intellij idea 配置spark环境遇到的两个问题

在配置spark环境的时候出现两个问题：pom.xml文件如下：<?xml version=“1.0” encoding=“UTF-8”?><project xmlns=“http://maven.apache.org/POM/4.0.0" xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=“http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.spark.zwh</groupId><artifactId>spark-test</artifactId><version>1.0-SNAPSHOT</version><properties> <spark.version>2.4.0</spark.version> <scala.version>2.11</scala.version></properties><dependencies> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-core_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-streaming_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-sql_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-hive_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-mllib_${scala.version}</artifactId> <version>${spark.version}</version> </dependency></dependencies><build> <plugins> <plugin> <groupId>org.scala-tools</groupId> <artifactId>maven-scala-plugin</artifactId> <version>2.15.2</version> <executions> <execution> <goals> <goal>compile</goal> <goal>testCompile</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.6.0</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.19</version> <configuration> <skip>true</skip> </configuration> </plugin> </plugins></build></project>其中<spark.version>2.4.0</spark.version><scala.version>2.11</scala.version>在http://spark.apache.org/downl…：groupId: org.apache.sparkartifactId: spark-core_2.11version: 2.4.0其中2.11为scala版本，2.4.0为spark版本，只有相互对应的版本才能正确编译，否则会出现各种奇怪问题。配置好了却发现右键没有新建scala class选项，查了很多都没有说到点子上，最终发现右键项目-》add frameworks support->scala->ok。现在有scala class选项了。