scala - 制作文件夹/文件并在Scala中写入它们？

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How to write to a file in Scala?

（18个回答）


7年前关闭。





如何在Scala中制作文件和文件夹并写入文件？我了解它在其他语言中的工作方式，但是Scala有点棘手：/

这与另一个问题不同，因为它还询问如何在Scala中创建目录和文件。

最佳答案

保罗·菲利普斯（Paul Phillips）只是在ML上附带了一个括号，他说：“我写了一个库，对一堆java.nio.file.Path进行了包装”，因此您应该拭目以待。

同时，他先前在java.io上的工作像一种躁动不安的精神徘徊，但现在却困扰着他：

scala> import reflect.io._
import reflect.io._

scala> val f = File("my-test.txt")
f: scala.reflect.io.File = my-test.txt

scala> f writeAll ("hello", ",", " ", "world", "\n")

scala> :q
apm@mara:~/tmp$ cat my-test.txt
hello, world

也有 Path和 Directory的抽象。

scala> val d = Directory(".")
d: scala.reflect.io.Directory = .

scala> d.list
res0: Iterator[scala.reflect.io.Path] = non-empty iterator

scala> d.deepList()
res2: Iterator[scala.reflect.io.Path] = non-empty iterator

scala> d.deepFiles.toList
res4: List[scala.reflect.io.File] = List(./mkarray.scala, ./for29.scala, ./nofunc-wrapped.scala, ./inlined.scala, ./xmlex.scala, ./pet.scala, ./lookup.scala, ./CompilerTool.scala, ./badvargs.scala, ./tz0.scala, ./discontinuations.jar, ./serious.scala, ./badjunk.scala, ./version.scala, ./shapeless_2.11.jar, ./callbacks.scala, ./delayed.scala, ./privctor0.scala, ./nestedtags.scala, ./hw-repl.scala, ./schema-one.txt, ./tstest.scala, ./badimp.scala, ./matchprim.scala, ./sxemata-all.txt, ./arrow.scala, ./continuations2.jar, ./inliner.scala, ./oneq.scala, ./impmag.scala, ./enumuser.scala, ./auto.save, ./xmlregex.scala, ./strtyp.scala, ./orelse.scala, ./scalac-plugin.xml, ./futuremap.scala, ./applied.save, ./looker.scala, ./pat1, ./sounds.scala, ./shapeless_2.10.jar, ./funkstr.scala, ./stupid....

scala> val p = Path(".")
p: scala.reflect.io.Path = .

scala> val f = p / "mkarray.scala"
f: scala.reflect.io.Path = ./mkarray.scala

关于scala - 制作文件夹/文件并在Scala中写入它们？ ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17708042/

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Answer 1

保罗·菲利普斯（Paul Phillips）只是在ML上附带了一个括号，他说：“我写了一个库，对一堆java.nio.file.Path进行了包装”，因此您应该拭目以待。

同时，他先前在java.io上的工作像一种躁动不安的精神徘徊，但现在却困扰着他：

scala> import reflect.io._
import reflect.io._

scala> val f = File("my-test.txt")
f: scala.reflect.io.File = my-test.txt

scala> f writeAll ("hello", ",", " ", "world", "\n")

scala> :q
apm@mara:~/tmp$ cat my-test.txt
hello, world

也有 Path和 Directory的抽象。

scala> val d = Directory(".")
d: scala.reflect.io.Directory = .

scala> d.list
res0: Iterator[scala.reflect.io.Path] = non-empty iterator

scala> d.deepList()
res2: Iterator[scala.reflect.io.Path] = non-empty iterator

scala> d.deepFiles.toList
res4: List[scala.reflect.io.File] = List(./mkarray.scala, ./for29.scala, ./nofunc-wrapped.scala, ./inlined.scala, ./xmlex.scala, ./pet.scala, ./lookup.scala, ./CompilerTool.scala, ./badvargs.scala, ./tz0.scala, ./discontinuations.jar, ./serious.scala, ./badjunk.scala, ./version.scala, ./shapeless_2.11.jar, ./callbacks.scala, ./delayed.scala, ./privctor0.scala, ./nestedtags.scala, ./hw-repl.scala, ./schema-one.txt, ./tstest.scala, ./badimp.scala, ./matchprim.scala, ./sxemata-all.txt, ./arrow.scala, ./continuations2.jar, ./inliner.scala, ./oneq.scala, ./impmag.scala, ./enumuser.scala, ./auto.save, ./xmlregex.scala, ./strtyp.scala, ./orelse.scala, ./scalac-plugin.xml, ./futuremap.scala, ./applied.save, ./looker.scala, ./pat1, ./sounds.scala, ./shapeless_2.10.jar, ./funkstr.scala, ./stupid....

scala> val p = Path(".")
p: scala.reflect.io.Path = .

scala> val f = p / "mkarray.scala"
f: scala.reflect.io.Path = ./mkarray.scala