Scala ZipOutputStream类代码示例

//设置package包名称以及导入依赖的类
package aws.s3

import java.io._
import java.util.zip.{ZipEntry, ZipOutputStream}

import aws.Interpreter.ErrorsOr
import cats.data.NonEmptyList
import cats.instances.either._
import cats.instances.list._
import cats.syntax.traverse._
import com.ovoenergy.comms.model.CommManifest
import logic.TemplateOp._

object S3Operations {

  def downloadTemplateFiles(s3ClientWrapper: AmazonS3ClientWrapper,
                            commManifest: CommManifest,
                            bucketName: String): Either[String, TemplateFiles] = {
    val prefix   = buildPrefix(commManifest)
    val fileKeys = s3ClientWrapper.listFiles(bucketName, prefix).right
    fileKeys.flatMap { keys =>
      val result = keys.toList.traverseU { absKey =>
        val file = s3ClientWrapper.downloadFile(bucketName, absKey).right

        val pair: Either[String, (String, Array[Byte])] = file map { f =>
          val strippedKey = absKey.stripPrefix(prefix).dropWhile(_ == '/')
          (strippedKey, f)
        }
        pair
      }
      result.right.map(_.toMap)
    }
  }

  private def buildPrefix(commManifest: CommManifest) = {
    s"${commManifest.commType.toString.toLowerCase}/${commManifest.name}/${commManifest.version}"
  }

  type ByteArray = Array[Byte]

  def compressFiles(templateFiles: TemplateFiles): ErrorsOr[ByteArray] = {
    val baos = new ByteArrayOutputStream()
    try {
      val zip = new ZipOutputStream(baos)
      try {
        templateFiles.foreach {
          case (fileName, file) =>
            zip.putNextEntry(new ZipEntry(fileName))
            zip.write(file)
            zip.closeEntry()
        }
      } finally {
        zip.close()
      }
      val result = baos.toByteArray
      Right(result)
    } catch {
      case e: Throwable => Left(NonEmptyList.of(s"Failed to compress template files: ${e.getMessage}"))
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.s3dropbox.lambda

import java.io.{File, FileInputStream, FileOutputStream}
import java.util.zip.{ZipEntry, ZipOutputStream}

import com.s3dropbox.lambda.ZipFileIterator.ZipFileEntry


class ZipFileIteratorSpec extends UnitSpec {

  describe("When given a valid zip file with more than one compressed file") {
    it("should iterate over the compressed files and provide their file name and contents") {
      val entries: Array[(String, Array[Byte])] =
        (1 to 5)
          .map((fileNum: Int) => {
            (s"file_$fileNum", s"This is the contents of file $fileNum".getBytes)
          })
          .toArray
      runZipFileTest(entries)
    }
  }

  describe("when given a zip file containing a single large 1MB file") {
    it("should decompress the single large file") {
      val entries: Array[(String, Array[Byte])] = Array(
        ("some_file", (1 to 1024 * 1024).map(_.toByte).toArray)
      )
      runZipFileTest(entries)
    }
  }

  def runZipFileTest(entries: Array[(String, Array[Byte])]): Unit = {
    var index: Int = 0
    val zipFileIter: ZipFileIterator = new ZipFileIterator(new FileInputStream(zipFile(entries)))
    zipFileIter.foreach((zipFileEntry: ZipFileEntry) => {
      assert(zipFileEntry.filename == entries(index)._1)
      assert(zipFileEntry.data sameElements entries(index)._2)
      index += 1
    })
    zipFileIter.close()
  }

  def zipFile(entries: Array[(String, Array[Byte])]): File = {
    val temp: File = File.createTempFile("temp-zip-file", ".zip")
    temp.deleteOnExit()

    val zos: ZipOutputStream = new ZipOutputStream(new FileOutputStream(temp))
    entries.foreach((entry: (String, Array[Byte])) => {
      val filename: String = entry._1
      val contents: Array[Byte] = entry._2

      val zentry: ZipEntry = new ZipEntry(filename)
      zos.putNextEntry(zentry)
      zos.write(contents)
      zos.closeEntry()
    })
    zos.close()

    temp
  }
} 

//设置package包名称以及导入依赖的类
package anchorman.docx

import anchorman.media.MediaFile

import java.io.OutputStreamWriter
import java.util.zip.{ZipEntry, ZipOutputStream}

import scala.xml.{MinimizeMode, NodeSeq, XML}

object ZipImplicits {
  implicit class ZipOutputStreamOps(out: ZipOutputStream) {
    def writeXmlFile(path: String, nodes: NodeSeq): Unit = {
      out.putNextEntry(new ZipEntry(path))

      val writer = new OutputStreamWriter(out)
      try XML.write(writer, nodes.head, "UTF-8", true, null, MinimizeMode.Always)
      finally writer.flush()
    }

    def writeMediaFile(path: String, file: MediaFile): Unit = {
      out.putNextEntry(new ZipEntry(path))
      try out.write(file.content)
      finally out.flush()
    }
  }
} 

//设置package包名称以及导入依赖的类
package flaky.history

import java.io.{File, FileInputStream, FileOutputStream}
import java.util.zip.{ZipEntry, ZipOutputStream}

object Zip {


  def compressFolder(zipFilePath: File, folder: File): Unit = {
    import java.io.File
    def recursiveListFiles(f: File): Array[File] = {
      val these = f.listFiles
      these.filter(_.isFile) ++ these.filter(_.isDirectory).flatMap(recursiveListFiles)
    }

    val toList = recursiveListFiles(folder).toList
    compress(zipFilePath, folder, toList)
  }

  def compress(zipFilePath: File, root: File, files: List[File]): Unit = {
    val zip = new ZipOutputStream(new FileOutputStream(zipFilePath))
    val rootPath = root.getAbsolutePath
    try {
      for (file <- files) {
        zip.putNextEntry(new ZipEntry(file.getAbsolutePath.substring(rootPath.length)))
        val in = new FileInputStream(file)
        try {
          Iterator
            .continually(in.read())
            .takeWhile(_ > -1)
            .foreach(zip.write)
        } finally {
          in.close()
        }
        zip.closeEntry()
      }
    }
    finally {
      zip.close()
    }
  }
}