Question

我是Node.js的新手，这是我的示例json格式数据。我想将它们拆分为json格式，并需要获取tid值。在node.js中，我尝试使用JSON.parse（data），但发生了错误（由于[]符号）。有没有一种简单的方法可以将它们拆分为json格式并获取tid值？

[{"date":1535624757,"date_ms":1535624757427,"amount":90.389717,"price":0.00860497,"type":"buy","tid":251916659},{"date":1535624757,"date_ms":1535624757428,"amount":99.428689,"price":0.00860497,"type":"buy","tid":251916662},{"date":1535624757,"date_ms":1535624757469,"amount":384.65968,"price":0.00860497,"type":"buy","tid":251916663}]

Answer 1

似乎您正在尝试使用Javascript对象而不是包含JSON编码数据的字符串。考虑直接使用该对象。例如，您可以使用for循环来迭代data的元素，如下所示：

const data =  [ {"date":1535624757,"date_ms":1535624757427,"amount":90.389717,"price":0.00860497,"type":"buy","tid":251916659},{"date":1535624757,"date_ms":1535624757428,"amount":99.428689,"price":0.00860497,"type":"buy","tid":251916662},{"date":1535624757,"date_ms":1535624757469,"amount":384.65968,"price":0.00860497,"type":"buy","tid":251916663}];

for (var i = 0; i < data.length; i++) {
  console.log(data[i].tid);
}

Answer 2

JSON.parse带有一个字符串变量，[{"date":1535624757,"date_ms":1535624757427,"amount":90.389717,"price":0.00860497,"type":"buy","tid":251916659},{"date":1535624757,"date_ms":1535624757428,"amount":99.428689,"price":0.00860497,"type":"buy","tid":251916662},{"date":1535624757,"date_ms":1535624757469,"amount":384.65968,"price":0.00860497,"type":"buy","tid":251916663}]您编写的这段代码是对象变量。

您可以使用此

var data = JSON.parse('[{"date":1535624757,"date_ms":1535624757427,"amount":90.389717,"price":0.00860497,"type":"buy","tid":251916659},{"date":1535624757,"date_ms":1535624757428,"amount":99.428689,"price":0.00860497,"type":"buy","tid":251916662},{"date":1535624757,"date_ms":1535624757469,"amount":384.65968,"price":0.00860497,"type":"buy","tid":251916663}]') console.log(data)

Answer 3

由于您发布的数组在JavaScript程序的上下文中是 not JSON（尽管它是valid standalone JSON document），所以假设data是您的值数组：

const data = [{
  "date":1535624757,
  "date_ms":1535624757427,
  "amount":90.389717,
  "price":0.00860497,
  "type":"buy",
  "tid":251916659
}, {
  "date":1535624757,
  "date_ms":1535624757428,
  "amount":99.428689,
  "price":0.00860497,
  "type":"buy",
  "tid":251916662
}, { 
  "date":1535624757,
  "date_ms":1535624757469,
  "amount":384.65968,
  "price":0.00860497,
  "type":"buy",
  "tid":251916663
}];

您可以像这样拉出提示：

const tids = data.map(e => e.tid);

提示：

[ 251916659, 251916662, 251916663 ]

如果您想将tid作为JSON字符串，则可以使用JSON.stringify：

const jsonTids = JSON.stringify(tids);

jsonTids：

'[251916659,251916662,251916663]'

Answer 4

由于JSON对象位于数组（[]符号）内，因此您必须通过数组中的JSON索引来引用JSON对象。像这样。

const data = [{"date":1535624757,"date_ms":1535624757427,"amount":90.389717,"price":0.00860497,"type":"buy","tid":251916659},{"date":1535624757,"date_ms":1535624757428,"amount":99.428689,"price":0.00860497,"type":"buy","tid":251916662},{"date":1535624757,"date_ms":1535624757469,"amount":384.65968,"price":0.00860497,"type":"buy","tid":251916663}];

console.log(data[0]);

Here's some info在数组上是它们的索引。

如何在Node JS中从JSON格式拆分字符串

4 个答案: