Creating Function to Parse JSON Data using substring

问题

i'm working in AS2 & it's looks like javascript alot

JSON

{
   "name": "Tom",
   "age": 20,
   "state": "usa"
}

now i cant parse JSON data in AS2 & need workaround function using substring something like that below and i load json file using loadVars()

var _lv:LoadVars = new LoadVars()
_lv.onData = function(data)
{
    var ex:Object = eval("data");
 var JSONTOArray:Object = ex.toString().split(',');
 var getname=JSONtoArray[0].substring(JSONtoArray[0].lastIndexOf('"name": "')+9,JSONtoArray[0].lastIndexOf('"')); 
}
_lv.load("MyJSON_URL");

now need to build function like

getThis('name'); // return Tom
getThis('age'); // return 20
getThis('state'); // return usa

回答1:

The best solution is to use existing parser, because

1. you will not have to write your own code
2. it probably has common syntax like JSON.parse and JSON.stringify

回答2:

var abc={
   "name": "Tom",
   "age": 20,
   "state": "usa"
};
console.log(abc['name']);     //Tom
console.log(abc['age']);      //20
console.log(abc['state']);    //usa

回答3:

To parse a json data using ActionScript 2, you can use the JSON.as class ( from JSON.org ), after putting it in the same directory as your .fla, you can use it like this :

import JSON;

var json = new JSON();

var loader:LoadVars = new LoadVars();
    loader.onData = function(data)
    {   
        trace(json.parse(data).name);   // gives : Tom
    }
    loader.load('file.json');

Hope that can help.

来源：https://stackoverflow.com/questions/29343674/creating-function-to-parse-json-data-using-substring