標題Spark Mavem項目在本地測試報錯 : Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/SparkConf

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/SparkConf
	at StreamingT$.main(StreamingT.scala:8)
	at StreamingT.main(StreamingT.scala)
Caused by: java.lang.ClassNotFoundException: org.apache.spark.SparkConf
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 2 more

　　原因
NoClassDefFoundError表示在運行時找不到類

   <!--運行依賴-->
    <dependencies>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-core_2.11</artifactId>
            <version>2.3.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

<scope>provided</scope>導致在編譯時忽略了這個依賴! 把這行注釋掉即可!如果打包時不需要將這個依賴打進去 , 則需要開啟!
測試

    <!--運行依賴-->
    <dependencies>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-core_2.11</artifactId>
            <version>2.3.0</version>
            <!--<scope>provided</scope>-->
        </dependency>
    </dependencies>