如何拆分具有多個JSON資料字串的字串

我正在嘗試拆分檔案中具有兩個有效 JSON 字串的字串。我的資料看起來像這樣

{
    "abc": {
        "Version": "1.0",
        "Allocations": [
            {
                "xyz": "40014645",
                "efg": -5.0
            }
        ],
        "Date": "2022-10-11T07:29:00.000Z"
    },
    "tyu": 255,
    "pou": 2139,
}
{
    "abc": {
        "Version": "1.0",
        "Allocations": [
            {
                "xyz": "40014644",
                "efg": -3.0,
            }
        ],
        "Date": "2022-10-11T08:50:00.000Z"
    },
    "tyu": 255,
    "pou": 2139,
}

我的要求是將兩個 JSON 分開并在變數中獲取單獨的 JSON 字串，例如

{
    "abc": {
        "Version": "1.0",
        "Allocations": [
            {
                "xyz": "40014645",
                "efg": -5.0
            }
        ],
        "Date": "2022-10-11T07:29:00.000Z"
    },
    "tyu": 255,
    "pou": 2139,
}

和

{
    "abc": {
        "Version": "1.0",
        "Allocations": [
            {
                "xyz": "40014644",
                "efg": -3.0,
            }
        ],
        "Date": "2022-10-11T08:50:00.000Z"
    },
    "tyu": 255,
    "pou": 2139,
}

誰能幫我這個？架構本身沒有任何類。它只是一個帶有一些值的字串格式檔案。

uj5u.com熱心網友回復：

這可能有點古怪，但我將按原樣使用您的字串并假設您無法更改它。我將把它轉換成一個 json 陣列，為此我們需要用方括號括起來，但還要在每個外部大括號后添加逗號。這個代碼片段為我做了。

Stack<char> myStack = new Stack<char>();
string s = "";

//Find each outside curly brace and add a comma on the closing brace
foreach(char c in jsonString){
    if(c == '{'){
        myStack.Push(c);
    }
    if(c == '}'){
        myStack.Pop();
        if(myStack.Count == 0){
            //Closing curly, add a comma after
            s  = c; 
            s  = ',';
            continue;
        }
    }
    s  = c;
}

//Wrap in brackets to turn into array
s = s.Insert(0, "[");
s  = "]";

var options = new JsonSerializerOptions()
{
    AllowTrailingCommas = true
};

var obj = JsonSerializer.Deserialize<object[]>(s, options);
Console.WriteLine(obj[0].ToString());
Console.WriteLine(obj[1].ToString());

uj5u.com熱心網友回復：

如果一個檔案中只有 2 個 json，我會嘗試這樣的

    var i = 0;
    var countStart = false;
    for (i = 0; i < text.Length; i  )
    {
        if (text[i] == '}') countStart = true;
        else if (countStart)
        {
            if (text[i] == ',' || text[i] == ']') countStart = false;
            else if (text[i] == '{')  break; 
        }
    }

     var json1 = text.Substring(0, i - 1);
     var json2 = text.Substring(i);

或者最好將其轉換為 json 陣列

    text = "["   text.Substring(0, i - 1)   ",\n"   text.Substring(i)   "]";
    var jsonArray=JArray.Parse(text);
    string version1 = jsonArray[0]["abc"]["Version"].ToString(); // "1.0"

如果你有超過 2 個 json，這個演算法也可以很容易地調整。

    var countStart = false;
    var indexList = new List<int> { 0 };
    for (var i = 0; i < text.Length; i  )
    {
        if (text[i] == '}') countStart = true;
        else if (countStart)
        {
            if (text[i] == ',' || text[i] == ']') countStart = false;
            else if (text[i] == '{') { indexList.Add(i); countStart = false; }
        }
    }

    var json = "[";
    for (var i = 0; i < indexList.Count; i  )
    {
        if (i == indexList.Count - 1)
            json  = text.Substring(indexList[i]);
        else
            json  = text.Substring(indexList[i], indexList[i   1] - indexList[i])   ",";
    }

    json  = "]";
    var jsonArray = JArray.Parse(json);

uj5u.com熱心網友回復：

string.Replace您可以同時使用和來實作您的目標string.Split。我復制了您在問題中發布的 json，并粘貼到名為json.txt

internal class Program
{
    private static void Main(string[] args)
    {
        string text = File.ReadAllText("json.txt");

        // inject curly brackets so that we can split without loosing
        // one on each side
        text = text.Replace("}\r\n{", "}}\r\n{{");

        var jsonArr = text.Split("}\r\n{");

        // print 1st json
        Console.WriteLine("This the 1st json");
        Console.WriteLine(jsonArr[0]);

        // print 2nd json
        Console.WriteLine("This the 2nd json");
        Console.WriteLine(jsonArr[1]);
    }
}

輸出：

This the 1st json
{
    "abc": {
        "Version": "1.0",
        "Allocations": [
            {
                "xyz": "40014645",        
                "efg": -5.0
            }
        ],
        "Date": "2022-10-11T07:29:00.000Z"
    },
    "tyu": 255,
    "pou": 2139,
}
This the 2nd json
{
    "abc": {
        "Version": "1.0",
        "Allocations": [
            {
                "xyz": "40014644",
                "efg": -3.0,
            }
        ],
        "Date": "2022-10-11T08:50:00.000Z"
    },
    "tyu": 255,
    "pou": 2139,
}

標籤：C＃json。网

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