springboot集成Log4j2

怼烎@ 2021-10-15 06:18 339阅读 0赞

前言：关于Log4j2，SLF4J，LogBack以及其他的一些日志框架的区别，建议大家可以先了解一下

## 一、添加依赖 ##

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

## 二、application.properties中添加配置 ##

# log4j2 配置文件地址，而且log4j2-spring.xml作为默认的配置文件名，在resources目录下是就算不配置也会默认读
    logging.config=classpath:log4j2-spring.xml

## 三、创建相关配置文件 ##

> 配置文件应该放在resources目录下，关于配置方面的详细内容，可以参考下面几篇博文以及项目demo

*  [https://www.jianshu.com/p/087a20d4aba8][https_www.jianshu.com_p_087a20d4aba8]
 *  [https://www.jianshu.com/p/5dcf4ece0de3][https_www.jianshu.com_p_5dcf4ece0de3]
 *  [https://www.jianshu.com/p/19628db2e7ef][https_www.jianshu.com_p_19628db2e7ef]
 *  [https://github.com/bycuimiao/springboot2-log4j2-demo][https_github.com_bycuimiao_springboot2-log4j2-demo]

<?xml version="1.0" encoding="UTF-8"?>
    
    
    
    
    <configuration status="info" monitorInterval="30">
        
        <appenders>
            
            <console name="Console" target="SYSTEM_OUT">
                <ThresholdFilter level="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/>
                
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            </console>
    
            <RollingFile name="RollingFileDebug" fileName="${sys:user.home}/logs/hpaasvc/debug.log" filePattern="${sys:user.home}/logs/hpaasvc/$${date:yyyy-MM}/debug-%d{yyyy-MM-dd}-%i.log">
                <Filters>
                    
                    <ThresholdFilter level="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/>
                    <ThresholdFilter level="INFO" onMatch="DENY" onMismatch="NEUTRAL"/>
                </Filters>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="100 MB"/>
                </Policies>
            </RollingFile>
            
            <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/hpaasvc/info.log" filePattern="${sys:user.home}/logs/hpaasvc/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
                <Filters>
                    
                    <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
                    <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
                </Filters>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="100 MB"/>
                </Policies>
            </RollingFile>
    
            <RollingFile name="RollingFileWarn" fileName="${sys:user.home}/logs/hpaasvc/warn.log" filePattern="${sys:user.home}/logs/hpaasvc/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
                <Filters>
                    <ThresholdFilter level="WARN" onMatch="ACCEPT" onMismatch="DENY"/>
                    <ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="NEUTRAL"/>
                </Filters>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="100 MB"/>
                </Policies>
                
                <DefaultRolloverStrategy max="20"/>
            </RollingFile>
    
            <RollingFile name="RollingFileError" fileName="${sys:user.home}/logs/hpaasvc/error.log" filePattern="${sys:user.home}/logs/hpaasvc/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">
                <ThresholdFilter level="ERROR"/>
                <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="100 MB"/>
                </Policies>
            </RollingFile>
    
        </appenders>
        
        <loggers>
            
            <logger name="org.springframework" level="INFO">
            </logger>
    
            <root level="all">
                <appender-ref ref="Console"/>
                <appender-ref ref="RollingFileDebug"/>
                <appender-ref ref="RollingFileInfo"/>
                <appender-ref ref="RollingFileWarn"/>
                <appender-ref ref="RollingFileError"/>
            </root>
        </loggers>
    
    </configuration>

## 使用Log4j2进行日志记录 ##

@RestController
    @RequestMapping("/users")
    public class UserController { 
    
        public final Logger logger= LoggerFactory.getLogger(getClass());
    
        @Autowired
        UserService userService;
    
        @PostMapping("/login")
        public RestResult login(@RequestBody User loginUser) { 
            logger.debug("/users/login [Post] -> loginUser : {}", loginUser);
            return userService.login(loginUser);
        }
    
    }

> 总结：在使用Log4j2后我个人感觉，他的优势和劣势都是使用xml进行配置的方便，为什么说这也是劣势呢，因为我看了好多才搞懂各个xml的参数含义等等，当然了，我觉得这不是Log4j2的劣势，是我的劣势 -\_- 。

[https_www.jianshu.com_p_087a20d4aba8]: https://www.jianshu.com/p/087a20d4aba8
[https_www.jianshu.com_p_5dcf4ece0de3]: https://www.jianshu.com/p/5dcf4ece0de3
[https_www.jianshu.com_p_19628db2e7ef]: https://www.jianshu.com/p/19628db2e7ef
[https_github.com_bycuimiao_springboot2-log4j2-demo]: https://github.com/bycuimiao/springboot2-log4j2-demo