Scala FileSystems类代码示例

//设置package包名称以及导入依赖的类
package com.github.madoc.create_sbt_project.io

import java.nio.charset.Charset
import java.nio.file.{FileSystem, FileSystems, Files}
import java.util.concurrent.atomic.AtomicReference

import com.github.madoc.create_sbt_project.action.framework.ActionEnvironment
import com.github.madoc.create_sbt_project.io.Write.WriteToAppendable

import scala.io.Source

trait FileSystemSupport extends ActionEnvironment {
  def userPreferencesFileContents:Option[String]
  def writeToStandardOutput:Write
  def writeToErrorOutput:Write
}
object FileSystemSupport {
  val default:FileSystemSupport = new Default(FileSystems getDefault)
  val main:AtomicReference[FileSystemSupport] = new AtomicReference[FileSystemSupport](default)

  class Default(val fs:FileSystem) extends FileSystemSupport {
    def userPreferencesFileContents = {
      val prefsPath = fs getPath userPreferencesFilePath
      if(Files.exists(prefsPath) && Files.isRegularFile(prefsPath) && Files.isReadable(prefsPath)) {
        val source = Source.fromInputStream(Files newInputStream prefsPath, "utf-8")
        try Some(source mkString) finally source.close()
      }
      else None
    }

    val writeToErrorOutput = new WriteToAppendable(systemErr)
    val writeToStandardOutput = new WriteToAppendable(systemOut)
    def fileExists(path:String) = Files exists (fs getPath path)
    def isFileWritable(path:String) = Files isWritable (fs getPath path)
    def isDirectory(path:String) = Files isDirectory (fs getPath path)
    def mkdirs(path:String) = Files createDirectories (fs getPath path)
    def outputToFile[A](contents:A, path:String, charset:Charset)(implicit output:Output[A]) = {
      val writer = Files.newBufferedWriter(fs getPath path, charset)
      try output(contents)(new WriteToAppendable(writer)) finally writer close
    }

    protected def systemErr:Appendable = System err
    protected def systemOut:Appendable = System out
    protected def userHomeDirectory:String = System.getProperty("user.home")
    protected def userPreferencesFilePath:String =
      if(userHomeDirectory endsWith "/") userHomeDirectory + ".create-sbt-project.json"
      else userHomeDirectory + "/.create-sbt-project.json"
  }
} 

//设置package包名称以及导入依赖的类
package akka.stream.alpakka.file.scaladsl

import java.nio.file.FileSystems

import akka.NotUsed
import akka.actor.ActorSystem
import akka.stream.alpakka.file.scaladsl
import akka.stream.scaladsl.Source
import akka.stream.{ActorMaterializer, Materializer}

import scala.concurrent.duration._

object FileTailSourceSpec {

  // small sample of usage, tails the first argument file path
  def main(args: Array[String]): Unit = {
    if (args.length != 1) throw new IllegalArgumentException("Usage: FileTailSourceTest [path]")
    val path: String = args(0)

    implicit val system: ActorSystem = ActorSystem()
    implicit val materializer: Materializer = ActorMaterializer()

    // #simple-lines
    val fs = FileSystems.getDefault
    val lines: Source[String, NotUsed] = scaladsl.FileTailSource.lines(
      path = fs.getPath(path),
      maxLineSize = 8192,
      pollingInterval = 250.millis
    )

    lines.runForeach(line => System.out.println(line))
    // #simple-lines
  }

} 

//设置package包名称以及导入依赖的类
package akka.stream.alpakka.file.scaladsl

import java.nio.file.FileSystems

import akka.actor.ActorSystem
import akka.stream.ActorMaterializer

import scala.concurrent.duration._

object DirectoryChangesSourceSpec {
  def main(args: Array[String]): Unit = {
    if (args.length != 1) throw new IllegalArgumentException("Usage: DirectoryChangesSourceTest [path]")
    val path: String = args(0)

    implicit val system: ActorSystem = ActorSystem()
    implicit val materializer = ActorMaterializer()

