从Java中的JSON数组获取价值

Question

How can i get value from json array in java Output

{
    "result": "success",
    "from": "USD",
    "rates": {
        "AUD": ((AUD in terms of USD)),
        "BGN": 1.8096,
        "BRL": 3.1143,
        "...": 1.3113,
        "...": 7.473, etc. etc.
    }
}

How do i get the value of "BGN"

Answer 1

What you have above is not a JSON array.

JSON arrays looks like this:

{
 "this-is-an-array": [1, 2, 3, 4, 5]
}

What you have above are properties of an object designated to the property rates. Think of JSON as a Map of Maps and Arrays.

Below, I show you how you can iterate the properties in JavaScript. It may look like its an array but its actually a map that you access providing the key:

 var json = { "result": "success", "from": "USD", "rates": { /* "AUD": ((AUD in terms of USD)), This is not JSON. It is something else */ "BGN": 1.8096, "BRL": 3.1143, "...": 1.3113 } }; for(var prop in json.rates){ console.log("Key: " + prop + ", Value: " + json.rates[prop]); }