json的使用

1.把取到的字符串变成json对象，然后通过点语法来访问这些值。如下：

var serverJSON:String = '{ "programmers": [{ "firstName": "Brett", "lastName":"McLaughlin", "email": "[email protected]" },{ "firstName": "Jason", "lastName":"Hunter", "email": "[email protected]" }, { "firstName": "Elliotte", "lastName":"Harold", "email": "[email protected]" }],"authors": [{ "firstName": "Isaac", "lastName": "Asimov", "genre": "science fiction" },{ "firstName": "Tad", "lastName": "Williams", "genre": "fantasy" },{ "firstName": "Frank", "lastName": "Peretti", "genre": "christian fiction" }],"musicians": [{ "firstName": "Eric", "lastName": "Clapton", "instrument": "guitar" },{ "firstName": "Sergei", "lastName": "Rachmaninoff", "instrument": "piano" }]}'

var s:Object = JSON.decode(serverJSON);

//开始使用

trace(s.programmers[0].firstName);//输出：Brett

2.把一个对象变成json字符串，如下：

import json.*;

var myObject:Object = new Object();

myObject.ab = "adfsdf";

myObject.cd = Math.random();

trace(JSON.encode( myObject ));//输出：{"ab":"adfsdf","cd":0.0599129400216043}

或者也可以直接拼出JSON字符串- -！