Research on lightweight interactive data JSON format

[W3cschool Tydef]
What is JSON?
JSON refers to JavaScript Object notation (JavaScript Notation)
JSON is a lightweight text data interchange Format
JSON Independent of Language *
JSON is self-descriptive and easier to understand
* JSON uses JAVASCRIPT syntax to describe data objects, but JSON is still independent of language and platform. The JSON parser and the JSON library support many different programming languages.
JSON syntax is a subset of JavaScript syntax.

Why do you use JSON
When sending and receiving information in an asynchronous application, you can choose to use plain text and XML as the data format. Mastering this phase of Ajax discusses another useful data format for JavaScript object Notation (JSON), and how to use it to move data and objects more easily in your application.
Simply put, JSON can convert a set of data represented in a JavaScript object into a string, which can then be easily passed between functions, or in an asynchronous application passing a string from a WEB client to a server-side program. The string looks a bit odd (see a couple of examples later), but JavaScript is easy to explain, and JSON can represent a more complex structure than name/value pairs.

Characteristics
Like XML
JSON is plain text
JSON has a "self-descriptive" (Human readable)
JSON has a hierarchy (values exist in values)
JSON can be parsed with JavaScript
JSON data can be transmitted using AJAX

Compared to the difference between XML
No end tag
Even shorter
Read and write faster
Ability to parse using the built-in JavaScript eval_r () method
Working with arrays
Do not use reserved words

Using JSON
Reading JSON strings
Processing JSON strings with Eval_r ()

JSON C + + API very good blog, all.
Http://hi.baidu.com/jiangyangw3r/blog/item/bfedc1ce59b23e0c92457e14.html

An example of a C + + hit JSON package
#include

Class Jsonguard
{

Public
Jsonguard (Json_object *obj): m_obj (obj) {}
~jsonguard () {
Json_object_put (m_obj);
}
Private
Json_object *m_obj;
};

void Testjson ()
{
cout << "Test json begin!" << Endl;
Json_object *obj = Json_object_new_object ();
Jsonguard Jsonguard (obj);
Hit a student in the JSON format for information
int id = 1;
Json_object_object_add (obj, "id", Json_object_new_int (ID));
String name ("Huangfengxiao");
Json_object_object_add (obj, "name", Json_object_new_string (Name.c_str ()));

Json_object *subobj = Json_object_new_object ();//subobj
String Mathadd ("A-404");
Json_object_object_add (subobj, "math", Json_object_new_string (Mathadd.c_str ()));
String Chineseadd ("A-404");
Json_object_object_add (Subobj, "Chineseadd", Json_object_new_string (Chineseadd.c_str ()));
Json_object_object_add (obj, "subjectaddr", subobj);

const char *jsdata = json_object_to_json_string (obj);
cout<<jsdata<<endl;
cout << "Test json end!" << Endl;
}

Research on lightweight interactive data JSON format