Spring Boot整合SLF4j+log4j2

亦凉 2021-08-28 11:27 523阅读 0赞

**一 点睛**

SLF4j作为日志门面，log4j2作为日志实现。

**二 pom**

<?xml version="1.0" encoding="UTF-8"?>
    <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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
       <modelVersion>4.0.0</modelVersion>
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>2.2.6.RELEASE</version>
          <relativePath/> 
       </parent>
       <groupId>com.cakin</groupId>
       <artifactId>springbootlog4j2</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <name>springbootlog4j2</name>
       <description>Demo project for Spring Boot</description>
    
    
       <properties>
          <java.version>1.8</java.version>
       </properties>
    
    
       <dependencies>
          <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>
             <optional>true</optional>
          </dependency>
          <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
             <exclusions>
                <exclusion>
                   <groupId>org.junit.vintage</groupId>
                   <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
             </exclusions>
          </dependency>
       </dependencies>
    
       <build>
          <plugins>
             <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
          </plugins>
       </build>
    
    </project>

**三 配置文件**

1 路径

src/main/resources/log4j2-spring.xml

2 内容

<?xml version="1.0" encoding="UTF-8"?>
    
    
    <configuration monitorInterval="5">
        
    
        
        <Properties>
            
            
            <property name="LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n" />
            
            <property name="FILE_PATH" value="E:\logs\log4j2" />
            <property name="FILE_NAME" value="springbootlog4j2" />
        </Properties>
    
        <appenders>
    
            <console name="Console" target="SYSTEM_OUT">
                
                <PatternLayout pattern="${LOG_PATTERN}"/>
                
                <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            </console>
    
            
            <File name="Filelog" fileName="${FILE_PATH}/test.log" append="false">
                <PatternLayout pattern="${LOG_PATTERN}"/>
            </File>
    
            
            <RollingFile name="RollingFileInfo" fileName="${FILE_PATH}/info.log" filePattern="${FILE_PATH}/${FILE_NAME}-INFO-%d{yyyy-MM-dd}_%i.log.gz">
                
                <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
                <PatternLayout pattern="${LOG_PATTERN}"/>
                <Policies>
                    
                    <TimeBasedTriggeringPolicy interval="1"/>
                    <SizeBasedTriggeringPolicy size="10MB"/>
                </Policies>
                
                <DefaultRolloverStrategy max="15"/>
            </RollingFile>
    
            
            <RollingFile name="RollingFileWarn" fileName="${FILE_PATH}/warn.log" filePattern="${FILE_PATH}/${FILE_NAME}-WARN-%d{yyyy-MM-dd}_%i.log.gz">
                
                <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
                <PatternLayout pattern="${LOG_PATTERN}"/>
                <Policies>
                    
                    <TimeBasedTriggeringPolicy interval="1"/>
                    <SizeBasedTriggeringPolicy size="10MB"/>
                </Policies>
                
                <DefaultRolloverStrategy max="15"/>
            </RollingFile>
    
            
            <RollingFile name="RollingFileError" fileName="${FILE_PATH}/error.log" filePattern="${FILE_PATH}/${FILE_NAME}-ERROR-%d{yyyy-MM-dd}_%i.log.gz">
                
                <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
                <PatternLayout pattern="${LOG_PATTERN}"/>
                <Policies>
                    
                    <TimeBasedTriggeringPolicy interval="1"/>
                    <SizeBasedTriggeringPolicy size="10MB"/>
                </Policies>
                
                <DefaultRolloverStrategy max="15"/>
            </RollingFile>
    
        </appenders>
    
        
        
        <loggers>
    
            
            <logger name="org.mybatis" level="info" additivity="false">
                <AppenderRef ref="Console"/>
            </logger>
            
            
            <Logger name="org.springframework" level="info" additivity="false">
                <AppenderRef ref="Console"/>
            </Logger>
    
            <root level="info">
                <appender-ref ref="Console"/>
                <appender-ref ref="Filelog"/>
                <appender-ref ref="RollingFileInfo"/>
                <appender-ref ref="RollingFileWarn"/>
                <appender-ref ref="RollingFileError"/>
            </root>
        </loggers>
    
    </configuration>

**四 测试**

1 main测试

package com.cakin.springbootlog4j2;
    
    
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    
    @SpringBootApplication
    @Slf4j
    public class Springbootlog4j2Application {
    
    
       public static void main(String[] args) {
          SpringApplication.run(Springbootlog4j2Application.class, args);
          log.debug("sl4j.debug in main");
          log.info("sl4j.info in main");
          log.error("sl4j.error in main");
       }
    }

测试结果

2020-04-22 20:43:06 [main] INFO  com.cakin.springbootlog4j2.Springbootlog4j2Application - sl4j.info in main
    2020-04-22 20:43:06 [main] ERROR com.cakin.springbootlog4j2.Springbootlog4j2Application - sl4j.error in main

2 test测试

package com.cakin.springbootlog4j2;
    
    
    import lombok.extern.slf4j.Slf4j;
    import org.junit.jupiter.api.Test;
    import org.springframework.boot.test.context.SpringBootTest;
    
    
    @SpringBootTest
    @Slf4j
    class Springbootlog4j2ApplicationTests {
    
    
       @Test
       void contextLoads() {
       }
    
    
       @Test
       void testslf4(){
          log.debug("sl4j.debug in main");
          log.info("sl4j.info in main");
          log.error("sl4j.error in main");
       }
    }

测试结果

2020-04-22 20:43:41 [main] INFO  com.cakin.springbootlog4j2.Springbootlog4j2ApplicationTests - sl4j.info in main
    2020-04-22 20:43:41 [main] ERROR com.cakin.springbootlog4j2.Springbootlog4j2ApplicationTests - sl4j.error in main

**五 参考**

[https://blog.csdn.net/qq\_40981804/article/details/][https_blog.csdn.net_qq_40981804_article_details]104037071

[https_blog.csdn.net_qq_40981804_article_details]: https://blog.csdn.net/saytime/article/details/78962999