在用IntelliJ Idea 运行Spark程序的时候，发现i

provided 源码阶段生效
原

<dependency> <!-- Spark dependency -->
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-sql_2.12</artifactId>
      <version>2.4.4</version>
      <scope>provided</scope>
    </dependency>

compile 源码/编译阶段生效
改为

<dependency> <!-- Spark dependency -->
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-sql_2.12</artifactId>
      <version>2.4.4</version>
      <scope>compile</scope>
    </dependency>