Scala DefaultFormats类代码示例

//设置package包名称以及导入依赖的类
package com.doanduyhai.rest

import com.doanduyhai.service.FibonacciService
import org.json4s.{DefaultFormats, Formats}
import org.scalatra.{InternalServerError, BadRequest, ScalatraServlet}
import org.scalatra.json.JacksonJsonSupport

class FibonacciREST extends ScalatraServlet with JacksonJsonSupport {

  protected implicit val jsonFormats: Formats = DefaultFormats

  before() {
    contentType = formats("json")
  }

  get("/:rank") {
    val rank = params("rank").toInt
    try {
      FibonacciService.computeFibonacci(rank)
    } catch {
      case ex: IllegalArgumentException => BadRequest(ex.getMessage)
      case throwable: Throwable => InternalServerError(throwable.getMessage)
    }
  }


  notFound {
    contentType = "text/html"
    serveStaticResource() getOrElse resourceNotFound()
  }
} 

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

import java.util.Properties
import org.apache.kafka.clients.producer.{KafkaProducer, ProducerRecord}
import org.json4s.{DefaultFormats, jackson}

class SimpleKafkaProducer(kafkaSocket: Socket, topic: String, brokers: Int = 1) {

  private val serializer = "org.apache.kafka.common.serialization.StringSerializer"

  private def configuration = {
    val props = new Properties()
    props.put("bootstrap.servers", kafkaSocket.toString())
    props.put("key.serializer", serializer)
    props.put("value.serializer", serializer)
    props
  }

  def send[T <: AnyRef](message: T) = {
    implicit val serialization = jackson.Serialization
    implicit val formats = DefaultFormats

    val producer = new KafkaProducer[String, String](configuration)
    val jsonMessage = serialization.write[T](message)
    val data = new ProducerRecord[String, String](topic, jsonMessage)

    producer.send(data)
    producer.close()
  }
} 

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

import javax.inject.Inject

import com.github.tototoshi.play2.json4s.native.Json4s
import models.{Item, ItemDetail}
import org.json4s.{DefaultFormats, Extraction}
import parsers.ItemParser
import play.api.mvc.{Action, Controller}
import requests.UploadZipItemForm
import scalikejdbc.DB

class ItemController @Inject()(json4s: Json4s) extends Controller {
  import json4s._
  import Responses._
  import models.PersistItem.getItemId
  implicit val formats = DefaultFormats

  def list() = Action {
    import models.Aliases.i
    val items = Item.findAll(i.name :: Nil)
    Ok(Extraction.decompose(items))
  }

  def show(itemId: Long) = Action {
    Item.findById(itemId).fold(notFound(s"itemId = ${itemId}")) { item =>
      Ok(Extraction.decompose(item))
    }
  }

  def upload() = Action(parse.multipartFormData){ implicit req =>
    UploadZipItemForm.fromReq(req).fold(BadRequest("Form error")){ form =>
      DB localTx { implicit session =>
        ZipUtil.inputStreams(form.file.ref.file).foreach{ is =>
          ItemParser.parse(is).foreach{ item =>
            val itemId = getItemId(item.name)
            ItemDetail.deleteById(itemId)
            ItemDetail.create(item.detail(itemId))
          }
        }
      }
      Redirect(routes.MyAssets.at("uploader.html"))
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.inspiringsolutions.tweet.services

import javax.inject.{Inject, Singleton}

import akka.actor.{ActorRef, ActorSystem}
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.Sink
import com.inspiringsolutions.tweet.actors.CompleteStream
import com.inspiringsolutions.tweet.models.{LimitNotice, Tweet}
import org.json4s.DefaultFormats
import org.json4s.native.JsonMethods._
import org.slf4j.LoggerFactory
import play.api.Play

import scala.concurrent.ExecutionContext.Implicits.global
import scala.util.{Failure, Success, Try}

@Singleton
class TwitterService @Inject() (twitterStreamService: TwitterStreamProducerService)  {

  private val log = LoggerFactory.getLogger(getClass)

  implicit lazy val actorSystem: ActorSystem = Play.unsafeApplication.injector.instanceOf[ActorSystem]
  implicit val materializer = ActorMaterializer()

  implicit val formats = DefaultFormats

  def processStreamToActorRef(streamConsumerRef: ActorRef, hashTag: String) {
    val streamFuture = twitterStreamService.produceStream(hashTag)

    streamFuture.onComplete {
      case Failure(ex) => log.error("Error while processing stream", ex)
      case Success(stream) =>
        stream.scan("")((acc, curr) => {
          if (acc.contains("\r\n"))
            curr.utf8String
          else
            acc + curr.utf8String
        })
        .filter(_.contains("\r\n")).filterNot(_.trim.isEmpty)
        .map { tryParse }
        .runWith(Sink.actorRef(streamConsumerRef, CompleteStream))
    }
  }

  private def tryParse(json: String) = {
    val parsed = parse(json)
    val tweetAttempt = Try(parsed.extract[Tweet])
    if (tweetAttempt.isSuccess) {
      tweetAttempt
    } else {
      Try(parsed.extract[LimitNotice])
    }
  }
} 