    // #minimal-sample
    val fs = FileSystems.getDefault
    val changes = DirectoryChangesSource(fs.getPath(path), pollInterval = 1.second, maxBufferSize = 1000)
    changes.runForeach {
      case (path, change) => println("Path: " + path + ", Change: " + change)
    }
    // #minimal-sample
  }
} 

//设置package包名称以及导入依赖的类
package com.github.madoc.create_sbt_project.io

import java.nio.file.FileSystems

import org.scalatest.{FreeSpec, Matchers}

class FileSystemSupportTest extends FreeSpec with Matchers {
  "user home directory returns the system property" in {
    val fs = new FileSystemSupport.Default(FileSystems getDefault) {
      def exposeUserHomeDirectory = userHomeDirectory
    }
    fs.exposeUserHomeDirectory should be (System getProperty "user.home")
  }
  "path of user preferences path is composed correctly even when user home ends in a slash" in {
    val fs = new FileSystemSupport.Default(FileSystems getDefault) {
      def exposeUserPreferencesFilePath = super.userPreferencesFilePath
      override protected def userHomeDirectory = "/home/user/"
    }
    fs.exposeUserPreferencesFilePath should be ("/home/user/.create-sbt-project.json")
  }
} 

//设置package包名称以及导入依赖的类
import org.scalatest._

class StreamingTest extends FlatSpec with Matchers {
  "Hello" should "have tests" in {

    import java.nio.ByteBuffer
    import java.nio.channels.ReadableByteChannel
    import java.nio.file.{FileSystems, Files}

      @scala.annotation.tailrec
      def countStuff(
                      buffer: ByteBuffer,
                      byteChannel: ReadableByteChannel,
                      oldcount: BigInt
                    ): BigInt = {

        val newCount = byteChannel.read(buffer)

        if (newCount == -1) {
          println("Done reading")
          oldcount
        } else {
          println(s"Read ${newCount + oldcount} bytes!")
          buffer.clear()
          countStuff(buffer, byteChannel, oldcount + newCount)
        }
      }

      Seq("/i/p/hmrc/attachments/README.md").foreach{(fileWithFullPath: String) =>
        val byteChannel =
          Files.newByteChannel(FileSystems.getDefault().getPath(fileWithFullPath))

        countStuff(ByteBuffer.allocateDirect(1024), byteChannel, 0)

        byteChannel.close()
      }
    }

} 

//设置package包名称以及导入依赖的类
package swave.core.io.files

import java.io.File
import java.nio.channels.FileChannel
import java.nio.file.{FileSystems, Files, Path, StandardOpenOption}

import scala.util.control.NonFatal
import com.typesafe.config.Config
import swave.core.impl.util.SettingsCompanion
import swave.core.io.Bytes
import swave.core.macros._

object FileIO extends SpoutFromFiles with DrainToFiles {

  lazy val userHomePath: Path = FileSystems.getDefault.getPath(System getProperty "user.home")

  def resolveFileSystemPath(pathName: String): Path =
    if (pathName.length >= 2 && pathName.charAt(0) == '~' && pathName.charAt(1) == File.separatorChar) {
      userHomePath.resolve(pathName substring 2)
    } else FileSystems.getDefault.getPath(pathName)

  val WriteCreateOptions: Set[StandardOpenOption] = {
    import StandardOpenOption._
    Set(CREATE, TRUNCATE_EXISTING, WRITE)
  }

  final case class Settings(defaultFileReadingChunkSize: Int, defaultFileWritingChunkSize: Int) {
    requireArg(defaultFileReadingChunkSize > 0, "`defaultFileChunkSize` must be > 0")
    requireArg(defaultFileWritingChunkSize >= 0, "`defaultFileWritingChunkSize` must be >= 0")

    def withDefaultFileReadingChunkSize(defaultFileReadingChunkSize: Int) =
      copy(defaultFileReadingChunkSize = defaultFileReadingChunkSize)
    def withDefaultFileWritingChunkSize(defaultFileWritingChunkSize: Int) =
      copy(defaultFileWritingChunkSize = defaultFileWritingChunkSize)
  }

