Question

我可以从json中获取另一个对象的key值吗？我该怎么做？使用数组过滤器还是for循环？

我尝试使用数组过滤器，但它只返回整个json对象

这是我的示例JSON：

[
  {
    "type":1,
    "key": "123abc",
    "data": {
        "access": "123456"
        "data": {
          "dataValue": [
            {
              "@attr": {
                 "@key": "Fire"
              },
              "@value": "Flame"
            },
            {
              "@attr": {
                 "@key": "Water"
              },
              "@value": "Liquid"
            },
            {
              "@attr": {
                 "@key": "Earth"
              },
              "@value": "Stone"
            }
          ]
        }
     }
  }
]

我想要的是通过从“ @key”中搜索“水”来从@value中获取“液体”值

输出：液体

感谢您的帮助。

Answer 1

您可以按以下方式从已解析的对象中使用过滤器：

Option Explicit

Sub CopySheetToAnotherWorkbook()

Dim wbk1 As Workbook:           Set wbk1 = ActiveWorkbook
Dim wbk2 As Workbook
Dim Report As Worksheet:        Set Report = ActiveWorkbook.Worksheets("Report")
Dim CopySht As Worksheet

With Report
.Cells.Copy
End With

Set wbk2 = Workbooks.Add
wbk2.SaveAs ThisWorkbook.Path & "\" & "workbooktosend.xlsx"
Set CopySht = wbk2.Sheets("Sheet1")

With Cells
.PasteSpecial (xlPasteValues)
.PasteSpecial (xlPasteFormats)
End With

ActiveWindow.DisplayGridlines = False
ActiveWindow.Zoom = 80

End Sub


Sub AddFileToMail()

Dim OutLookApp As Outlook.Application
Dim myMail As Outlook.MailItem
Dim sourcefile As String


Set OutLookApp = New Outlook.Application
Set myMail = OutLookApp.CreateItem(olMailItem)


myMail.Attachments.Add ThisWorkbook.Path & "\" & "workbooktosend.xlsx"


End Sub

Answer 2

我将简化一点，并说我们正在研究dataValue数组。

    // For each item in dataValue, check the key.
    // If it equals 'Water', return the value.
    for (let i = 0; i < dataValue.length; i++) {
        if (value['@attr']['@key'] === 'Water') {
            return value['@value'];
        }
    }

Answer 3

这将获取对象的值

var json = JSON.parse(`[{"type":1,"key":"123abc","data":{"access":"123456","data":{"dataValue":[{"@attr":{"@key":"Fire"},"@value":"Flame"},{"@attr":{"@key":"Water"},"@value":"Liquid"},{"@attr":{"@key":"Earth"},"@value":"Stone"}]}}}]`);

function getValue(dataValues, key) {
  return dataValues.find(function(item) {
    return item["@attr"]["@key"] === key;
  });
}

var dataValues = json[0].data.data.dataValue;
var dataValue = getValue(dataValues, "Water");
console.log(dataValue["@value"]);

这将为您提供每个对象的值

var json = JSON.parse(`[{"type":1,"key":"123abc","data":{"access":"123456","data":{"dataValue":[{"@attr":{"@key":"Fire"},"@value":"Flame"},{"@attr":{"@key":"Water"},"@value":"Liquid"},{"@attr":{"@key":"Earth"},"@value":"Stone"}]}}}]`);

function getValue(dataValues, key) {
  return dataValues.find(function(item) {
    return item["@attr"]["@key"] === key;
  });
}

console.log(json.map(function(jsonObject) {
  return getValue(jsonObject.data.data.dataValue, "Water")["@value"];
}));

根据另一个对象的值获取父对象的值

3 个答案: