使用來自JSON對象的值提取對象（數據）

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請分享從JSON對象中使用值提取對象的所有可能方式。考慮以下JSON例如：使用來自JSON對象的值提取對象（數據）

{ 
"ProductCollection": [ 
    { 
     "ProductId": "1239102", 
     "Name": "Power Projector 4713", 
     "Category": "Projector", 
     "SupplierName": "Titanium", 
     "Description": "A very powerful projector with special features for Internet usability, USB", 
     "WeightMeasure": 1467, 
     "WeightUnit": "g", 
     "Price": 856.49, 
     "CurrencyCode": "EUR", 
     "Status": "Available", 
     "Quantity": 3, 
     "UoM": "PC", 
     "Width": 51, 
     "Depth": 42, 
     "Height": 18, 
     "DimUnit": "cm" 
    }, 
    { 
     "ProductId": "2212-121-828", 
     "Name": "Gladiator MX", 
     "Category": "Graphics Card", 
     "SupplierName": "Technocom", 
     "Description": "Gladiator MX: DDR2 RoHS 128MB Supporting 512MB Clock rate: 350 MHz Memory Clock: 533 MHz, Bus Type: PCI-Express, Memory Type: DDR2 Memory Bus: 32-bit Highlighted Features: DVI Out, TV Out , HDTV", 
     "WeightMeasure": 321, 
     "WeightUnit": "g", 
     "Price": 81.7, 
     "CurrencyCode": "EUR", 
     "Status": "Discontinued", 
     "Quantity": 10, 
     "UoM": "PC", 
     "Width": 34, 
     "Depth": 14, 
     "Height": 2, 
     "DimUnit": "cm" 
    } 
] 
}

如果我輸入「角鬥士MX」，我想整個對象如下：

{ 
     "ProductId": "2212-121-828", 
     "Name": "Gladiator MX", 
     "Category": "Graphics Card", 
     "SupplierName": "Technocom", 
     "Description": "Gladiator MX: DDR2 RoHS 128MB Supporting 512MB Clock rate: 350 MHz Memory Clock: 533 MHz, Bus Type: PCI-Express, Memory Type: DDR2 Memory Bus: 32-bit Highlighted Features: DVI Out, TV Out , HDTV", 
     "WeightMeasure": 321, 
     "WeightUnit": "g", 
     "Price": 81.7, 
     "CurrencyCode": "EUR", 
     "Status": "Discontinued", 
     "Quantity": 10, 
     "UoM": "PC", 
     "Width": 34, 
     "Depth": 14, 
     "Height": 2, 
     "DimUnit": "cm" 
    }

希望這個問題是清楚的。 TIA。

來源

2015-12-21 Venkat

您使用哪種語言？ Java的？ – BenC

不..我想用Javascript。 – Venkat

JSONArray對象有一個函數getJSONObject（int index），你可以通過編寫一個簡單的for循環遍歷所有的JSONObjects。我假定你有JSON數組名productCollection如果不創建一個JSON數組，並做如下

for(int i = 0; productCollection.length(); i++){ 

      JSONObject myObj = productCollection.getJSONObject(i); 
    if(myObj .has("Gladiator MX")) { 
    //return your jsonobject else do something 
    } 
}

來源

2015-12-21 09:30:33 Zia

我會試試這個。但是，我使用了「$ .each（）」。 – Venkat

首先你會分析你的JSON字符串轉換成Javascript對象使用JSON.parse。

現在你的問題是在一個對象數組中找到一個特定的對象。您可以使用filter或手冊for循環：

var data = JSON.parse(jsonstring); 
var products = data["ProductCollection"]; 
var gladiatorMX; 

for (var i = 0; i < products.length; i++) { 
    var product = products[i]; 
    if (product["Name"] == "Gladiator MX") { 
     gladiatorMX = product; 
     break; 
    } 
}

來源

2015-12-23 00:18:52 BenC

使用來自JSON對象的值提取對象（數據）

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