Scala FileFilter类代码示例

//设置package包名称以及导入依赖的类
package pi.jenkins.build

import java.io.{File, FileFilter}

import com.typesafe.config.{Config, ConfigFactory}
import org.slf4j.LoggerFactory


object Configuration {

  
  private val LOG = LoggerFactory.getLogger(getClass)

  private[this] def configDir =
    sys.props.get("JENKINS_CONFIG_HOME").map {
      fname ? new File(fname)
    } getOrElse {
      val home = sys.env("HOME")
      new File(new File(home), ".jenkins-pi")
    }

  private lazy val cfg: Config = {
    val c = {
      val dir = configDir
      LOG.trace("Reading files from {}", configDir)
      if (dir.exists()) {
        dir.listFiles(new FileFilter {
          override def accept(pathname: File): Boolean =
            pathname.getName.endsWith(".conf") || pathname.getName.endsWith(".properties")
        }).foldLeft(ConfigFactory.empty()) {
          case (lc, src) ?
            LOG.trace("Loading configuration from '{}'", src)
            lc.withFallback(ConfigFactory.parseFile(src))
        }
      } else {
        ConfigFactory.empty()
      }
    }.withFallback(ConfigFactory.load("jenkins_config"))
      .withFallback(ConfigFactory.load("jenkins_config_reference"))
      .withFallback(ConfigFactory.load())
    LOG.trace(s"Config rendered as ${c.root().render()}")
    c
  }

  object Api {

    lazy val Username = cfg.getString("pi.jenkins.api.username")

    lazy val AccessKey = cfg.getString("pi.jenkins.api.accesskey")

  }


} 

//设置package包名称以及导入依赖的类
package geotrellis.migration.core.backend

import geotrellis.migration.core.AttributeStoreTools
import geotrellis.spark._
import geotrellis.spark.io.file.{FileAttributeStore, FileLayerHeader}
import geotrellis.spark.io.file.FileAttributeStore._
import org.apache.commons.io.filefilter.WildcardFileFilter
import spray.json._
import java.io.FileFilter

import geotrellis.migration.cli.{FileArgs, TransformArgs}

class FileTools(val attributeStore: FileAttributeStore) extends AttributeStoreTools {
  val format = "file"
  lazy val layerIds = attributeStore.layerIds

  def readAll[T: JsonFormat](layerId: Option[LayerId], attributeName: Option[String]): List[(Option[LayerId], T)] = {
    val filter: FileFilter = (layerId, attributeName) match {
      case (Some(id), None)       => new WildcardFileFilter(s"${id.name}${SEP}${id.zoom}${SEP}*.json")
      case (None, Some(attr))     => new WildcardFileFilter(s"*${SEP}${attr}.json")
      case (Some(id), Some(attr)) => new WildcardFileFilter(s"${id.name}${SEP}${id.zoom}${SEP}${attr}.json")
      case _                      => new WildcardFileFilter("*.json")
    }

    attributeStore.attributeDirectory
      .listFiles(filter)
      .map(attributeStore.read[T])
      .map { case (id, v) => Some(id) -> v }
      .toList
  }

  def layerMove(layerName: String, args: TransformArgs): Unit = genericLayerMove[FileLayerHeader](layerName, args)
}

object FileTools {
  def apply(args: FileArgs) = new FileTools(new FileAttributeStore(args.rootPath))
} 

//设置package包名称以及导入依赖的类
package controllers

import java.io.{FileFilter, File}
import java.nio.file.{Paths, Path, Files}
import javax.inject._

import play.api.libs.json._
import play.api.mvc._

import scala.concurrent.ExecutionContext

@Singleton
class DirectoryTreeController @Inject()()(implicit exec: ExecutionContext) extends Controller {
  implicit val fileAsNode = new Writes[File] {
    def writes(file: File) = {
      Json.obj (
        "path" -> file.getAbsolutePath,
        "name" -> file.getName,
        "isDirectory" -> file.isDirectory
      )
    }
  }

  private val fileFilter = new FileFilter {
    def accept(pathname: File): Boolean = {
      (!pathname.isHidden) && pathname.canRead
    }
  }

  def getDirectory(directoryOpt: Option[String]) = Action {
    val directory = {
      val directoryOrHash = directoryOpt.getOrElse("#")
      if (directoryOrHash == "#")
        "/"
      else
        directoryOrHash
    }
    val path = Paths.get(directory)
    if (!Files.isDirectory(path)) {
      NotFound(s"$directory is not a valid directory")
    } else {
      Ok(
        Json.obj (
          "path" -> path.toFile.getAbsolutePath,
          "items" -> Json.toJson(path.toFile.listFiles(fileFilter))
        )
      )
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.hindog.grid

import java.io.{File, FileFilter}
import java.net.{JarURLConnection, URL, URLDecoder}

import scala.collection.JavaConverters._
import scala.collection._


  def explodeClasspath(classpath: String = System.getProperty("java.class.path")): Array[URL] = {
    classpath.split(File.pathSeparator).flatMap(file => {
      if (file.endsWith(".jar")) {
        try {
          val url = new URL("jar:file:" + file + "!/META-INF/MANIFEST.MF")
          val jarConnection = url.openConnection().asInstanceOf[JarURLConnection]
          val manifest = new java.util.jar.Manifest(jarConnection.getInputStream)
          manifest.getMainAttributes.getValue("Class-Path").split("\\s+").map(f => URLDecoder.decode(f, "UTF-8")).toSeq
        } catch {
          case ex: Exception => Seq(file)
        }
      } else if (file.endsWith("*")) {
        new File(file.stripSuffix("*")).listFiles(new FileFilter {
          override def accept(pathname: File): Boolean = pathname.getName.endsWith(".jar") || pathname.getName.endsWith(".xml") || pathname.getName.endsWith(".properties") || pathname.getName.endsWith(".class")
        }).map(_.toString).toSeq
      } else {
        Seq(file)
      }
    }).map(s => new File(s).toURI.toURL)
  }
} 

//设置package包名称以及导入依赖的类
import java.io.{File, FileFilter}

import com.cascomio.tesseract.example.{Config, DefaultPdf2PngConverter}
import org.scalatest.{BeforeAndAfterAll, Matchers, WordSpecLike}

class DefaultPdf2PngConverterTests extends WordSpecLike
  with BeforeAndAfterAll
  with Matchers {
  "A pdf to png converter" should {
    "convert the provided file to png" in {
      val converter = new DefaultPdf2PngConverter
      val filePath = getClass.getResource("/menu.pdf").getPath
      val parentFilePath = new File(filePath).getParent
      val config = new Config(filePath, filePath)

      converter.convert(config)

      val createdFiles = new File(parentFilePath).listFiles(new FileFilter {
        override def accept(path: File): Boolean = {
          val pathname = path.getAbsolutePath
          pathname.startsWith(config.filePath) &&
            pathname.toLowerCase().endsWith("png")
        }
      })
      assert(createdFiles.size > 0, "No png files created")
    }
  }
}