  object Settings extends SettingsCompanion[Settings]("swave.core.file-io") {
    def fromSubConfig(c: Config): Settings =
      Settings(
        defaultFileReadingChunkSize = c getInt "default-file-reading-chunk-size",
        defaultFileWritingChunkSize = c getInt "default-file-writing-chunk-size")
  }

  def writeFile[T: Bytes](fileName: String, data: T): Unit = writeFile(resolveFileSystemPath(fileName), data)
  def writeFile[T: Bytes](file: File, data: T): Unit       = writeFile(file.toPath, data)
  def writeFile[T: Bytes](path: Path, data: T, options: StandardOpenOption*): Unit = {
    implicit def decorator(value: T): Bytes.Decorator[T] = Bytes.decorator(value)
    Files.write(path, data.toArray, options: _*)
    ()
  }

  def readFile[T: Bytes](fileName: String): T = readFile(resolveFileSystemPath(fileName))
  def readFile[T: Bytes](file: File): T       = readFile(file.toPath)
  def readFile[T: Bytes](path: Path): T       = implicitly[Bytes[T]].apply(Files.readAllBytes(path))

  private[io] def quietClose(channel: FileChannel): Unit =
    try channel.close()
    catch { case NonFatal(_) ? }
} 

//设置package包名称以及导入依赖的类
package de.frosner.broccoli.templates

import java.nio.file.{FileSystems, Files, Path}

import de.frosner.broccoli.models.{ParameterInfo, Template}
import org.specs2.mutable.Specification

import scala.io.Source

class DirectoryTemplateSourceSpec extends Specification with TemporaryTemplatesContext {
  "Loading templates from a directory" should {

    "fail if the passed directory is not directory" in {
      val directory = FileSystems.getDefault.getPath("not-a-directory")
      Files.exists(directory) must beFalse

      new DirectoryTemplateSource(directory.toString).loadTemplates must throwA(
        new IllegalStateException(s"Templates directory ${directory.toAbsolutePath} is not a directory"))
    }

    "parse fully specified templates correctly" in { templatesDirectory: Path =>
      val templates =
        new DirectoryTemplateSource(templatesDirectory.toString).loadTemplates()

      templates must contain(
        beEqualTo(Template(
          "curl",
          Source.fromFile(templatesDirectory.resolve("curl/template.json").toFile).mkString,
          "A periodic job that sends an HTTP GET request to a specified address every minute.",
          Map("URL" -> ParameterInfo("URL", None, Some("localhost:8000"), None),
              "enabled" -> ParameterInfo("enabled", None, Some("true"), None))
        ))).exactly(1)
    }

    "use a default template description if not provided" in { templatesDirectory: Path =>
      val templates =
        new DirectoryTemplateSource(templatesDirectory.toString).loadTemplates()
      templates.map(_.description) must contain(beEqualTo("curl-without-decription template")).exactly(1)
    }

    "use default parameters if meta file is not provided" in { templatesDirectory: Path =>
      val templates =
        new DirectoryTemplateSource(templatesDirectory.toString).loadTemplates()
      templates.map(_.parameterInfos) must contain(empty).exactly(1)
    }

    "not contain templates that failed to parse" in { templatesDirectory: Path =>
      val templates =
        new DirectoryTemplateSource(templatesDirectory.toString).loadTemplates()

      templates.map(_.id) must not contain beEqualTo("broken-template")
    }

  }
} 

//设置package包名称以及导入依赖的类
package net.aruneko.redmineforspigot

import java.nio.file.{Files, FileSystems}

import org.bukkit.command.CommandSender
import org.bukkit.plugin.java.JavaPlugin

import scala.util.control.Exception._


class Configuration(p: JavaPlugin) {

  // ?????????????????????????????
  if (!p.getDataFolder.exists()) {
    p.getDataFolder.mkdirs()
  }

  // ???????????????
  val configFileName = "config.yml"
  val configFilePath = FileSystems.getDefault.getPath(p.getDataFolder.toString, configFileName)

