scala 对象转Json和Json转对象的俩种方式

Dear 丶 2022-03-21 07:11 554阅读 0赞

直接进入正题

import play.api.libs.functional.syntax._
    import org.json4s.native.Serialization.read
    import play.api.libs.functional.syntax.unlift
    import play.api.libs.json.{JsPath, Json, Reads, Writes}
    
    /**
      * Created by zmm on 2019/1/31
      */
    
    case class FilterData(var id: Option[Int], publisherId: Int, subId: String, minPercentage: Byte, maxPercentage: Byte, var updateTime: Option[Int], status: Byte) {}
    
    object JsonUtil {
    
      implicit val filterDataReads: Reads[FilterData] = (
        (JsPath \ "id").readNullable[Int] and
          (JsPath \ "publisher_id").read[Int] and
          (JsPath \ "sub_id").read[String] and
          (JsPath \ "min_percentage").read[Byte] and
          (JsPath \ "max_percentage").read[Byte] and
          (JsPath \ "update_time").readNullable[Int] and
          (JsPath \ "status").read[Byte]
        ) (FilterData.apply _)
    
      implicit val filterDataWrites: Writes[FilterData] = (
        (JsPath \ "id").writeNullable[Int] and
          (JsPath \ "publisher_id").write[Int] and
          (JsPath \ "sub_id").write[String] and
          (JsPath \ "min_percentage").write[Byte] and
          (JsPath \ "max_percentage").write[Byte] and
          (JsPath \ "update_time").writeNullable[Int] and
          (JsPath \ "status").write[Byte]
        ) (unlift(FilterData.unapply))
    
    /**
    * 这种方法速度更快
    */
      def jsonToRead(): Unit = {
    
        val adResponse = FilterData(
          id = Some(1001),
          publisherId = 10001,
          subId = "213123123",
          minPercentage = 10.toByte,
          maxPercentage = 100.toByte,
          updateTime = Some(1213321),
          status = 0.toByte
        )
        var a = 0
        val stratTime = System.currentTimeMillis()
        while (a < 1) {
          val json = Json.toJson(adResponse)(filterDataWrites)
          json.validate[FilterData](filterDataReads)
          a += 1
        }
        println(System.currentTimeMillis() - stratTime + ": ms")
      }
    /**
    * 这种方法开发更方便一点
    */
      def jsonToRead11(): Unit = {
        val adResponse = FilterData(
          id = Some(1001),
          publisherId = 10001,
          subId = "213123123",
          minPercentage = 10.toByte,
          maxPercentage = 100.toByte,
          updateTime = Some(1213321),
          status = 0.toByte
        )
        var a = 0
        import org.json4s.native.Serialization.write
        implicit val formats = org.json4s.DefaultFormats
        val stratTime = System.currentTimeMillis()
        while (a < 1) {
          read[FilterData](write(adResponse))
          a += 1
        }
        println(System.currentTimeMillis() - stratTime + ": ms")
      }
    
      def main(args: Array[String]): Unit = {
        jsonToRead()
        jsonToRead11()
      }
    }

大家可以自己测试一下