Detailed explanation of Json format

JSON ( JavaScript Object Notation ) is a lightweight data exchange format. It is easy to read and understand, and easy for machines to parse and generate. JSON uses a language-independent text format and uses conventions similar to the C language family (including C, C++, C#, Java, JavaScript, Perl, Python, etc.). These features make JSON an ideal data exchange language.

A JSON is built on two structures:

A collection of name/value pairs. In different languages, this is understood as an object, record, struct, dictionary, hash table, keyed list, or associative array. An ordered list of values. In most languages, this is understood as an array.

2. JSON format

1. Object

An object is an unordered collection of name/value pairs. An object starts with a "{" (left bracket) and ends with a "}" (right bracket). Each "name" is followed by a ":" (colon); "name/value" pairs are separated by "," (commas).

2. Arrays

An array is an ordered collection of values. An array starts with "[" (left bracket) and ends with "]" (right bracket). Use "," (comma) to separate values.

The content of the three values

value can be a string enclosed in double quotes, a number , true , false , null , an object , or an array . These structures can be nested.

string is a collection of any number of Unicode characters enclosed in double quotes, using backslash escapes. A character is a single character string .

A string is very similar to a string in C or Java.

number are also very similar to numbers in C or Java. Remove unused octal and hexadecimal formats. Remove some encoding details.

Four Examples

Note: The string must be enclosed in double quotes.

Arrays and objects can be nested within arrays

{
    "name": "BeJson",
    "url": "http://www.bejson.com",
    "page": 88,
    "isNonProfit": true,
    "address": {
        "street": "Technology Park Road.",
        "city": "Suzhou, Jiangsu",
        "country": "China"
    },
    "links": [
        {
            "name": "Google",
            "url": "http://www.google.com"
        },
        {
            "name": "Baidu",
            "url": "http://www.baidu.com"
        },
        {
            "name": "SoSo",
            "url": "http://www.SoSo.com"
        }
    ]
}

Summarize

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