傑克遜解析json嵌套對象是一個JSON Stringify字符串

Question

我有這樣的json數據。我想解析bidRequestString，bidResponseCreative，bidResponseData的嵌套對象。

這是json。

{ 
    "auctionId": "6c676664666b6621dr46c6b6c6c6a68", 
    "bidRequestString": "{\"id\":\"6c676664666b6621dr46c6b6c6c6a68\",\"timestamp\":\"2015-09-04T04:44:24.381Z\",\"isTest\":false,\"url\":\"http://www.bsd.vvv.com/\",\"userAgent\":\"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070118 Firefox/2.0.0.2pre\",\"protocolVersion\":\"Google Protocol Buffer\",\"exchange\":\"adx\",\"provider\":\"Google\",\"location\":{\"dma\":-1,\"metro\":-1,\"timezoneOffsetMinutes\":-1},\"segments\":{\"AdxDetectedVerticals\":[\"24:0.618452\",\"355:0.733486\",\"380:0.258120\",\"433:0.897398\",\"474:0.426707\"]},\"userIds\":{\"prov\":\"aGtqaq2ikdta21kZ2ZpbGZu70mo\",\"xchg\":\"aGtqaq2ikdta21kZ2ZpbGZu70mo\"},\"imp\":[{\"id\":\"66\",\"banner\":{\"w\":[220,300],\"h\":[600,450],\"id\":\"66\",\"pos\":0,\"topframe\":0},\"pmp\":{\"ext\":{\"adgroup_id\":\"17490739393\"}},\"formats\":[\"220x600\",\"300x450\"],\"position\":0},{\"id\":\"165\",\"banner\":{\"w\":120,\"h\":600,\"id\":\"165\",\"pos\":0,\"topframe\":0},\"pmp\":{\"ext\":{\"adgroup_id\":\"17490739393\"}},\"formats\":[\"120x600\"],\"position\":0}],\"spots\":[{\"id\":\"66\",\"banner\":{\"w\":[220,300],\"h\":[600,450],\"id\":\"66\",\"pos\":0,\"topframe\":0},\"pmp\":{\"ext\":{\"adgroup_id\":\"17490739393\"}},\"formats\":[\"220x600\",\"300x450\"],\"position\":0},{\"id\":\"165\",\"banner\":{\"w\":120,\"h\":600,\"id\":\"165\",\"pos\":0,\"topframe\":0},\"pmp\":{\"ext\":{\"adgroup_id\":\"17490739393\"}},\"formats\":[\"120x600\"],\"position\":0}],\"site\":{\"page\":\"http://www.bsd.vvv.com/\"},\"device\":{\"ua\":\"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070118 Firefox/2.0.0.2pre\",\"ip\":\"106.100.108.0\",\"geo\":{\"zip\":\" 3000\"},\"language\":\"en\",\"ext\":{\"geo_criteria_id\":1000567}},\"user\":{\"id\":\"aGtqaq2ikdta21kZ2ZpbGZu70mo\",\"ext\":{\"cookie_age_seconds\":1595306}}}", 
    "bidResponseCreative": "{\"itemId\":\"vkixi_cds0803_2015073133198\",\"campaignId\":\"859834ead1264843434cf6627ds43294d1\",\"htmlSnippet\":\"\\u003ciframe frameborder=0 scrolling=no width=\\\"300\\\" height=\\\"250\\\" src=\\\"//sv.xxx.com/adedge/api/bd/serving/simple/frame?aukey=1976ae04bc8eddsddsds34b02ae545333c\\u0026_=%%CACHEBUSTER%%\\u0026winning_price=%%WINNING_PRICE%%\\u0026google_click_url=%%CLICK_URL_ESC%%\\u0026encrypt_value=%%ENCRYPT_VALUE%%\\\"\\u003e\\u003c/iframe\\u003e\",\"name\":\"Expandable Web\",\"formatCode\":\"billboard\",\"bd\":\"\",\"status\":1,\"deleted\":false,\"landingPage\":\"https://zadds.sg\",\"tagging\":[1,2,3],\"expandingDirection\":14,\"bdUrl\":\"\",\"format\":{\"code\":\"billboard\",\"name\":\"Billboard\",\"publisher\":\"default\",\"type\":\"standard\",\"width\":120,\"height\":600,\"expanded_width\":0,\"expanded_height\":0,\"collapsed_width\":0,\"collapsed_height\":0,\"aspratio\":3.76,\"expandable\":true,\"expand_first\":true}}", 
    "bidResponseData": "{\"bids\":[{\"creative\":3,\"ext\":null,\"price\":\"72USD/1M\",\"priority\":1.0,\"spotIndex\":0},{\"creative\":2,\"ext\":null,\"price\":\"60USD/1M\",\"priority\":1.0,\"spotIndex\":1}]}", 
    "biddingMainAccount": "859834ead1264843434cf6627ds43294d1", 
    "impIndex": "1", 
    "impressionId": "165", 
    "rawWinPrice": "100USD/1M", 
    "timestamp": "2015-Sep-04 04:44:24.49340", 
    "userIds": "{\"prov\":\"aGtqaq2ikdta21kZ2ZpbGZu70mo\"}", 
} 

我做這樣的事情

case class Bids(creative: Int, price: String, spotIndex: Int) 

    case class BidResponseData(bids: Array[Bids]) 

     // 
    case class UserId(prov: String, xchg: String) 

    case class BidRequestString(id: String, isTest: Option[Boolean], 
            url: String, userAgent: Option[String], 
            exchange: Option[String], provider: Option[String], 
            userIds: Option[UserId]) 

     // 
    case class Format(width: Int, height: Int) 

    case class BidResponseCreative(format: Format) 

     // 
    case class WinMessage(auctionId: String, bidRequestString: BidRequestString, 
           bidResponseCreative: BidResponseCreative, bidResponseData: BidResponseData, 
           biddingMainAccount: String, impIndex: String, 
           rawWinPrice: String, timestamp: String) 
    val jsonSerializer = { 
     val m = new ObjectMapper() with ScalaObjectMapper 
     m.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false) 
     m.registerModule(DefaultScalaModule) 
     m 
     } 
    var message = jsonSerializer.readValue[WinMessage](eventMessage) 

但我得到的錯誤：

ERROR Executor: Exception in task 0.0 in stage 2.0 (TID 2) 
com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class com.knx.adx.storage.processor.BidRequestString] 

所以我做這樣的事情每個元素，並將其解析成JSON對象。

var message = jsonSerializer.readValue[Map[Any, Any]](eventMessage) 
    message.foreach { 
       case (k, v) => { 
       if (k == "bidRequestString") { 
        val tempObj = jsonSerializer.readValue[BidRequestString](v.toString) 
    } 
    } 
} 

我想問的是，正確的方法來做到這一點？我能做些什麼來使其更好或更快解析？現在它只能解析大約2k-3k個記錄/秒。

Answer 1

這不是一個有效的Json，你的嵌套對象不是嵌套對象，它們僅僅是包含Json的字符串。他們不會被解析爲Json，並且會保持字符串。