访问JSON对象以获取Resource Bundle键/值对

Question

I know how to access key value pair from JSON object but in my case, the resource bundle keys are mapped to values.

eg

var json = {"label.name.first":"foo","label.name.second":"bar"};

Here json.label.name.first doesn't give me "foo".

Can someone help me with this?

Answer 1

Due to using the period character ( . ) in the key name, you need to use the [] notation to access its value.

console.log( json['label.name.first'] );

Additionally, you have a JavaScript object, not JSON.

---

The difference between a JavaScript object or JSON is that JSON is always a string. Secondly, JavaScript objects don't require the same quote standards on the key names.

If you just consider the string below, then yes it can be considred JSON (this is why if you paste it into a JSON parser, it tells you it's valid JSON):

{"label.name.first":"foo","label.name.second":"bar"}

However, if you assign that directly to a JavaScript variable then you have a JavaScript object literal, not JSON. This is because JSON is also a valid JavaScript object/array literal when it is not contained in a string:

var obj = {"label.name.first":"foo","label.name.second":"bar"};

If you were to use it as a string, then it is JSON:

var json = '{"label.name.first":"foo","label.name.second":"bar"}';
// json is a string, so it's JSON
var obj = JSON.parse(json); // parse the JSON into an object

The confusion is quote common because the JSON format is very similar to the format of JavaScript object and array literals.

Answer 2

Do this:

json["label.name.first"]

However, I think you are misunderstanding the . notation.

And BTW your json isn't a JSON, it is a javascript object and not its notation.

Answer 3

It's json["label.name.first"] that would get you "foo" . Since your property's name contains characters that cannot be used in variable names.

If you're expecting to access these properties using the syntax json.label.name.first then your JSON needs to be:

var json = {
    "label":{
         "name":{
             "first":"foo",
             "second":"bar"
         }
    }
}

Answer 4

This is not right way to create object, you should create one like this.

var json={"label":{"name":{"first":"foo","second":"bar"}}};  

it will also work as json string