Scala PrintStream类代码示例

//设置package包名称以及导入依赖的类
package logoon.adapters.console

import java.io.{ OutputStream, PrintStream }

import logoon._

class OutputStreamLoggerAdapter(output: OutputStream) extends LoggerAdapter {
  override def log(name: String, level: LogLevel, message: => String, context: Map[String, String]): Unit = {
    output.write("[%-5s] %s\n".format(level, message).getBytes())
    context.foreach { case (key, value) => output.write("%25s = %s\n".format(key, value).getBytes) }
  }
  override def log(name: String, level: LogLevel, message: => String, throwable: => Throwable, context: Map[String, String]): Unit = {
    log(name, level, message, context)
    throwable.printStackTrace(new PrintStream(output))
  }
}

object ConsoleLoggerAdapter extends OutputStreamLoggerAdapter(System.out)

class InMemoryLogLevelConfig extends LogLevelConfig {
  var levels: Map[String, LogLevel] = Map("" -> LogLevel.OFF)
  override def logLevel(name: String): LogLevel =
    levels.get(name) match {
      case Some(level) => level
      case None        => logLevel(name.substring(0, name.length - 1))
    }
  override def setLogLevel(name: String, level: LogLevel): Unit = levels += (name -> level)
} 

//设置package包名称以及导入依赖的类
package org.arnoldc

import java.io.{PrintStream, ByteArrayOutputStream}

class ByteCodeExecutor extends ClassLoader {
  val originalOutputStream = System.out

  def getOutput(bytecode: Array[Byte], className: String): String = {

    val outputRedirectionStream = new ByteArrayOutputStream()

   System.setOut(new PrintStream(outputRedirectionStream))

    invokeMainMethod(bytecode, className)
    System.setOut(originalOutputStream)
    outputRedirectionStream.toString
  }

  def invokeMainMethod(bytecode: Array[Byte], className: String) = {
    val template = new ByteCodeExecutor()
    val testClass = template.defineClass(className, bytecode, 0, bytecode.length)
    val testInstance = testClass.newInstance().asInstanceOf[ {def main(test: Array[String])}]
    testInstance.main(null)
  }
} 

//设置package包名称以及导入依赖的类
package hu.ssh.progressbar.console

import java.io.{ByteArrayOutputStream, PrintStream}

import com.google.common.base.{Splitter, Strings}
import com.google.common.collect.Iterables
import org.scalatest.{FlatSpec, Matchers}


class ConsoleProgressBarTest extends FlatSpec with Matchers {
  "ProgressBar" should "output as expected" in {
    val outputstream = new ByteArrayOutputStream
    try {
      val progressBar = ConsoleProgressBar.on(new PrintStream(outputstream)).withFormat(":percent")
      progressBar.tick(0)
      assert(getLastOutput(outputstream.toString) == "  0.00")
      progressBar.tick(25)
      assert(getLastOutput(outputstream.toString) == " 25.00")
      progressBar.tick(30)
      assert(getLastOutput(outputstream.toString) == " 55.00")
      progressBar.tick(44)
      assert(getLastOutput(outputstream.toString) == " 99.00")
      progressBar.tickOne()
      assert(getLastOutput(outputstream.toString) == "100.00")
    } finally outputstream.close()
  }

  private def getLastOutput(string: String): String = {
    if (Strings.isNullOrEmpty(string)) return string
    val outputs = Splitter.on(ConsoleProgressBar.CARRIAGE_RETURN).omitEmptyStrings.split(string)
    Iterables.getLast(outputs)
  }
} 

//设置package包名称以及导入依赖的类
package xyz.hyperreal

import java.io.{PrintStream, ByteArrayOutputStream}

package object gerbil {
	def capture( code: String ) = {
		val buf = new ByteArrayOutputStream
		
		Console.withOut( new PrintStream(buf) )( Gerbil.run(code) )
		buf.toString.trim
	}
	
	def captureReturn( code: String ) = {
		val buf = new ByteArrayOutputStream
		val ret = Console.withOut( new PrintStream(buf) )( Gerbil.run(code) )
		
