小白的springboot之路(十二)、集成log4j2日志

0、前言

  日志记录对系统来说必不可少,spring boot中常用的日志组件有log4j、logback、log4j2,其中logback是spring boot默认的,已自带;选用log4j2就可以,其他的不必去关注;

一、集成log4j2日志组件

1、pom依赖中去除默认的logback日志框架:

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

        <!-- 7-1 去掉自带的日志依赖-->
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

2、添加依赖

        <!-- 7-2、集成log4j2  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>
        <!-- 额外添加disruptor依赖,用于解决log4j2日志版本较低报错问题-->
        <dependency>
            <groupId>com.lmax</groupId>
            <artifactId>disruptor</artifactId>
            <version>3.4.2</version>
        </dependency>

3、增加日志配置文件log4j2-dev.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--设置log4j2的自身log级别为warn-->
<!--日志级别以及优先级排序: OFF > FATAL > ERROR > WARN > INFO > DEBUG > TRACE > ALL -->
<!--Configuration后面的status,这个用于设置log4j2自身内部的信息输出,可以不设置,
    当设置成trace时,你会看到log4j2内部各种详细输出-->
<!--monitorInterval:Log4j能够自动检测修改配置 文件和重新配置本身,设置间隔秒数-->


<Configuration status="INFO" monitorInterval="30">
    <Properties>
        <!--  输出路径  -->
        <Property name="logpath">/Log4j/logs/log/dev</Property>
    </Properties>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout
                    pattern="[%d][%-5p][%t] %m (%F:%L)%n"/>
        </Console>
        <RollingFile name="debug" fileName="${logpath}/debug/erp_debug.log"
                     filePattern="${logpath}/debug/erp_debug_%d{yyyy-MM-dd}-%i.log">
            <Filters>
                <ThresholdFilter level="info" onMatch="DENY" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="debug" onMatch="ACCEPT" onMismatch="DENY"/>
            </Filters>
            <PatternLayout pattern="[%d][%-5p][%t] %m (%F:%L)%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="24" modulate="true"/>
                <SizeBasedTriggeringPolicy size="50 MB"/>\
            </Policies>
            <DefaultRolloverStrategy max="30">
                <Delete basePath="${logpath}/debug" maxDepth="1">
                    <IfFileName glob="erp_debug_*.log"/>
                    <IfLastModified age="15d"/>
                </Delete>
            </DefaultRolloverStrategy>
        </RollingFile>
        <RollingFile name="info" fileName="${logpath}/info/erp_info.log"
                     filePattern="${logpath}/info/erp_info_%d{yyyy-MM-dd}-%i.log">
            <Filters>
                <ThresholdFilter level="warn" onMatch="DENY" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            </Filters>
            <PatternLayout pattern="[%d][%-5p][%t] %m (%F:%L)%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="24" modulate="true"/>
                <SizeBasedTriggeringPolicy size="50 MB"/>\
            </Policies>
            <DefaultRolloverStrategy max="30">
                <Delete basePath="${logpath}/info" maxDepth="1">
                    <IfFileName glob="erp_info_*.log"/>
                    <IfLastModified age="15d"/>
                </Delete>
            </DefaultRolloverStrategy>
        </RollingFile>
        <RollingFile name="warn" fileName="${logpath}/warn/erp_warn.log"
                     filePattern="${logpath}/warn/erp_warn_%d{yyyy-MM-dd}-%i.log">
            <Filters>
                <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
            </Filters>
            <PatternLayout pattern="[%d][%-5p][%t] %m (%F:%L)%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="24" modulate="true"/>
                <SizeBasedTriggeringPolicy size="50 MB"/>\
            </Policies>
            <DefaultRolloverStrategy max="30">
                <Delete basePath="${logpath}/warn" maxDepth="1">
                    <IfFileName glob="erp_warn_*.log"/>
                    <IfLastModified age="15d"/>
                </Delete>
            </DefaultRolloverStrategy>
        </RollingFile>
        <RollingFile name="error" fileName="${logpath}/error/erp_error.log"
                     filePattern="${logpath}/error/erp_error_%d{yyyy-MM-dd}-%i.log">
            <Filters>
                <ThresholdFilter level="fatal" onMatch="DENY" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
            </Filters>
            <PatternLayout pattern="[%d][%-5p][%t] %m (%F:%L)%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="24" modulate="true"/>
                <!--   每个文件最大50M -->
                <SizeBasedTriggeringPolicy size="50 MB"/>\
            </Policies>
            <DefaultRolloverStrategy max="30">
                <Delete basePath="${logpath}/error" maxDepth="1">
                    <IfFileName glob="erp_error_*.log"/>
                    <!-- 设置最大保存时间为15天-->
                    <IfLastModified age="15d"/>
                </Delete>
            </DefaultRolloverStrategy>
        </RollingFile>

    </Appenders>
    <!--切换输出级别-->
    <Loggers>
        <Root level="info">
            <AppenderRef ref="Console"/>
            <AppenderRef ref="debug"/>
            <AppenderRef ref="info"/>
            <AppenderRef ref="warn"/>
            <AppenderRef ref="error"/>
        </Root>
    </Loggers>
</Configuration>

配置文件中增加配置:

#################### 7 log4j2  ###################
logging.config=classpath:log4j2-dev.xml
logging.level.org.springframework=INFO

 

4、使用

private static final Logger logger = LoggerFactory.getLogger(UserController.class);

    logger.info("未知异常!原因是:info");
    logger.error("未知异常!原因是:error");
    logger.warn("未知异常!原因是:warn");

简单用法,完毕~

微服务中,服务众多,分布在各个服务器中,我们一般不这样使用,我们一般使用ELK来对日志进行统一收集和分析处理,ELK后面再说



上一篇:Elasticsearch学习(6) ELK6.X版本+分词器+log4j2的日志系统


下一篇:java-使用Log4j 2记录日志