spark使用广播变量

import java.io.{File, FileReader}
import java.util

import org.apache.spark.SparkConf
import org.apache.spark.broadcast.Broadcast
import org.apache.spark.sql.SparkSession

import scala.collection.mutable.ArrayBuffer


object SparkTest{

  // 使用广播变量过滤 敏感数据
  def main(args: Array[String]): Unit = {

    val conf = new SparkConf().setMaster("local[2]").setAppName("test")
    val spark = SparkSession.builder().config(conf).getOrCreate()
    spark.sparkContext.setLogLevel("WARN")

    //计算逻辑
    compute(spark)

    spark.stop()
  }

  def compute(spark:SparkSession):Unit ={
    import spark.implicits._

    //加载过敏词汇并存储到 ArrayList 中
    val filterDataPath = "G:\\tmp\\b.txt"
    val al = new util.ArrayList[String]()
    val reader = new java.io.BufferedReader(new FileReader(new File(filterDataPath)))
    while (reader.ready()){
      val str = reader.readLine()
      str.split(" ").foreach(al.add(_))
    }
    val broadcast: Broadcast[util.ArrayList[String]] = spark.sparkContext.broadcast(al)


    spark.sparkContext.textFile("G:\\tmp\\a.txt")
      .mapPartitions(ite =>{
        // 对源数据进行切割分词,并对每个词进行校验,符合要求的词汇添加到ArrayBuffer中
        val arr = ArrayBuffer[String]()
        val filterWord:util.ArrayList[String] = broadcast.value

        ite.foreach(line => {
          line.split(" ").foreach(word => {
            if( !filterWord.contains(word) ) arr.+=(word)
          })
        })

        arr.toIterator
    })
      .collect
      .foreach(println)
  }

}