如何使用 javascript/jquery 访问 json 数组的元素? [英] How to access elements of json array using javascript/jquery?

问题描述

我有一个这样的 json 数组

I have a json array like this

AlreadySaved:[  
{  
  "SNO":1,
  "SNUMBER":"827",
  "STARTDATE":"11/12/2016",
  "STARTTIME":"03:06:50 PM",
  "ITEMNAME":"KBand",
  "ITEMCODE":"KB2541",
  "ITEMSKUNAME":"Band",
  "ITEMSKUCODE":"BT102",
  "SALESRATE":100.0,
  "PURCHASERATE":5.0,
  "DOE":"~",
  "STOCKQTY":2.0,
  "PHYSICALQTY":1.0
}
]

我需要获取 PHYSICALQTY 的值并将其显示在警报中.我是 jquery/javascript 的新手，因此将不胜感激.

I need to fetch value of PHYSICALQTY and display it in alert.I am new to jquery/javascript so any help would be appreciated.

推荐答案

你可以像访问 js 中的普通对象一样通过点表示法访问 json.

You can access json like normal objects in js via dot notation.

var json = {"STOCKQTY":2.0,"PHYSICALQTY":1.0};

console.log(json.PHYSICALQTY);

如果你已经将这个json保存在另一个对象下你需要更深入，例如

If you Have saved this json under another object You need to go deeper, eg.

var response = {AlreadySaved: [{"STOCKQTY":2.0,"PHYSICALQTY":1.0}] };

console.log(response.AlreadySaved[0].PHYSICALQTY);

还请记住，在某些情况下，您可能将 json(例如来自响应)作为字符串而不是对象.

Please remember also that in some cases You may have json (eg from response) as string not object.

console.log(typeof someJson); //string

在这种情况下，您需要将此字符串解析为 json

In that cases You need to parse this string into json

var json = JSON.parse(someJsonAsString);

快乐黑客！

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