简述

环境

Idea
log4j2

最终工程目录

在这里插入图片描述

步骤

pom.xml修改后刷新

<!-- log -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</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-log4j2</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

application.yml修改

logging:
  config: classpath:log4j2.xml

新文件log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- status指定log4j本身的日志打印级别 -->
<!-- 配置文件发生修改，在monitorInterval时间即5s内，重新加载，无需重启 -->
<Configuration status="WARN" monitorInterval="5">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout charset="UTF-8" pattern="[%d] [%t] [%-5level] %logger{36} - %msg%n" />
        </Console>
        <RollingFile name="RollingFileInfo" filePermissions="rw-r--r--"
                     fileName="/var/log/springboot/spring-boot-start0.log"
                     filePattern="/var/log/springboot/spring-boot-start0-%d{yyyy-MM-dd}-%i.log">
            <Filters>
                <ThresholdFilter level="INFO" />
            </Filters>
            <PatternLayout charset="UTF-8" pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n" />
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100M"/>
            </Policies>
        </RollingFile>
<!--        <CatLog4j2Appender name="Cat" />-->
    </Appenders>
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFileInfo" />
<!--            <AppenderRef ref="Cat" />-->
        </Root>
        <Logger name="org.mybatis" level="INFO" />
        <Logger name="org.springframework" level="INFO" />
        <Logger name="com.ydfind.start" level="INFO" />
    </Loggers>
</Configuration>

测试

package com.ydfind.start.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * log4j2的试验controller
 * @author ydfind
 * @date 2020.1.5
 */
@RestController
@Slf4j
public class Log4jController {
    @GetMapping("/log")
    public String log() {
        log.trace("log name = " + log.getName());
        log.debug("log name = " + log.getName());
        log.info("log name = " + log.getName());
        log.warn("log name = " + log.getName());
        log.error("log name = " + log.getName());
        log.info("log name = " + log.getName());
        return "success";
    }
}