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

import akka.http.scaladsl.server.Directives._
import de.heikoseeberger.akkahttpjson4s.Json4sSupport
import org.json4s.jackson.Serialization.writePretty
import org.json4s.{DefaultFormats, jackson}

import scala.concurrent.Future

object DataConsumer extends Json4sSupport {

  implicit val serialization = jackson.Serialization // or native.Serialization
  implicit val formats = DefaultFormats

  val route =
    path("data") {
      post {
      entity(as[RootObject]) {
        data =>
          println(writePretty(data))
          complete(Future.successful(data.toString))
      }

      }
    }
} 

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

import org.json4s._
import org.json4s.native.JsonMethods._
import org.json4s.DefaultFormats

object TweetReader {

  implicit val format = new DefaultFormats {
  }

  def getTweets(json: String): List[Tweet] = parse(json).extract[List[Tweet]]

  def toTweetSet(l: List[Tweet]): TweetSet = l.foldLeft(new Empty: TweetSet)(_.incl(_))

  def unparseToData(tws: List[Tweet]): String = {
    val buf = new StringBuilder
    for (tw <- tws) {
      val json = "{ \"user\": \"" + tw.user + "\", \"text\": \"" +
        tw.text.replaceAll( """"""", "\\\\\\\"") + "\", \"retweets\": " +
        tw.retweets + ".0 }"
      buf.append(json + ",\n")
    }
    buf.toString()
  }

  val sites = List("gizmodo", "TechCrunch", "engadget", "amazondeals", "CNET", "gadgetlab", "mashable")

  private val gizmodoTweets = getTweets(TweetData.gizmodo)
  private val techCrunchTweets = getTweets(TweetData.TechCrunch)
  private val engadgetTweets = getTweets(TweetData.engadget)
  private val amazondealsTweets = getTweets(TweetData.amazondeals)
  private val cnetTweets = getTweets(TweetData.CNET)
  private val gadgetlabTweets = getTweets(TweetData.gadgetlab)
  private val mashableTweets = getTweets(TweetData.mashable)

  private val sources = List(gizmodoTweets, techCrunchTweets, engadgetTweets, amazondealsTweets, cnetTweets, gadgetlabTweets, mashableTweets)

  val tweetMap: Map[String, List[Tweet]] =
    Map() ++ Seq(sites(0) -> gizmodoTweets,
      sites(1) -> techCrunchTweets,
      sites(2) -> engadgetTweets,
      sites(3) -> amazondealsTweets,
      sites(4) -> cnetTweets,
      sites(5) -> gadgetlabTweets,
      sites(6) -> mashableTweets)

  val tweetSets: List[TweetSet] = sources.map(toTweetSet)

  private val siteTweetSetMap: Map[String, TweetSet] =
    Map() ++ (sites zip tweetSets)

  private def unionOfAllTweetSets(curSets: List[TweetSet], acc: TweetSet): TweetSet =
    if (curSets.isEmpty) acc
    else unionOfAllTweetSets(curSets.tail, acc.union(curSets.head))

  val allTweets: TweetSet = unionOfAllTweetSets(tweetSets, new Empty)
} 

//设置package包名称以及导入依赖的类
package uk.gov.hmrc.utils.json

import java.net.{URI, URL}

import org.json4s.JsonAST.JString
import org.json4s.jackson.JsonMethods.parse
import org.json4s.{CustomSerializer, DefaultFormats, Formats, JNull}

object JsonExtraction {

  val formats = DefaultFormats + json4sDateTimeSerializer + json4sLocalDateSerializer + UriSerializer + UrlSerializer + Json4sIntToBigDecimalSerializer

  def apply[A](body: String)(implicit m: Manifest[A], formats: Formats = formats): A = extractResponse[A](body)

  private def extractResponse[A](body: String)(implicit m: Manifest[A], format: Formats = formats): A = Option(body) match {
    case Some(b) if b.length > 0 =>
      try {
        parse(b, useBigDecimalForDouble = true).extract
      } catch {
        case t: Throwable =>
          throw t
      }
    case _ => throw new IllegalArgumentException("A string value is required for transformation")
  }

  case object UriSerializer extends CustomSerializer[URI](format => ( {
    case JString(uri) => URI.create(uri)
    case JNull => null
  }, {
    case uri: URI => JString(uri.toString)
  }
  ))

  case object UrlSerializer extends CustomSerializer[URL](format => ( {
    case JString(url) => new URL(url)
    case JNull => null
  }, {
    case url: URL => JString(url.toString)
  }
  ))

