scala+spark的工程中采用maven構(gòu)建
1、首先在src/main/resources下加入logback.xml
2、maven下加入
<dependency>
? ? ?<groupId>com.typesafe.scala-logging</groupId>
? ? ? <artifactId>scala-logging_2.11</artifactId>
? ? ? <version>3.5.0</version>
</dependency>
<dependency>
? ? ?<groupId>ch.qos.logback</groupId>
? ? ? <artifactId>logback-classic</artifactId>
? ? ? ?<version>1.2.3</version>
</dependency>
3、使用的方法
private[this]val logger =Logger(this.getClass)
logger.info("server ready ...... ")
警告，控制臺卻出現(xiàn)如下提示：
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/nibaohua/onway/mavenpro/repo/org/slf4j/slf4j-log4j12/1.7.16/slf4j-log4j12-1.7.16.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/nibaohua/onway/mavenpro/repo/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
log4j:WARN No appenders could be found for logger (Test1$).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
其實(shí)很簡單，查看問題說明引入了多個(gè)slf4j，在maven下面飲用的jar包也可以看到，找到依賴該jar的包，修改如下，增加exclusions
<dependency>
? ? ? ?<groupId>org.apache.spark</groupId>
? ? ? ? <artifactId>spark-core_2.11</artifactId>
? ? ? ? ? ? <version>${spark}</version>
? ? ? ? <exclusions>
? ? ? ? ? ? <exclusion>
? ? ? ? ? ? ? ? ? <groupId>org.slf4j</groupId>?
? ? ? ? ? ? ? ? ? ?<artifactId>slf4j-log4j12</artifactId>
? ? ? ? ? ? </exclusion>
? ? ? ? ? ?<exclusion>
? ? ? ? ? ? ? ? ?<groupId>log4j</groupId>
? ? ? ? ? ? ? ? ?<artifactId>log4j</artifactId>
? ? ? ? ? ?</exclusion>
? ? ? ? ?</exclusions>
</dependency>
