpath:log4j2.xml

另外在引入项目依赖的时候，有时候会提示log42j重复引入的问题，这时候需要排除logging的引入
部分关键代码如下：
引入部分：

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
            <version>2.1.2.RELEASE</version>
        </dependency>

排除部分：

      <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>