如何解決springboot整合spark日誌打印級別問題？

一、由於項目中使用到了springboot框架，會導致springboot中的slf4j和spark中的log4j日誌組件衝突，springboot推薦使用slf4j+logback的模式來記錄日誌，logback比log4j更快的實現、更完善的配置，因此：
1、pom文件中去除依賴了log4j的jar包。這一步不做也可以但是會導致，slf4j同時logback和log4j，產生衝突。

	<exclusions>
		<exclusion>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
		</exclusion>
	</exclusions>

二、在需要記錄日誌的項目的src/resource目錄下，添加logback.xml配置，控制檯打印級別設置到DEBUG以上即可。

<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:noNamespaceSchemaLocation="http://www.padual.com/java/logback.xsd"
	debug="false" scan="true" scanPeriod="30 second">

	<property name="PROJECT" value="mine.server" />
	<property name="ROOT" value="logs/${PROJECT}/" />
	<property name="FILESIZE" value="50MB" />
	<property name="MAXHISTORY" value="100" />
	<timestamp key="DATETIME" datePattern="yyyy-MM-dd HH:mm:ss" />
	<!-- 控制檯打印 -->
	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
		<encoder charset="utf-8">
			<pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
			</pattern>
		</encoder>
		<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
			<level>info</level>		<!-- only show error msg in stdout -->
		</filter>
	</appender>
	<!-- ERROR 輸入到文件，按日期和文件大小 -->
	<appender name="ERROR"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<encoder charset="utf-8">
			<pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
			</pattern>
		</encoder>
		<filter class="ch.qos.logback.classic.filter.LevelFilter">
			<level>ERROR</level>
			<onMatch>ACCEPT</onMatch>
			<onMismatch>DENY</onMismatch>
		</filter>
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<fileNamePattern>${ROOT}%d/error.%i.log</fileNamePattern>
			<maxHistory>${MAXHISTORY}</maxHistory>
			<timeBasedFileNamingAndTriggeringPolicy
				class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
				<maxFileSize>${FILESIZE}</maxFileSize>
			</timeBasedFileNamingAndTriggeringPolicy>
		</rollingPolicy>
	</appender>

	<!-- WARN 輸入到文件，按日期和文件大小 -->
	<appender name="WARN"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<encoder charset="utf-8">
			<pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
			</pattern>
		</encoder>
		<filter class="ch.qos.logback.classic.filter.LevelFilter">
			<level>WARN</level>
			<onMatch>ACCEPT</onMatch>
			<onMismatch>DENY</onMismatch>
		</filter>
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<fileNamePattern>${ROOT}%d/warn.%i.log</fileNamePattern>
			<maxHistory>${MAXHISTORY}</maxHistory>
			<timeBasedFileNamingAndTriggeringPolicy
				class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
				<maxFileSize>${FILESIZE}</maxFileSize>
			</timeBasedFileNamingAndTriggeringPolicy>
		</rollingPolicy>
	</appender>

	<!-- INFO 輸入到文件，按日期和文件大小 -->
	<appender name="INFO"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<encoder charset="utf-8">
			<pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
			</pattern>
		</encoder>
		<filter class="ch.qos.logback.classic.filter.LevelFilter">
			<level>INFO</level>
			<onMatch>ACCEPT</onMatch>
			<onMismatch>DENY</onMismatch>
		</filter>
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<fileNamePattern>${ROOT}%d/info.%i.log</fileNamePattern>
			<maxHistory>${MAXHISTORY}</maxHistory>
			<timeBasedFileNamingAndTriggeringPolicy
				class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
				<maxFileSize>${FILESIZE}</maxFileSize>
			</timeBasedFileNamingAndTriggeringPolicy>
		</rollingPolicy>
	</appender>
	<!-- DEBUG 輸入到文件，按日期和文件大小 -->
	<appender name="DEBUG"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<encoder charset="utf-8">
			<pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
			</pattern>
		</encoder>
		<filter class="ch.qos.logback.classic.filter.LevelFilter">
			<level>DEBUG</level>
			<onMatch>ACCEPT</onMatch>
			<onMismatch>DENY</onMismatch>
		</filter>
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<fileNamePattern>${ROOT}%d/debug.%i.log</fileNamePattern>
			<maxHistory>${MAXHISTORY}</maxHistory>
			<timeBasedFileNamingAndTriggeringPolicy
				class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
				<maxFileSize>${FILESIZE}</maxFileSize>
			</timeBasedFileNamingAndTriggeringPolicy>
		</rollingPolicy>
	</appender>
	<!-- TRACE 輸入到文件，按日期和文件大小 -->
	<appender name="TRACE"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<encoder charset="utf-8">
			<pattern>[%-5level] %d{${DATETIME}} [%thread] %logger{36} - %m%n
			</pattern>
		</encoder>
		<filter class="ch.qos.logback.classic.filter.LevelFilter">
			<level>TRACE</level>
			<onMatch>ACCEPT</onMatch>
			<onMismatch>DENY</onMismatch>
		</filter>
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<fileNamePattern>${ROOT}%d/trace.%i.log</fileNamePattern>
			<maxHistory>${MAXHISTORY}</maxHistory>
			<timeBasedFileNamingAndTriggeringPolicy
				class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
				<maxFileSize>${FILESIZE}</maxFileSize>
			</timeBasedFileNamingAndTriggeringPolicy>
		</rollingPolicy>
	</appender>

	<!-- SQL相關日誌輸出 -->
	<logger name="org.apache.ibatis" level="INFO" additivity="false" />
	<logger name="org.mybatis.spring" level="INFO" additivity="false" />
	<logger name="com.github.miemiedev.mybatis.paginator" level="INFO"
		additivity="false" />
	<!-- Logger 根目錄 -->
	<root level="DEBUG">
		<appender-ref ref="DEBUG" />
		<appender-ref ref="ERROR" />
		<appender-ref ref="WARN" />
		<appender-ref ref="INFO" />
		<appender-ref ref="TRACE" />
	</root>
	<root level="ERROR">
		<appender-ref ref="STDOUT" />
	</root>
</configuration>