5、log4j2的RandomAccessFile标签

第一步：添加依赖

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.example</groupId>
	<artifactId>logging-test</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<properties>
		<maven.compiler.source>8</maven.compiler.source>
		<maven.compiler.target>8</maven.compiler.target>
	</properties>

	<dependencies>
		<dependency>
			<artifactId>junit</artifactId>
			<groupId>junit</groupId>
			<version>4.12</version>
		</dependency>
		<!-- Log4j2 门面API -->
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-api</artifactId>
			<version>2.14.1</version>
		</dependency>
		<!-- Log4j2 日志实现 -->
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-core</artifactId>
			<version>2.14.1</version>
		</dependency>
		<!--使用slf4j作为日志的门面,使用log4j2来记录日志 -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.7.30</version>
		</dependency> 
		<!--为slf4j绑定日志实现 log4j2的适配器 -->
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-slf4j-impl</artifactId>
			<version>2.12.1</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.8.1</version>
				<configuration>
					<source>${maven.compiler.source}</source>
					<target>${maven.compiler.target}</target>
					<encoding>UTF-8</encoding>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

第二步：log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- monitorInterval="30"表示当修改了配置文件，我们不需要重启，它每30秒重新加载配置文件 -->
<Configuration status="WARN" monitorInterval="30">
	<Appenders>
		<Console name="Console" target="SYstem_OUT">
			<PatternLayout
				pattern="%d{HH:mm:ss} [%t] %-5level %logger{36} - %msg%n" />
		</Console>
		
		<File name="file" fileName="D://logs/myfile.log">
			<PatternLayout
				pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}] [%-5level] %l %c{36} - %m%n" />
		</File>

		<RandomAccessFile name="accessFile"
			fileName="D://logs/myAcclog.log">
			<PatternLayout
				pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS}] [%-5level] %l %c{36} - %m%n" />
		</RandomAccessFile>
	</Appenders>
	<Loggers>
		<Root level="error">
			<AppenderRef ref="Console" />
			<AppenderRef ref="accessFile" />
		</Root>
	</Loggers>
</Configuration>

第三步：测试代码

package com.example.test;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestLog4j2 {

	private static final Logger LOGGER = LoggerFactory.getLogger(TestLog4j2.class);

	@Test
	public void testLog4j2() {
		LOGGER.error("error");
		LOGGER.warn("warn");
		LOGGER.info("info");
		LOGGER.debug("debug");
		LOGGER.trace("trace");
	}

}