SpringBoot中使用Log4j2配置实例

旧城等待， 2023-05-31 06:50 6阅读 0赞

Spring Boot 默认使用 Logback，但相比较而言，Log4j2 在性能上面会更好。  
添加依赖：  
除了添加log4j2的依赖，还要排除Springboot默认依赖的logback依赖

<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>

然后在`src/main/resources`中添加`log4j2.xml`配置文件:

<?xml version="1.0" encoding="UTF-8"?>
    
    
    <Configuration status="WARN">
    
    	<Properties>
    		<Property name="base.package">com.example.demo</Property>
    		<Property name="log.level">${sys:log4j.log.level:-DEBUG}</Property>
    		<Property name="logfile.path">${sys:log4j.logfile.path:-/data/logs/access}/@artifactId@</Property>
    		<Property name="logfile.arch.path">${sys:log4j.logfile.path:-/data/logs/access}/@artifactId@/${date:yyyy-MM}</Property>
    		<Property name="logfile.arch.suffix">%d{yyyy-MM-dd}-%i.log.gz</Property>
    		<Property name="logOut.pattern">%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight{%5p} ${sys:PID} --- [%15.15t] %-40.40c{1.} : %m%n</Property>
    		<Property name="logfile.pattern">%d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%t] <%c> : %m%n</Property>
    		<Property name="timestamp.pattern">%d{yyyy-MM-dd HH:mm:ss.SSS}{GMT+0}</Property>
    	</Properties>
    
    	<Appenders>
    		
    		<Console name="STDOUT" target="SYSTEM_OUT">
    			<ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="ACCEPT" />
    			<PatternLayout pattern="${logOut.pattern}"/>
    		</Console>
    		<Console name="STDERR" target="SYSTEM_ERR">
    			<ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY" />
    			<PatternLayout pattern="${logOut.pattern}"/>
    		</Console>
    		
    		
    		<RollingRandomAccessFile name="SERVICE_LOG_FILE" fileName="${logfile.path}/service.log" filePattern="${logfile.arch.path}/service-${logfile.arch.suffix}">
    			<PatternLayout pattern="${logfile.pattern}"/>
    			<Policies>
    				
    				<TimeBasedTriggeringPolicy />
    				
    			</Policies>
    			
    			
    			<DefaultRolloverStrategy>
    				
    				<Delete basePath="${logfile.path}" maxDepth="2">
    					
    					<IfFileName glob="*/service-*.log.gz" />
    					
    					<IfLastModified age="180d" />
    				</Delete>
    			</DefaultRolloverStrategy>
    		</RollingRandomAccessFile>
    
    	</Appenders>
    
    	<Loggers>
    		
    		<Root level="INFO">
    			<AppenderRef ref="STDOUT"/>
    			<AppenderRef ref="STDERR"/>
    			<AppenderRef ref="SERVICE_LOG_FILE" />
    		</Root>
    
    		
    		
    		<Logger name="${base.package}" level="${log.level}"></Logger>
    	</Loggers>
    	
    </Configuration>

具体使用就不介绍，通常是通过`lombok`的`@Slf4j`