將JSON解析為對象數組

Question

我創建了一個包含對象的數組，其中一些屬性也是對象。 我已經成功將其轉換為JSON，並且需要將其轉換回對象數組，或者以某種方式從JSON對象的正確索引中提取正確的數據。

更新

這是我通過JSON.parse運行它時得到的示例：

[{"Result":"Fail","Method":"T97E-v1","Beam1":{"BeamAge":"1","WidthUpper":1,"WidthCenter":1,"WidthLower":1,"WidthAverage":1,"DepthRight":1,"DepthCenter":1,"DepthLeft":1,"DepthAverage":1,"MaxLoad":1,"FS":18,"PSI":"18.00000","BreakOutside":"No"},"Beam2":{"BeamAge":"","WidthUpper":null,"WidthCenter":null,"WidthLower":null,"WidthAverage":null,"DepthRight":null,"DepthCenter":null,"DepthLeft":null,"DepthAverage":null,"MaxLoad":null,"FS":null,"PSI":"NaN"},"WaitForCuring":"No","AverageOfBeams":"NaN"}]

更新2

這是關於我在做什么的代碼：

try {
    localStorage["flexuralStrengthSamples"] = JSON.stringify(JSON.stringify(t97Samples));
    var parsedObject = JSON.parse(localStorage["flexuralStrengthSamples"]);

    console.log(parsedObject);                    
    console.log(parsedObject[0].Beam1.MaxLoad);            
} catch (err) {
    alert(err.message);
}

Answer 1

您可以使用JSON.parse()解析JSON。

更新
這是JSON.parse()中的數據樣本。

[{"Result":"Fail","Method":"T97E-v1","Beam1":{"BeamAge":"1","WidthUpper":1,"WidthCenter":1,"WidthLower":1,"WidthAverage":1,"DepthRight":1,"DepthCenter":1,"DepthLeft":1,"DepthAverage":1,"MaxLoad":1,"FS":18,"PSI":"18.00000","BreakOutside":"No"}}]

為了獲取數據，您需要對數組使用括號符號，對對象使用點符號。 因此，讓data等於該JSON數組，則可以執行data[0].Result （即"Fail" ）或data[0].Beam1.MaxLoad （即1 。

Answer 2

我知道原因：在將其存儲在本地存儲中之前，您要進行兩次穿線

try {
     localStorage["flexuralStrengthSamples"] = (JSON.stringify(t97Samples)); //Stringify only once, since localstorage values needs to be string
     var parsedObject = JSON.parse(localStorage["flexuralStrengthSamples"]); // should give the original object.


   console.log(parsedObject[0].Beam1.MaxLoad); // Since parsedObject is still string, this was failing. Now should work fine           
} catch (err) {
   alert(err.message);
}

在這里查看工作的小提琴： http : //jsfiddle.net/sandenay/pnb88p4s/