javascript - 检索 .json 对象并将其存储在变量中

Question

我的 .json 文件是：

{
"links":[
  {source: "algorithms cormen", target: "irodov", type: "default"},
  {source: "algorithms cormen", target: "skienna", type: "default"},
  {source: "irodov", target: "skienna", type: "default"},
  {source: "irodov", target: "algorithms cormen", type: "default"}
],
"data":[
    {node: "algorithms cormen", data: "bible of algos"},
    {node: "irodov", data: "bibile of physics"},
    {node: "skienna", data: "cool book"}
]
}

现在在我的 javascript 文件中，我希望“链接”存储的数据转到链接变量。我想对“数据”做同样的事情我如何实现这一目标？我正在使用 d3.js 库，所以如果这个库中包含一些我可以使用的功能，请提及它们。

Answer 1

只需解析 JSON 并将值分配给变量：

var json; // I am assuming this is populated with your JSON string
var jsonObj = JSON.parse(json);
var links = jsonObj.links;
var data = jsonObj.data;

Answer 2

将 json 文件更新为（假设您在页面加载时包含 json 文件而不是通过 ajax）

var json-data = { 
     "links":[
         {source: "algorithms cormen", target: "irodov", type: "default"},
         {source: "algorithms cormen", target: "skienna", type: "default"},
         {source: "irodov", target: "skienna", type: "default"},
         {source: "irodov", target: "algorithms cormen", type: "default"}
],
    "data":[
        {node: "algorithms cormen", data: "bible of algos"},
        {node: "irodov", data: "bibile of physics"},
        {node: "skienna", data: "cool book"}
    ]
} 

然后访问

var links = json-data.links; 
var data = json-data.data;