} 

//设置package包名称以及导入依赖的类
package org.dele.misc.scraping



import jdk.nashorn.internal.parser.JSONParser
import org.json4s.DefaultFormats
import org.jsoup._

import collection.JavaConverters._
import org.json4s.jackson.JsonMethods._
object JsoupTest extends App {

  val ua = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36"
  val searchTerm = "whitebacked planthopper"
  val searchUrl = "https://www.google.com/search?site=imghp&tbm=isch&source=hp&biw=1920&bih=955&q=" + searchTerm.replace(" ", "+") + "&gws_rd=cr";

  val doc = Jsoup.connect(searchUrl)
    .userAgent(ua)
    .referrer("https://www.google.com/").get()

  implicit val fmt = DefaultFormats
  doc.select("div.rg_meta").asScala.foreach{ elem =>
    val src = elem.text()
    val json = parse(src)
    val url = (json \ "ou")
    if (url != null) {
      val out = url.extract[String]
      println(out)
    }
  }

  println("end")
} 

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

import java.nio.charset.StandardCharsets
import java.util.Properties
import kafka.consumer.ConsumerConfig
import org.json4s.{DefaultFormats, jackson}
import scala.collection.immutable.HashMap

class SimpleKafkaConsumer(kafkaSocket: Socket, zooKeeperSocket: Socket, groupId: String, topic: String) {

  private def configuration = {
    val deserializer = "org.apache.kafka.common.serialization.StringDeserializer"
    val props = new Properties()
    props.put("bootstrap.servers", kafkaSocket.toString())
    props.put("key.deserializer", deserializer)
    props.put("value.deserializer", deserializer)
    props.put("group.id", groupId)
    props.put("consumer.id", "consumer0")
    props.put("consumer.timeout", "-1")
    props.put("auto.offset.reset", "smallest")
    props.put("zookeeper.sync.time.ms", "200")
    props.put("zookeeper.session.timeout.ms", "6000")
    props.put("zookeeper.connect", zooKeeperSocket.toString())
    props.put("num.consumer.fetchers", "2")
    props.put("rebalance.max.retries", "4")
    props.put("auto.commit.interval.ms", "1000")
    props
  }

  private val consumer = kafka.consumer.Consumer.create(new ConsumerConfig(configuration))

  def read[T <: AnyRef]()(implicit m: Manifest[T]): Iterable[T] = {
    implicit val serialization = jackson.Serialization
    implicit val formats = DefaultFormats

    val topicCountMap = HashMap(topic -> 1)
    val consumerMap = consumer.createMessageStreams(topicCountMap)
    val stream = consumerMap.get(topic).get(0)
    val iterator = stream.iterator()

    iterator.map(x => serialization.read[T](new String(x.message(), StandardCharsets.UTF_8))).toStream
  }

  def shutdown() = {
    consumer.shutdown()
  }
} 

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

import model.IDTrait
import com.sksamuel.elastic4s.ElasticDsl.index
import com.sksamuel.elastic4s.source.JsonDocumentSource
import org.json4s.jackson.Serialization._
import org.json4s.{DefaultFormats, Formats, FieldSerializer}
import com.sksamuel.elastic4s.{ElasticClient}
import com.sksamuel.elastic4s.ElasticDsl._
import org.json4s.FieldSerializer.renameTo
import org.elasticsearch.common.settings.ImmutableSettings


  def save[T <: IDTrait[E]: Manifest, E](record: T, indexName: String, indexType: String): Unit = {
    val rename = FieldSerializer[T](renameTo("_id", s"${indexType}_id"))
    implicit val format: Formats = DefaultFormats + rename ++ org.json4s.ext.JodaTimeSerializers.all

    val _id = record._id
    val jsonString = write(record)
    
    client.execute {
      index into indexName -> indexType doc JsonDocumentSource(jsonString) id _id
    }
  }

  def close = {
    client.close()
  }

} 

//设置package包名称以及导入依赖的类
package com.ntsdev.connect4.web


import com.ntsdev.connect4.game.Game
import com.ntsdev.connect4.model.{Cell, Board}
import com.ntsdev.connect4.wire.OptionCellSerializer
import org.json4s.{DefaultFormats, Formats}
import org.scalatra._
import org.scalatra.json._

