-
- 示例代码
val spark = SparkSession
.builder()
.appName("Spark SQL basic example")
.config("spark.some.config.option", "some-value")
.getOrCreate()
val connectionProperties = new Properties()
connectionProperties.put("user", "CMALLusr")
connectionProperties.put("password", "PCy5VJYd1Ysn")
val df = spark.read.jdbc("jdbc:mysql://10.37.154.65:3306/cmallpre2", "t_order_1", connectionProperties).toDF
//df.select("SKU_NAME").show()
val group_df= df.groupBy("SKU_NAME").count().orderBy("count")
group_df.show()
group_df.printSchema
//group_df.toJavaRDD.saveAsTextFile("/home/spark/group.txt")
spark.close()
-
- Maven的pom配置
<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>sp1</groupId>
<artifactId>sp1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<!--spark scala -->
<!-- <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-library</artifactId>
<version>${scala.version}</version> </dependency> -->
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source />
<target />
</configuration>
</plugin>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.2.2</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaVersion>2.11.8</scalaVersion>
</configuration>
</plugin>
</plugins>
</build>
</project>