JSON中的“\”是什么？

Question

我正在练习JSON解析，遇到这种JSON

{
"data": {
  "Location": "[{\"id\":\"asdiqwe321\",\"name\":\"Manila\",\"lat\":25.42952,\"long\":-96.7960712,\"rating\":3,\"address\":\"Manila Ph\"},{\"place_id\":\"zzxdasdqwe1235as\",\"name\":\"Quezon City Ph.\",\"lat\":12.523562,\"long\":24.663415,\"rating\":1,\"address\":\"Quezon City Ph\"},{\"place_id\":\"rtiDFSDQ1321\",\"name\":\"Makati\",\"lat\":32.151236,\"long\":21.24124561,\"rating\":3.5,\"address\":\"Makati PH\"}]"
}
}

我有一个模型，想把它放在那里：

export interface Location{    
 place_id: string,
 name: string,
 lat: number,
 long: number,
 rating: number,
 address: number
}

我第一次遇到这种JSON。我希望有人能帮助我并了解它是什么。

Answer 1

它是序列化形式的 Location 类型对象数组。

var response = {
  "data": {
    "Location": "[{\"id\":\"asdiqwe321\",\"name\":\"Manila\",\"lat\":25.42952,\"long\":-96.7960712,\"rating\":3,\"address\":\"Manila Ph\"},{\"place_id\":\"zzxdasdqwe1235as\",\"name\":\"Quezon City Ph.\",\"lat\":12.523562,\"long\":24.663415,\"rating\":1,\"address\":\"Quezon City Ph\"},{\"place_id\":\"rtiDFSDQ1321\",\"name\":\"Makati\",\"lat\":32.151236,\"long\":21.24124561,\"rating\":3.5,\"address\":\"Makati PH\"}]"
  }
}

你必须解析它。

var locationData : Array<Location> = JSON.Parse(response.data.Location);

Answer 2

那不是 JSON 对象，那是一个字符串。 \ 字符用于转义双引号 "，否则 JavaScript 会将双引号解释为字符串的结尾并抛出解析错误。

如果要将字符串作为对象访问，需要使用JSON.parse:

进行解析

const obj = {
"data": {
  "Location": "[{\"id\":\"asdiqwe321\",\"name\":\"Manila\",\"lat\":25.42952,\"long\":-96.7960712,\"rating\":3,\"address\":\"Manila Ph\"},{\"place_id\":\"zzxdasdqwe1235as\",\"name\":\"Quezon City Ph.\",\"lat\":12.523562,\"long\":24.663415,\"rating\":1,\"address\":\"Quezon City Ph\"},{\"place_id\":\"rtiDFSDQ1321\",\"name\":\"Makati\",\"lat\":32.151236,\"long\":21.24124561,\"rating\":3.5,\"address\":\"Makati PH\"}]"
}
};


const locationString = obj.data.Location;
const locationObject = JSON.parse(locationString);
console.log(locationObject[0].id);

如果你不解析它，相反，obj.data.Location只是一个字符串：

const obj = {
"data": {
  "Location": "[{\"id\":\"asdiqwe321\",\"name\":\"Manila\",\"lat\":25.42952,\"long\":-96.7960712,\"rating\":3,\"address\":\"Manila Ph\"},{\"place_id\":\"zzxdasdqwe1235as\",\"name\":\"Quezon City Ph.\",\"lat\":12.523562,\"long\":24.663415,\"rating\":1,\"address\":\"Quezon City Ph\"},{\"place_id\":\"rtiDFSDQ1321\",\"name\":\"Makati\",\"lat\":32.151236,\"long\":21.24124561,\"rating\":3.5,\"address\":\"Makati PH\"}]"
}
};


console.log(typeof obj.data.Location);

您通常需要为序列化目的对对象进行字符串化或解析。

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