html - 加特林机 : get the first element of the first object in a JSON Array

Question

我有这个 JSON 对象:

{"isCompany":false,"accommodations":[{"id":"00000000031000000067","isChecked":false,"name":"5 JULI 2017","addressLine1":"STRAAT 10 ","addressLine2":"1000 New York","nightsDeclared":0,"schoolNightsDeclared":0,"schoolNightsAttached":0,"taxableNights":0.0,"totalPayment":0.0,"isInProgress":false,"isLate":false,"isPayed":"false","deadline":"2021-12-31","initialAmount":0.0,"remainingAmount":0.0},{"id":"00000000031000006362","isChecked":false,"name":"BELLEVIE","addressLine1":"STRAAT 10 ","addressLine2":"1000 New York","nightsDeclared":0,"schoolNightsDeclared":0,"schoolNightsAttached":0,"taxableNights":0.0,"totalPayment":0.0,"isInProgress":false,"isLate":false,"isPayed":"false","deadline":"2021-12-31","initialAmount":0.0,"remainingAmount":0.0}]}

如果美化，渲染这个:

{
  "isCompany": false,
  "accommodations": [
    {
      "id": "00000000031000000067",
      "isChecked": false,
      "name": "5 JULI 2017",
      "addressLine1": "STRAAT 10 ",
      "addressLine2": "1000 New York",
      "nightsDeclared": 0,
      "schoolNightsDeclared": 0,
      "schoolNightsAttached": 0,
      "taxableNights": 0.0,
      "totalPayment": 0.0,
      "isInProgress": false,
      "isLate": false,
      "isPayed": "false",
      "deadline": "2021-12-31",
      "initialAmount": 0.0,
      "remainingAmount": 0.0
    },
    {
      "id": "00000000031000006362",
      "isChecked": false,
      "name": "BELLEVIE",
      "addressLine1": "STRAAT 10 ",
      "addressLine2": "1000 New York",
      "nightsDeclared": 0,
      "schoolNightsDeclared": 0,
      "schoolNightsAttached": 0,
      "taxableNights": 0.0,
      "totalPayment": 0.0,
      "isInProgress": false,
      "isLate": false,
      "isPayed": "false",
      "deadline": "2021-12-31",
      "initialAmount": 0.0,
      "remainingAmount": 0.0
    }
  ]
}

我通过编写以下代码从 HTML 中的 div 获得了这个完整的 JSON 数组:

.check(css("section.ht-declarations-tab-content-container>div#DATA--DECL-DATA").saveAs("jsonObj"))

然后为了渲染结果我写了这个:

.exec { session => println("json = " + session("jsonObj").as[String]); session }.exitHereIfFailed

但是正如所解释的，我得到了完整的 JSON 数组。

如何只获取第一个对象的第一个 ID 元素？所以基本上:00000000031000000067

Answer 1

如果您的 JSON 嵌入在 HTML 中，您有 2 种可能性:

1. 使用 css 检查，就像您目前所做的那样，从 HTML 中提取 JSON，然后使用 transform解析 JSON 并提取所需的值，例如使用其他答案中建议的 Jackson
2. 使用 regex 一次性提取所需的值，例如 check(regex(""""accommodations":\[\{"id":"(.*?) """"))