我正在嘗試從嵌套 JSON 中獲取資料，我只需要 JSON 中的幾個欄位，我為所需資料創建了案例類，我從谷歌找到的解決方案建議使用讀取函式，但我得到一個空物件我試過谷歌沒有成功，我錯過了什么？我的代碼
val rawDataFromFile = Source.fromFile(path).mkString
case class Data(listOfPersons: List[Person])
case class Person(bio: Bio, terms: List[Term])
case class Bio(birthday: String, gender: String)
case class Term(`type`: String, start: String, end: String)
read[Data](rawDataFromFile)
res >> Data(List())
和 JSON
[
{
"id": {
"not_intresting_field_1": "B000944",
"not_intresting_field_4": [
"H2OH13033",
"S6OH00163"
]
},
"name": {
"first": "first_name_1",
"last": "last_name_1"
},
"bio": {
"birthday": "1952-11-09",
"gender": "M"
},
"terms": [
{
"type": "rep",
"start": "1993-01-05",
"end": "1995-01-03"
},
{
"type": "rep",
"start": "1995-01-04",
"end": "1997-01-03"
}
]
},
{
"id": {
"not_intresting_field_1": "C000127",
"not_intresting_field_4": [
"S8WA00194",
"H2WA01054"
]
},
"name": {
"first": "first_name_1",
"last": "last_name_1"
},
"bio": {
"birthday": "1958-10-13",
"gender": "F"
},
"terms": [
{
"type": "rep",
"start": "1993-01-05",
"end": "1995-01-03"
},
{
"type": "sen",
"start": "2001-01-03",
"end": "2007-01-03"
}
]
}
]
uj5u.com熱心網友回復：
您的案例類與您的 json 結構不同。
在這里，您定義的Data型別將讀取 json，如下所示
{
"listOfPersons": [
{
"id": {
"not_intresting_field_1": "B000944",
"not_intresting_field_4": [
"H2OH13033",
"S6OH00163"
]
},
"name": {
"first": "first_name_1",
"last": "last_name_1"
},
"bio": {
"birthday": "1952-11-09",
"gender": "M"
},
... //your original json
}
]
}
嘗試這個
read[List[Person]](rawDataFromFile)
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