springBoot 通过使用log4j2

我会带着你远行 2023-10-01 19:19 13阅读 0赞

#### 1.排除 Spring-boot-starter 默认的日志配置 ####

将原本的 spring-boot-starter 改为

<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>

#### 2.引入log4j2依赖 ####

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-log4j2</artifactId>
    	</dependency>

**这种，引入的log4j2版本不是最新的，会跟你的springboot引入版本对应，且2.0-2.15之间有bug;**

**可以自定义引入版本（排除log4j-core和log4j-api,并重新引入最新版本（2.16.0））**

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-log4j2</artifactId>
                <exclusions>
                    <exclusion>
                        <groupId>org.apache.logging.log4j</groupId>
                        <artifactId>log4j-api</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>org.apache.logging.log4j</groupId>
                        <artifactId>log4j-core</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-api</artifactId>
                <version>2.16.0</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-core</artifactId>
                <version>2.16.0</version>
            </dependency>

#### 3.在你项目的resource目录下，跟application.properties同级目录下添加一个配置文件，文件名为 **log4j2.xml** ####

参考模板

<?xml version="1.0" encoding="UTF-8"?>
    
    
    <configuration monitorInterval="5">
        
     
        
        <Properties>
            
            <property name="LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight{%-5level}[%thread] %style{%logger{36}}{cyan} : %msg%n" />
     
            
            <property name="FILE_PATH" value="日志文件存储路径" />
            <property name="FILE_NAME" value="项目名称" />
        </Properties>
     
        <appenders>
            <console name="Console" target="SYSTEM_OUT">
                
                <PatternLayout pattern="${LOG_PATTERN}" disableAnsi="false" noConsoleNoAnsi="false"/>
                
                <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            </console>
     
            
            <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="20MB"/>
                </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="20MB"/>
                </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="20MB"/>
                </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="RollingFileInfo"/>
                <appender-ref ref="RollingFileWarn"/>
                <appender-ref ref="RollingFileError"/>
            </root>
        </loggers>
    </configuration>

#### 4.在 application.properties 中加入配置文件的扫描位置 ####

logging.config=classpath:log4j2.xml

![img][]

测试，启动成功。

![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAQXJjaGllX2phdmE_size_17_color_FFFFFF_t_70_g_se_x_16]

[img]: https://img-blog.csdnimg.cn/img_convert/e6a243d1dc5b65e60a0de7a047169268.png
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAQXJjaGllX2phdmE_size_17_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/7593a052a6a64c309b3623c5c02d8f27.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAQXJjaGllX2phdmE=,size_17,color_FFFFFF,t_70,g_se,x_16