		(ret, buf.toString.trim)
	}
} 

//设置package包名称以及导入依赖的类
package xyz.hyperreal.energize

import java.io.{PrintStream, ByteArrayOutputStream}


object Test {

  def dbconnect = Energize.dbconnect( "H2", "org.h2.Driver", "jdbc:h2:mem:", "sa", "" )

	def capture( code: String ) = {
		val buf = new ByteArrayOutputStream
		val (c, s, d) = dbconnect
		val key = AUTHORIZATION.getString( "key" )

		Console.withOut( new PrintStream(buf) )( Energize.configure(io.Source.fromString(code), c, s, d, key) )
		c.close
		buf.toString.trim
	}
	
	def captureReturn( code: String ) = {
		val buf = new ByteArrayOutputStream
		val (c, s, d) = dbconnect
		val key = AUTHORIZATION.getString( "key" )
		val ret = Console.withOut( new PrintStream(buf) )( Energize.configure(io.Source.fromString(code), c, s, d, key) )

		c.close
		(ret, buf.toString.trim)
	}
} 

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

import java.io.{ByteArrayOutputStream, PrintStream}

class ByteCodeExecutor extends ClassLoader {
  val originalOutputStream = System.out

  def getOutput(bytecode: Array[Byte], className: String): String = {

    val outputRedirectionStream = new ByteArrayOutputStream()

   System.setOut(new PrintStream(outputRedirectionStream))

    invokeMainMethod(bytecode, className)
    System.setOut(originalOutputStream)
    outputRedirectionStream.toString
  }

  def invokeMainMethod(bytecode: Array[Byte], className: String) = {
    val template = new ByteCodeExecutor()
    val testClass = template.defineClass(className, bytecode, 0, bytecode.length)
    val testInstance = testClass.newInstance().asInstanceOf[ {def main(test: Array[String])}]
    testInstance.main(null)
  }
} 

//设置package包名称以及导入依赖的类
package delorean.commands

import java.io.{ByteArrayOutputStream, PrintStream}
import java.nio.file._

import delorean._
import org.junit.Assert._
import org.junit._

import scala.util.Try

class ConfigTest {

    val outContent = new ByteArrayOutputStream()

    /**
      * This will redirect the output stream into outContent and we can access the print output from it.
      */
    @Before
    def setUpStreams(): Unit = System.setOut(new PrintStream(outContent))

    /**
      * Resetting the stream to null.
      */
    @After
    def cleanUpStreams(): Unit = System.setOut(null)

    @Test
    def configTest(): Unit = {
        // Adding a new key value pair to configuration
        Config(List("Marty", "McFly"))

        // Calling list to display the current configuration
        Config(List("--list"))
        assertEquals("Marty = McFly", outContent.toString.trim)
    }
}

object ConfigTest {
    // Create CONFIG file. We also create TIME_MACHINE as we need the parent directory to be present
    @BeforeClass
    def setUp(): Unit = {
        Try(Files.createDirectory(Paths.get(TIME_MACHINE)))
        Try(Files.createFile(Paths.get(CONFIG)))
    }

    // Delete CONFIG file and the parent directory.
    @AfterClass
    def tearDown(): Unit = {
        Try(Files.delete(Paths.get(CONFIG)))
        Try(Files.delete(Paths.get(TIME_MACHINE)))
    }

} 

//设置package包名称以及导入依赖的类
package org.argus.jc.incremental.jawa
package remote

import java.io.{PrintStream, PrintWriter}


class ClientEventProcessor(client: Client) {
  def process(event: Event) {
    event match {
      case MessageEvent(kind, text, source, line, column) =>
        client.message(kind, text, source, line, column)

      case ProgressEvent(text, done) =>
        client.progress(text, done)

      case DebugEvent(text) =>
        client.debug(text)

      case TraceEvent(message, lines) =>
        client.trace(new ServerException(message, lines))

      case GeneratedEvent(source, module, name) =>
        client.generated(source, module, name)

      case DeletedEvent(module) =>
        client.deleted(module)

      case SourceProcessedEvent(source) =>
        client.processed(source)

      case CompilationEndEvent() =>
        client.compilationEnd()
    }
  }
}

class ServerException(message: String, lines: Array[String]) extends Exception {
  override def getMessage = message

  override def printStackTrace(s: PrintWriter) {
    lines.foreach(s.println)
  }

  override def printStackTrace(s: PrintStream) {
    lines.foreach(s.println)
  }
} 

//设置package包名称以及导入依赖的类
package java.lang

import java.io.{InputStream, PrintStream}
import java.util.Properties
import scala.scalanative.native._
import scala.scalanative.runtime.time

final class System private ()

object System {
  def arraycopy(src: Object,
                srcPos: scala.Int,
                dest: Object,
                destPos: scala.Int,
                length: scala.Int): Unit = {
    scalanative.runtime.Array.copy(src, srcPos, dest, destPos, length)
  }

  def exit(status: Int): Unit = {
    Runtime.getRuntime().exit(status)
  }

  def identityHashCode(x: Object): scala.Int =
    x.cast[Word].hashCode

  def getenv(name: String): String                      = ???
  def clearProperty(key: String): String                = ???
  def getProperties(): Properties                       = ???
  def getProperty(key: String): String                  = ???
  def getProperty(key: String, default: String): String = ???
  def setProperty(key: String, value: String): String   = ???

  def nanoTime(): CLong = time.scalanative_nano_time

  var in: InputStream  = _
  var out: PrintStream = new PrintStream(new CFileOutputStream(stdio.stdout))
  var err: PrintStream = new PrintStream(new CFileOutputStream(stdio.stderr))

  private class CFileOutputStream(stream: Ptr[stdio.FILE])
      extends java.io.OutputStream {
    private val buf = stdlib.malloc(1)
    def write(b: Int): Unit = {
      !buf = b.toUByte.toByte
      stdio.fwrite(buf, 1, 1, stream)
    }
  }
} 

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

import java.io.PrintStream

import org.mockito.Mockito._
import org.scalatest.{FreeSpec, Matchers}

class UrlPrinterTest extends FreeSpec with Matchers {
  "A UrlPrinter" - {
    val out = mock(classOf[PrintStream])
    val printer = new UrlPrinter(out)
    "should print" - {
      "the root" in {
        printer.printRoot("hello")

        verify(out).println("Visiting root: hello")
      }

      "the urls" in {
        val urls = List("/one", "/two")
        printer.printUrls(urls)

        verify(out).println("|_ /one")
        verify(out).println("|_ /two")
      }
    }
  }
} 

//设置package包名称以及导入依赖的类
package fr.cnrs.liris.accio.core.report

import java.io.{BufferedOutputStream, FileOutputStream, PrintStream}
import java.nio.file.Path

import fr.cnrs.liris.accio.core.thrift
import fr.cnrs.liris.util.io.FileUtils


  def write(reports: Seq[thrift.Report], path: Path): Unit = {
    val reportStats = new ReportStatistics(reports)
    FileUtils.safeDelete(path)
    val out = new PrintStream(new BufferedOutputStream(new FileOutputStream(path.toFile)))
    try {
      print(reportStats, out)
    } finally {
      out.close()
    }
  }
} 

//设置package包名称以及导入依赖的类
package fr.cnrs.liris.accio.core.report

import java.io.PrintStream

import fr.cnrs.liris.accio.lib.stats.{AggregatedStats, Distribution}
import fr.cnrs.liris.util.MathUtils.roundAt6


  private def printSummary(out: PrintStream, metric: String, stats: AggregatedStats) = {
    out.print(f"$metric%20s | ${stats.n}%10s")
    if (stats.n > 0) {
      out.print(f" | ${roundAt6(stats.min)}%10s")
      if (stats.n > 1) {
        out.print(f" | ${roundAt6(stats.max)}%10s | ${roundAt6(stats.avg)}%10s | ${roundAt6(stats.stddev)}%10s")
      }
    }
    out.println()
  }

