springboot整合log4j

1、排除springboot的自带的logback

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <!-- 排除自带的logback依赖 -->
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>

添加依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j</artifactId>
    <version>1.3.8.RELEASE</version>
</dependency>

如果抛出异常

SLF4J: Class path contains multiple SLF4J bindings.

查看依赖（IDEA右侧）

比如aop

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
    <exclusions>
    <!-- 排除自带的logback依赖 -->
    <exclusion>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-logging</artifactId>
    </exclusion>
    </exclusions>
</dependency>

也是需要排除的

2、引入log4j

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j</artifactId>
    <version>1.3.8.RELEASE</version>
</dependency>

3、配置

application.yml

logging:
  # 设置logback.xml位置
  #  config: classpath:log/logback.xml
  # 设置log4j.properties位置
  config: classpath:log4j.properties

log4j.properties

log4j.rootLogger=DEBUG,error,CONSOLE,info

# appender
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender     
# PatternLayout
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout     
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n    

# info
log4j.logger.info=info
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout     
log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.info.datePattern='.'yyyy-MM-dd
log4j.appender.info.Threshold = info
log4j.appender.info.append=true
log4j.appender.info.File=D:/dance/demo/log/info.log

log4j.logger.error=error  
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout     
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.error.datePattern='.'yyyy-MM-dd
log4j.appender.error.Threshold = error   
log4j.appender.error.append=true
log4j.appender.error.File=D:/dance/demo/log/error.log

log4j.logger.DEBUG=DEBUG
log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout     
log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd
log4j.appender.DEBUG.Threshold = DEBUG   
log4j.appender.DEBUG.append=true
log4j.appender.DEBUG.File=D:/dance/demo/log/dubug.log

4. 这里对log4j2的记录一下，log4j2的简单配置 

<configuration status="OFF" monitorInterval="30">
    <Appenders>
        <!--设置在控制台打印日志-->
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout
                    pattern="%highlight{%date{yyyy-MM-dd HH:mm:ss.SSS}456789 %-5level [%-6.-6pid] %-20.-20logger{1.}[line:%-4line] [%thread] - %msg%n}"/>
　　　　　　　　<RegexFilter regex=".*securityLog.*" onMatch="ACCEPT" onMismatch="DENY"/>
        </Console>
        <!--自定义appender-->
        <Console name="console_security_appender" target="SYSTEM_OUT">
            <PatternLayout pattern="%m%n"/>
　　　　　　　　<RegexFilter regex=".*securityLog.*" onMatch="DENY" onMismatch="ACCEPT"/>
        </Console>
    </Appenders>
    <Loggers>
        <!-- security_log 日志 -->
        <Logger name="security_log" additivity="true">
            <AppenderRef ref="console_security_appender"/>
        </Logger>
        <!--debug级别以上都输出到console-->
        <Root level="DEBUG">
            <AppenderRef ref="console"/>
        </Root>
    </Loggers>
</configuration>

需要在application.yml引入

logging:
  config: classpath:config/log4j2.xml

以上的 log4j2.xml 和 application.yml 都在resouce的config目录

参考博客：

https://blog.csdn.net/u010663021/article/details/108388817

关于log4j2的详细过滤器

https://logging.apache.org/log4j/2.x/manual/filters.html

转载自: https://cloud.tencent.com/developer/article/1782929