  // ?????????????????????????
  if (!Files.exists(configFilePath)) {
    p.getLogger.info("config.yml is not found, creating.")
    p.saveDefaultConfig()
  } else {
    p.getLogger.info("config.yml is found, loading.")
  }

  // ???????????
  val conf = p.getConfig

  // RedmineURL???
  val url = conf.getString("url")

  def getApiKey(sender: CommandSender): MyEither[String, String] = {
    val apiKey = catching(classOf[NullPointerException]) opt conf.getString("apiKeys." + sender.getName)

    apiKey match {
      case None =>
        Left("NOTE: You don't set API Key.")
      case Some(key) =>
        Right(key)
    }
  }

  def setApiKey(sender: CommandSender, apiKey: String): Boolean = {
    if (apiKey.matches("[a-f0-9]{40}")) {
      conf.set("apiKeys." + sender.getName, apiKey)
      p.saveConfig
      sender.sendMessage("Saved configuration file.")
    } else {
      sender.sendMessage("Incorrect API Key format.")
    }
    true
  }
} 

//设置package包名称以及导入依赖的类
package hyponome.test

import java.nio.file.{FileSystem, FileSystems, Path}

import hyponome._

trait Data {

  private val fs: FileSystem = FileSystems.getDefault

  val testPDF: Path                      = fs.getPath(getClass.getResource("/test.pdf").getPath)
  val testPDFHash: FileHash              = FileHash.fromHex("eba205fb9114750b2ce83db62f9c2a15dd068bcba31a2de32d8df7f7c8d85441")
  val testPDFName: Option[String]        = Some(testPDF.toFile.getName)
  val testPDFContentType: Option[String] = Some("application/octet-stream")
  val testPDFLength: Long                = testPDF.toFile.length
  val testUser: User                     = User("Alice", "[email protected]")
  val testMetadata: Option[Metadata]     = Some(Metadata("This is some metadata"))
  val testMessageAdd: Option[Message]    = Some(Message("I'm adding this file"))
  val testMessageRemove: Option[Message] = Some(Message("I'm removing this file"))

  case class TestData(file: Path,
                      hash: FileHash,
                      name: Option[String],
                      contentType: Option[String],
                      length: Long,
                      metadata: Option[Metadata],
                      user: User,
                      message: Option[Message])

  val testData = TestData(testPDF, testPDFHash, testPDFName, testPDFContentType, testPDFLength, testMetadata, testUser, testMessageAdd)

  val testFile = File(testPDFHash, testPDFName, testPDFContentType, testPDFLength, testMetadata)
} 

//设置package包名称以及导入依赖的类
package code

import java.nio.file.FileSystems

import akka.NotUsed
import akka.stream.IOResult
import akka.stream.scaladsl.{FileIO, Flow, Framing, Keep, RunnableGraph}
import akka.util.ByteString

import scala.concurrent.Future

object BlueprintExample extends AkkaStreamsApp {
  val file = this.getClass.getClassLoader.getResource("current_inventory.csv")
  val inPath = FileSystems.getDefault.getPath(file.getPath)
  val outPath = FileSystems.getDefault.getPath("no_inventory.csv")
  val fileSource = FileIO.fromPath(inPath)
  val fileSink = FileIO.toPath(outPath)

  val csvHandler: Flow[String, List[String], NotUsed] =
    Flow[String]
      .drop(1)
      .map(_.split(",").toList)
      .log("csvHandler")

  val lowInventoryFlow: RunnableGraph[Future[IOResult]] =
    fileSource
      .via(Framing.delimiter(ByteString("\n"), Integer.MAX_VALUE))
      .map(_.utf8String)
      .log("Before CSV Handler")
      .via(csvHandler)
      .filter(list => list(2).toInt == 0)
      .log("After filter")
      .map { list =>
        ByteString(list.mkString(",")) ++ ByteString("\n")
      }.toMat(fileSink)(Keep.right)

  override def akkaStreamsExample: Future[_] =
    lowInventoryFlow.run()

  runExample
}