SpringBoot集成Log4j2写入mongoDB

• application.properties

# mongoDB
spring.data.mongodb.host=xxx
spring.data.mongodb.port=27017
spring.data.mongodb.database=xxxx
# log4j2
logging.config=classpath:log4j2.xml

• 排除自带的logging 如果是web项目 在spring-boot-web里排除

   <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>${springboot.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
            <!--使用下面这个和上面排除spring-boot-starter-logging是一样的效果
   <exclusions>
      <exclusion>
         <artifactId>logback-classic</artifactId>
         <groupId>ch.qos.logback</groupId>
      </exclusion>
      <exclusion>
         <artifactId>log4j-over-slf4j</artifactId>
         <groupId>org.slf4j</groupId>
      </exclusion>
   </exclusions>-->
        </dependency>

•  导入包

 <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongo-java-driver</artifactId>
            <version>3.10.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-nosql</artifactId>
            <version>2.9.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
            <version>2.0.6.RELEASE</version>
        </dependency>

• log4j2.xml 

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF">
    <Appenders>
        <!--将日志在控制台输出-->
        <Console name="console" target="SYSTEM_OUT" follow="true">
            <!--  控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch） -->
            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            <!--日志输出的格式-->
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p $r [%t] %C.%M(%L) | %m%n"/>
        </Console>

        <RollingFile name="infofile" fileName="../logs/info.log" filePattern="../logs/info.log.%d{yyyy-MM-dd}">
            <!--过滤日志级别，确保该文件中只能保存INFO和WARN级别的日志-->
            <Filters>
                <ThresholdFilter level="INFO"/>
                <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <!--日志文件产生的策略，每隔一定的时间产生一个新的日志文件-->
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>

        <RollingFile name="warnfile" fileName="../logs/warn.log" filePattern="../logs/warn.log.%d{yyyy-MM-dd}">
            <Filters>
                <ThresholdFilter level="WARN"/>
                <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>
        </RollingFile>

        <RollingFile name="errorfile" fileName="../logs/error.log" filePattern="../logs/error.log.%d{yyyy-MM-dd}">
            <ThresholdFilter level="ERROR"/>
            <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>
        </RollingFile>

        <NoSql name="errorMongo" bufferSize="18"><!-- error日志 -->
            <MongoDb databaseName="xxx" collectionName="errorLog" server="" port="27017"/>
        </NoSql>
        <NoSql name="infoMongo" bufferSize="18"><!-- info日志 -->
            <MongoDb databaseName="xxx" collectionName="infoLog" server="" port="27017"/>
        </NoSql>
        <NoSql name="debugMongo" bufferSize="18"><!-- debug日志 -->
            <MongoDb databaseName="xxx" collectionName="debugLog" server="" port="27017"/>
        </NoSql>
    </Appenders>

    <Loggers>
        <Logger name="errorMongoLog" level="error" additivity="true">
            <appender-ref ref="errorMongo"/>
        </Logger>
        <Logger name="infoMongoLog" level="info" additivity="true">
            <appender-ref ref="infoMongo"/>
        </Logger>
        <Logger name="debugMongoLog" level="debug" additivity="true">
            <appender-ref ref="debugMongo"/>
        </Logger>
      
        <Root level="info">
            <appender-ref ref="console"/>
            <appender-ref ref="infofile"/>
            <appender-ref ref="warnfile"/>
            <appender-ref ref="errorfile"/>
        </Root>
    </Loggers>
</Configuration>