【发布时间】：2019-10-06 03:15:12
【问题描述】：
我正在尝试解析从 HTTP 请求返回的 JSON 数据，如下所示。 导入 scalaj.http.{Http, HttpResponse}
import scala.util.parsing.json.JSON
import scalaj.http.{Http, HttpResponse}
object ScalaHttp {
def main(args: Array[String]): Unit = {
def get(url: String,i: Int) = Http(url).param("page",i.toString)
for(i <- 1 to 15 by 1) {
var jsonFile = get("url",i).asString
println(jsonFile)
}
}
}
数据以页面形式出现，因此我手动从 1 到 15 遍历所有页面，每个页面返回一个元素，如下所示。
当我打印字符串：L jsonFile 时，我看到以下格式的字符串：
HttpResponse({"run_sessions":[{"id":9003843,"start_time":"2012-02-22T10:59:06.000Z","end_time":"2012-02-22T11:52:43.000Z","duration":3217769,"distance":13644,"encoded_trace":null,"sport_type_id":3},{"id":9000024,"start_time":"2012-02-22T09:12:51.000Z","end_time":"2012-02-22T18:49:26.000Z","duration":7009,"distance":0,"encoded_trace":null,"sport_type_id":7},{"id":9003605,"start_time":"2012-02-21T12:21:00.000Z","end_time":"2012-02-21T12:43:47.000Z","duration":1367000,"distance":2600,"encoded_trace":"kd}wHuo~n@?fDlCbG?vE{@|GfB|FmAjHzCtIzBmEhAgGcE}DuDyEuE}DaCeEAsHjDSrBnDlBaA_EuGf@aEGjD","sport_type_id":1},{"id":9003604,"start_time":"2012-02-21T12:21:00.000Z","end_time":"2012-02-21T12:44:02.000Z","duration":1382000,"distance":2600,"encoded_trace":"gd}wHiq~n@_@hDvDpGe@nEi@tG~C|FgDtFxCjKvCaB`CqFsEuEgDcFkEsCaCyH{@}D|CmBrBhCxCp@oE}Hb@wEDn@","sport_type_id":1},{"id":9003952,"start_time":"2012-02-21T12:15:00.000Z","end_time":"2012-02-21T12:59:59.000Z","duration":2699120,"distance":6990,"encoded_trace":"ktcsGi~x]{@]rD~@{Jt@k@jI{BfJqJ{a@f@xa@}CmGsHa\\\\KhJsD}CaA}MrO{`@cCrL|Iub@hCsJvAyClB}DxAqD`EtA}End@rCtFdKiQbCdAbDaH~B}FjAlDbGlCvMmCyLf\\\\?nEnAhL{B|H}@hEvWiPqBbEan@|\\\\h@oDqBrCuDgILaHhBeFzGgFxE|@pB|BdBnCl@rC{Bt@qB~BJnG}@tA","sport_type_id":1},{"id":9004251,"start_time":"2012-02-21T12:07:13.000Z","end_time":"2012-02-21T14:38:45.000Z","duration":7820873,"distance":54670,"encoded_trace":"ybtzHqgx_@ifAp}Bw^n}B{Dl{DhBlqDqzCvi@aWdaDtf@~tCru@x~CdL~mExYjuEhoBqNvlC{gAbtA`mAxByyCx@{eFm`@wuF_j@elGiMqeG_k@a{E_y@w`D","sport_type_id":4},{"id":9004249,"start_time":"2012-02-21T12:07:04.000Z","end_time":"2012-02-21T13:41:35.000Z","duration":5676621,"distance":8909,"encoded_trace":"irveHulcvAMP{CzWiGvEyEtCs@uHiDzIqBfH{ErH{ExD{HuBgFvA{Dr@o@jH}D`GqFpE}GeBvAmExBqFjOcBRzDkEvFeH`GgGy@n@iIdEmHtO`@uGxLcL|EaC_GjDkFxMaF`DxDiErGkGhFsFVk@qHxCqF`QaGnHgCfEjAdGB|FoDlDgFbCgIpBcGrBJrArFxAkIhGuCzDa@?yU","sport_type_id":2},{"id":9004252,"start_time":"2012-02-21T12:07:00.000Z","end_time":null,"duration":0,"distance":0,"encoded_trace":null,"sport_type_id":1},{"id":9004245,"start_time":"2012-02-21T12:06:51.000Z","end_time":"2012-02-21T12:39:51.000Z","duration":1760262,"distance":4579,"encoded_trace":"axfvBrsr|Q?GTeCp@_EdBkD|@uD\\\\sDVuA}@`DWpDs@nDiAzCaAvDIn@r@oDhAmDdAsDd@cDb@}CJ_Aq@~Da@`Di@lDyArCq@dDSlBj@iDr@{CzA_Et@cEDaC`AqCeAxC?zBu@pCq@rCsAxCk@rCOfAl@aDbAwDrA_Dp@iDV}CRiAq@|De@rDk@zCkAnC_AhDSdC","sport_type_id":1},{"id":9004243,"start_time":"2012-02-21T12:06:48.000Z","end_time":"2012-02-21T13:05:57.000Z","duration":3547966,"distance":8096,"encoded_trace":"ckrtGs_ew@cZ_R_]gXg\\\\hAaJu@iBwJ_N{OuHuGiE{XKgNlCcLkAhLNbN`Kt_@dQxSnFnMzL}UfOxL`f@da@|VdV??","sport_type_id":1},{"id":9004239,"start_time":"2012-02-21T12:06:48.000Z","end_time":"2012-02-21T14:53:22.000Z","duration":9985106,"distance":13048,"encoded_trace":null,"sport_type_id":2},{"id":9004238,"start_time":"2012-02-21T12:06:47.000Z","end_time":"2012-02-21T12:21:38.000Z","duration":891191,"distance":2721,"encoded_trace":"u{ckGiy`LBHPjBHrBpAxAPnBIdC]xCU`CVpBF~BLnBpArA|ApAjAj@lAn@hBj@~A_@lBKbAmBb@eB?aCEgA}Aw@w@NiA]iAOuAF{Bp@kA`BX|B^~BxAvAxAp@jBi@`@iDb@wCmAs@}AYQaAL{Bd@uBVyCL{CY}AyAAuAKiBs@}AgA}@uAoAcB]g@","sport_type_id":1},{"id":9004232,"start_time":"2012-02-21T12:06:34.000Z","end_time":"2012-02-21T12:08:16.000Z","duration":101937,"distance":845,"encoded_trace":null,"sport_type_id":9},{"id":9004230,"start_time":"2012-02-21T12:06:30.000Z","end_time":null,"duration":0,"distance":0,"encoded_trace":null,"sport_type_id":1},{"id":9004226,"start_time":"2012-02-21T12:06:18.000Z","end_time":null,"duration":0,"distance":0,"encoded_trace":null,"sport_type_id":5}],"meta":{"pagination":{"per_page":15,"available_pages":71,"total":1059,"page":"1","sort_by":"start_time","order":"desc"}}},200,Map(Cache-Control -> Vector(max-age=0, private, must-revalidate), Connection -> Vector(keep-alive), Content-Length -> Vector(3727), Content-Type -> Vector(application/json; charset=utf-8), Date -> Vector(Tue, 01 Oct 2019 11:44:24 GMT), Etag -> Vector("2269df166d2348a8adc43b8170651bc8"), Server -> Vector(WEBrick/1.3.1 (Ruby/1.9.3/2014-05-14)), Set-Cookie -> Vector(request_method=GET; path=/), Status -> Vector(HTTP/1.1 200 OK), Via -> Vector(1.1 vegur), X-Content-Type-Options -> Vector(nosniff), X-Frame-Options -> Vector(SAMEORIGIN), X-Request-Id -> Vector(321da733-1172-4547-90a2-42d5d3b027fa), X-Runtime -> Vector(0.068370), X-Ua-Compatible -> Vector(chrome=1), X-Xss-Protection -> Vector(1; mode=block)))
使用的库：
name := "ScalaRest"
version := "0.1"
scalaVersion := "2.11.8"
libraryDependencies += "org.scalaj" %% "scalaj-http" % "2.3.0"
它在我不明白如何解析的字符串中有 Maps, Sets。 从上面的 JSON 格式的字符串中，我如何解析数据并提取元素的数据：id、starttime、endtime、duration
【问题讨论】：
-
你尝试过什么/编码？你使用哪个库？
-
使用 scalaJ 库。我已经用 build.sbt 文件的内容更新了问题
-
scala.util.parsing.json已被弃用超过 3 年（出于很好的理由）。我建议您使用合适的库，例如 Circe、json4s、play-json、uJson 等。