Five Elements of JSON Syntax: graphic introduction _ basic knowledge

JSON syntax is a lightweight data exchange format, which is easy to read and write. This article will introduce in detail. For details, refer to JSON syntax, which is a lightweight data exchange format. Easy to read and write. At the same time, it is easy to parse and generate machines. I hope this article will teach you more things.

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JSON syntax

The JSON syntax is simple, that is, braces '{}', braces '[]', comma ',', colons ':', and double quotation marks '. Data Type: Nested object, array, String, number, Boolean value, or null value.

1) The object is an unordered set of 'name/value' pairs. An object starts with "{" (left parenthesis) and ends with "}" (right Parenthesis. Each "name" is followed by a ":" (colon); "," (comma) is used to separate the "name/value" pairs.

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2) An array is an ordered set of values. An array starts with "[" (left square brackets) and ends with "]" (right square brackets. Values are separated by commas.

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3) JSON syntax can be string, number, true, false, null, object, or array enclosed by double quotation marks ). These structures can be nested.

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4) A string is a collection of any number of Unicode characters enclosed by double quotation marks. It is escaped using a backslash. A character (character) is a separate string (character string ). A string is very similar to a C or Java string.

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5) The JSON syntax is very similar to the values in C or Java. Remove unused octal and hexadecimal formats. Except for some encoding details.

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