方法一:
val g=sc.textFile("/hosts").flatMap(x=>x.split(" ")).map(x=>(x,1)).reduceByKey((x,y)=>x+y)
方法二:
scala> val rr=sc.textFile("/test2").flatMap(x=>x.split(" ")).countByValue()
val t1=sc.textFile("/root/testFile/test2").flatMap(x=>x.split(" ")).toDF("word").registerTempTable("words")
sqlContext.sql("select word,count(*) from words group by word ").show
val g=sc.textFile("/hosts").flatMap(x=>x.split(" ")).map(x=>(x,1)).reduceByKey((x,y)=>x+y)
方法二:
scala> val rr=sc.textFile("/test2").flatMap(x=>x.split(" ")).countByValue()
方法三:
sqlContext.sql("select word,count(*) from words group by word ").show