Spark2.0 VS Spark 1.* -------SparkSession的区别
Spark 2.0以前版本:
val sparkConf = new SparkConf().setAppName("soyo")
val spark = new SparkContext(sparkConf)
Spark 2.0以后版本:(上面的写法兼容)
直接用SparkSession:
val spark = SparkSession
.builder
.appName("soyo")
.getOrCreate()
var tc = spark.sparkContext.parallelize(数据).cache()
import org.apache.spark.{SparkConf, SparkContext}
object text {
def main(args: Array[String]): Unit = {
// val conf=new SparkConf().setAppName("测试").setMaster("local[2]")
// val sc= new SparkContext(conf)
// val file=sc.textFile("file:///home/soyo/桌面/spark编程测试数据/1.txt")
val spark=SparkSession.builder().getOrCreate()
// val file=spark.read.textFile("file:///home/soyo/桌面/spark编程测试数据/1.txt").rdd
val file=spark.sparkContext.textFile("file:///home/soyo/桌面/spark编程测试数据/1.txt")
val word=file.flatMap(lines=>lines.split(" ")).map(word=>(word,1)).reduceByKey(_+_)
word.foreach(println)
}
}
都好使!!-------2.2.0