我有一个 JSON 数组，我想读取密钥答案

【问题标题】：I have a array of JSON and I want to read the key我有一个 JSON 数组，我想读取密钥
【发布时间】：2020-08-25 04:53:32
【问题描述】：

我有一个 JSON 数组，我想读取键“bno”并在 textarea 中打印它的值。

我希望 jquery 代码读取 bnm 或 bno 等键。

{
"AdditionalAddress": [
{
  "addr": 
   {
    "bnm": "",
    "bno": "B2 B3",
    "city": "",
    "dst": "Gautam Buddha Nagar",
    "flno": "",
    "lg": "",
    "loc": "Noida",
    "lt": "",
    "pncd": "201301",
    "st": "Sector 16",
    "stcd": "Uttar Pradesh"
  },  
},
{
  "addr":
  {
    "bnm": "",
    "bno": "Shop No. 1, 3 to 16, Block No 51",
    "city": "",
    "dst": "Agra",
    "flno": "",
    "lg": "",
    "loc": "Sanjay Place, Agra",
    "lt": "",
    "pncd": "282002",
    "st": "Anupam Plaza II",
    "stcd": "Uttar Pradesh"
  },
},
}

我有这个 jquery 代码，但它的抛出错误“未定义”。

$.ajax({
    url: "abc.json",
    dataType: "json",
    success: function (data) {
        console.log(data);
        $.each(data.AdditionalAddress, function (i, val) {
            $.each(val.addr, function (j, k) {
                console.log(k.bno);
            });
        });
    }
});

【问题讨论】：

标签： jquery arrays json

【解决方案1】：

使用x.addr.bno 使用$.each 从您的JSON 中获取bno - 此外，您不需要使用$.each 两次，只需使用一次，如下所示：

$.each(myJSON.AdditionalAddress, function(j, k) {
  console.log(k.addr.bno) //both bno
});

您可以阅读 keys 的其余部分以及您希望使用 .dot notation 的密钥到 access 的 value

现场演示：

var myJSON = {
  "AdditionalAddress": [{
      "addr": {
        "bnm": "",
        "bno": "B2 B3",
        "city": "",
        "dst": "Gautam Buddha Nagar",
        "flno": "",
        "lg": "",
        "loc": "Noida",
        "lt": "",
        "pncd": "201301",
        "st": "Sector 16",
        "stcd": "Uttar Pradesh"
      },
    },
    {
      "addr": {
        "bnm": "",
        "bno": "Shop No. 1, 3 to 16, Block No 51",
        "city": "",
        "dst": "Agra",
        "flno": "",
        "lg": "",
        "loc": "Sanjay Place, Agra",
        "lt": "",
        "pncd": "282002",
        "st": "Anupam Plaza II",
        "stcd": "Uttar Pradesh"
      },
    }
  ]
}

$.each(myJSON.AdditionalAddress, function(j, k) {
  console.log(k.addr.bno)
});

&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"&gt;&lt;/script&gt;

【讨论】：