  private def bold(str: String) = if (useAnsi) s"\033[1m$str\033[0m" else str
} 

//设置package包名称以及导入依赖的类
package org.kneelawk.simplecursemodpackdownloader.console

import java.io.Console
import java.io.PrintStream
import java.io.InputStream
import java.io.BufferedReader
import java.io.InputStreamReader

trait ConsoleInterface {
  def prompt(fmt: String, args: Object*): String

  def promptHiddenInput(fmt: String, args: Object*): String
}

class DefaultConsoleInterface(console: Console) extends ConsoleInterface {
  override def prompt(fmt: String, args: Object*) = console.readLine(fmt, args)

  override def promptHiddenInput(fmt: String, args: Object*) = new String(console.readPassword(fmt, args))
}

class EclipseConsoleInterface(out: PrintStream, in: InputStream) extends ConsoleInterface {
  val reader = new BufferedReader(new InputStreamReader(in))
  
  override def prompt(fmt: String, args: Object*) = {
    out.printf(fmt, args)
    reader.readLine()
  }

  override def promptHiddenInput(fmt: String, args: Object*) = {
    out.printf(fmt, args)
    reader.readLine()
  }
}

object ConsoleInterfaceFactory {
  def getConsoleInterface: ConsoleInterface = {
    val console = System.console()
    if (console != null) {
      return new DefaultConsoleInterface(console)
    } else if (System.in != null) {
      return new EclipseConsoleInterface(System.out, System.in)
    } else {
      return null
    }
  }
} 

//设置package包名称以及导入依赖的类
package org.vincibean.wikimedia.event.streams

import java.io.PrintStream
import java.net.ServerSocket

import akka.NotUsed
import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.client.RequestBuilding.Get
import akka.http.scaladsl.model.sse.ServerSentEvent
import akka.http.scaladsl.unmarshalling.Unmarshal
import akka.http.scaladsl.unmarshalling.sse.EventStreamUnmarshalling._
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.Source
import play.api.libs.json.{JsObject, Json}

object RecentChangesBackend {

  def main(args: Array[String]): Unit = {
    implicit val system = ActorSystem()
    implicit val mat = ActorMaterializer()
    import system.dispatcher

    val outStream = new PrintStream(
      new ServerSocket(8124).accept().getOutputStream)
    val printStreamFun = printStream(outStream) _

    Http()
      .singleRequest(
        Get("https://stream.wikimedia.org/v2/stream/recentchange"))
      .flatMap(httpResp =>
        Unmarshal(httpResp).to[Source[ServerSentEvent, NotUsed]])
      .map(_.map(event => stringToJson(event.data)))
      .foreach(_.runForeach(printStreamFun))
  }

  def stringToJson(message: String): JsObject = {
    val json = Json.parse(message)
    Json.obj(
      "user" -> json \ "user",
      "pageUrl" -> s"""${(json \ "server_url")
        .as[String]}/wiki/${(json \ "title")
        .as[String]
        .replaceAll(" ", "_")}""",
      "id" -> json \ "id",
      "timestamp" -> (json \ "timestamp").as[Long]
    )
  }

  def printStream(outStream: PrintStream)(json: JsObject): Unit = {
    outStream.println(json.toString)
    outStream.flush()
  }

} 

//设置package包名称以及导入依赖的类
package com.chrisomeara.pillar.core

import java.io.PrintStream
import java.util.Date

import com.datastax.driver.core.Session

class PrintStreamReporter(stream: PrintStream) extends Reporter {
  override def initializing(session: Session, keyspace: String, replicationOptions: ReplicationOptions) {
    stream.println(s"Initializing $keyspace")
  }

  override def migrating(session: Session, dateRestriction: Option[Date]) {
    stream.println(s"Migrating with date restriction $dateRestriction")
  }

  override def applying(migration: Migration) {
    stream.println(s"Applying ${migration.authoredAt.getTime}: ${migration.description}")
  }

  override def reversing(migration: Migration) {
    stream.println(s"Reversing ${migration.authoredAt.getTime}: ${migration.description}")
  }

  override def destroying(session: Session, keyspace: String) {
    stream.println(s"Destroying $keyspace")
  }
}