如何将txt文件转换为scala.collection.mutable.map [string，int]

Question

我花了很多时间，我没有办法将以下txt转换为scala.collection.mutable.map.map [string，int]

"Becky Smith",12
"John Smith",42
"John",27
"Jones",36
"Matt Jones",48
"Matthew",21
"Rebecca",3
"Sarah Jones",18
"Sarah",33
"Smith",30
-73ef638e:15c66949809:-7ffc,45
-73ef638e:15c66949809:-7ffd,34
-73ef638e:15c66949809:-7ffe,9
-73ef638e:15c66949809:-7fff,39
http://somewhere/JohnSmith/,40
http://somewhere/MattJones/,46
http://somewhere/RebeccaSmith/,10
http://somewhere/SarahJones/,16
http://www.w3.org/2001/vcard-rdf/3.0#FN,47
http://www.w3.org/2001/vcard-rdf/3.0#Family,35
http://www.w3.org/2001/vcard-rdf/3.0#Given,32
http://www.w3.org/2001/vcard-rdf/3.0#N,44

首先，我尝试以正常方式读取文件，但是我无法将行添加到地图[string，int]，您有一些想法吗？

Answer 1

在 scala 中，您不需要 Mutable Map 即可附加，您可以将映射到 new Collection 包含tuple类型(如下：(t(0), t(1).toInt)(，最后将此collection转换为 map ，也许是：

Source.fromFile(new File("test.txt")).getLines().map(_.split(",")).map(t => (t(0), t(1).toInt)).toMap

Answer 2

您可以简单地使用input text split CC_5，然后将splitted text转换为mutable hashmap。结果将是hashmaps的集合，即rdd of hashmaps

代码如下

val data = sc.textFile("path to your text file")
val rddMaps = data.map(line => line.split(",")).map(array => collection.mutable.HashMap[String, Int](array(0)->array(1).toInt))