AS3CoreLib JSON serialization

• Author: 柳大·Poechant（鍾超）
• Email: zhongchao.ustc#gmail.com (# -> @)
• Blog:Blog.CSDN.net/Poechant
• Date: May 2^nd, 2012

Example #1: Directly generate JSON object

How to generate a JSON object directly?

package {
    import com.adobe.serialization.json.JSON;
    import flash.display.Sprite;
    public class test3 extends Sprite {
        public function test3() {
            var str:String = "{\"nations\": " +
                "[{\"country\":\"P.R.China\", \"capital\":\"Beijing\"}, " +
                "{\"country\":\"U.S.\", \"capital\":\"Washington D.C.\"}]" +
                "}";
            var json:Object = new Object();
            json = JSON.decode(str);
            trace(json.nations[0].country);
        }
    }
}

Output:

P.R.China

Example #2: Serialize an object to JSON

You can serialize an object containing primary type members to a JSON object. RememberPRIMARY.

package {
    import com.adobe.serialization.json.JSON;
    import flash.display.Sprite;
    import flash.utils.ByteArray;
    public class test3 extends Sprite {
        public function test3() {
            var example:Example = new Example();
            example._int = 3;
            example._number = 4.5;
            example._string = "hello";
            example._boolean = true;
            var json:String = JSON.encode(example);
            trace(json);
        }
    }
}

import flash.utils.ByteArray;
class Example {
    public var _int:int;
    public var _number:Number;
    public var _string:String;
    public var _boolean:Boolean;
    public function Example() {
    }
}

output:

{"_number":4.5,"_boolean":true,"_int":3,"_string":"hello"}

Can a ByteArray be serialized to a JSON?

Yes, but…

package {
    import com.adobe.serialization.json.JSON;
    import flash.display.Sprite;
    import flash.utils.ByteArray;
    public class test3 extends Sprite {
        public function test3() {
            var example:Example = new Example();
            example._int = 3;
            example._number = 4.5;
            example._string = "hello";
            example._boolean = true;
            example._byteArray.writeInt(1234);
            var json:String = JSON.encode(example);
            trace(json);            
            var result:Object = new Object();
            result = JSON.decode(json);
            trace(result._byteArray);
        }
    }
}

import flash.utils.ByteArray;
class Example {
    public var _int:int;
    public var _number:Number;
    public var _string:String;
    public var _boolean:Boolean;
    public var _byteArray:ByteArray;    
    public function Example() {
        _byteArray = new ByteArray();
    }
}

You will see the output:

{"_byteArray":{"length":4,"position":4,"bytesAvailable":0,"objectEncoding":3,"endian":"bigEndian"},"_number":4.5,"_boolean":true,"_int":3,"_string":"hello"}
[object Object]

Yes, only those member of primary types are serialized into JSON result…So CAUTION! When you wanna use JSON, just keep your eyes on PRIMARY types.

Reference

1. JSON - ActionScript® 3.0 Reference for the Adobe® Flash® Platform
2. Github - mikechambers/as3corelib
3. JSON掃盲帖+JSON類教程

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轉載請註明來自柳大的CSDN部落格：Blog.CSDN.net/Poechant

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