import scala.concurrent.ExecutionContext


class Connect4API extends ScalatraServlet with JacksonJsonSupport with FutureSupport {
  protected implicit lazy val jsonFormats: Formats = DefaultFormats + new OptionCellSerializer

  override val executor: ExecutionContext = ExecutionContext.global

  get("/startGame"){
    val advanced = params("advanced")
    val useAdvancedPlayer = advanced eq "true"
    contentType = formats("json")
    val game = new Game(Board, advanced = useAdvancedPlayer)
    game.grid.board
  }

  post("/makeMove"){
    val grid = parsedBody.extract[List[Option[Cell]]]
    val game = new Game(new Board(grid))
    val column = params("column").toInt
    val newGame = game.makeMove(column)

    if(!"".equals(newGame.winningPlayer)){
      val winningPlayer = newGame.winningPlayer
      Ok(newGame.grid.board, Map("Winning-Player" -> winningPlayer))
    }
    else {
      Ok(newGame.grid.board)
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.ntsdev.connect4.wire

import com.ntsdev.connect4.model.{BlackCell, RedCell}
import org.json4s.{DefaultFormats, Formats}
import org.specs2.mutable.Specification

class OptionCellSerializerSpec extends Specification {

  private implicit lazy val jsonFormats: Formats = DefaultFormats + new OptionCellSerializer
  private val serialization = org.json4s.jackson.Serialization

  "the option cell serializer" should {
    "serialize an Option[Cell]" in {
      val redCell = RedCell
      val listOfOptionCell = List(Some(redCell))
      val redJson = serialization.write(listOfOptionCell)
      redJson shouldEqual "[{\"cell\":\"[R]\"}]"

      val blackCell = BlackCell
      val listOfBlackOptionCell = List(Some(blackCell))
      val blackJson = serialization.write(listOfBlackOptionCell)
      blackJson shouldEqual "[{\"cell\":\"[B]\"}]"

      val listOfBlankOptionCell = List(None)
      val blankJson = serialization.write(listOfBlankOptionCell)
      blankJson shouldEqual "[{\"cell\":\"[-]\"}]"

    }
  }
} 

//设置package包名称以及导入依赖的类
package com.ntsdev.connect4.web

import org.json4s.{DefaultFormats, Formats}
import org.scalatra.test.specs2.MutableScalatraSpec

class Connect4APISpec extends MutableScalatraSpec {

  protected implicit lazy val jsonFormats: Formats = DefaultFormats

  addServlet(classOf[Connect4API], "/*")

  "GET /startGame" should {
    "begin a game and return the board" in {
        get("/startGame?advanced=true") {
          status must_== 200
        }
    }

    "make a move" in {
      val postBody =
        """
          |[{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},
          |{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},
          |{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},
          |{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},
          |{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},
          |{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"},{"cell":"[-]"}]
        """.stripMargin

      post("/makeMove?column=0", postBody, Map("Content-Type" -> "application/json")){
        status must_== 200
      }
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.zhranklin.notice.script

import org.json4s.{DefaultFormats, ShortTypeHints, TypeHints}

trait MessageJsonFormats {
  implicit val format = new DefaultFormats {
    override val typeHintFieldName = "type"
    override val typeHints: TypeHints = ShortTypeHints(List(
      classOf[listsources],
      classOf[err],
      classOf[succ],
      classOf[getnews],
      classOf[fetch_test],
      classOf[getpictures],
      classOf[create_source],
      classOf[fetchnews]
    ))
  }
} 

//设置package包名称以及导入依赖的类
package com.sfxcode.nosql.mongo.model

import java.text.SimpleDateFormat
import java.util.Date

import org.json4s.DefaultFormats
import org.json4s.native.Serialization._
import org.mongodb.scala.bson.ObjectId

import scala.io.Source

case class Person(
  id: Long,
  guid: String,
  isActive: Boolean,
  balance: Double,
  picture: String,
  age: Int,
  name: String,
  gender: String,
  email: String,
  phone: String,
  address: String,
  about: String,
  registered: Date,
  tags: List[String],
  friends: List[Friend],
  greeting: String,
  favoriteFruit: String,
  _id: ObjectId = new ObjectId()
)

case class Friend(id: Long, name: String)

object Person {

  implicit val formats = new DefaultFormats {
    override def dateFormatter = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss")
  }

  val personList: List[Person] = read[List[Person]](fromJson("/test_data.json"))

  def fromJson(name: String): String = {
    val is = getClass.getResourceAsStream(name)
    Source.fromInputStream(is, "UTF-8").getLines().mkString
  }

}