JSON or JavaScript Object Notation is a lightweight text-based open standard designed for human-readable data interchange. Conventions used by JSON are known to programmers which include C, C++, Java, Python, Perl etc.
- JSON stands for JavaScript Object Notation.
- This format was specified by Douglas Crockford.
- This was designed for human-readable data interchange
- It has been extended from the JavaScript scripting language.
- The filename extension is .json
- JSON Internet Media type is application/json
- The Uniform Type Identifier is public.json
Uses of JSON
- It is used when writing JavaScript based application which includes browser extension and websites.
- JSON format is used for serializing & transmitting structured data over network connection.
- This is primarily used to transmit data between server and web application.
- Web Services and API.s use JSON format to provide public data.
- It can be used with modern programming languages.
Characteristics of JSON
- Easy to read and write JSON.
- Lightweight text based interchange format
- Language independent.
Simple Example in JSON
Example shows Books information stored using JSON considering language of books and there editions:
{ "book": [ { "id":"01", "language": "Java", "edition": "third", "author": "Herbert Schildt" }, { "id":"07", "language": "C++", "edition": "second" "author": "E.Balagurusamy" }] }
After understanding the above program we will try another example, let's save the below code asjson.htm:
<html> <head> <title>JSON example</title> <script language="javascript" > var object1 = { "language" : "Java", "author" : "herbert schildt" }; document.write("<h1>JSON with JavaScript example</h1>"); document.write("<br>"); document.write("<h3>Language = " + object1.language+"</h3>"); document.write("<h3>Author = " + object1.author+"</h3>"); var object2 = { "language" : "C++", "author" : "E-Balagurusamy" }; document.write("<br>"); document.write("<h3>Language = " + object2.language+"</h3>"); document.write("<h3>Author = " + object2.author+"</h3>"); document.write("<hr />"); document.write(object2.language + " programming language can be studied " + "from book written by " + object2.author); document.write("<hr />"); </script> </head> <body> </body> </html>
Now let's try to open json.htm using IE or any other javascript enabled browser, this produces the following result:
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