json.md

JSON

json.Marshal ()

Default conversion rule:

• 1. Boolean is still Boolean after conversion to JSON, such as true-> true
• 2. Floating point and integer types are converted to regular numbers in JSON, such as 1.23-> 1.23
• 3. The string will be converted to UTF-8 encoding and output as a string of Unicode character set. Special characters such as <will be escaped as \ u003c
• 4. Arrays and slices are converted to arrays in JSON. The [] byte class is converted to a base64 encoded string, and the zero value of slice is converted to null.
• 5. The structure will be converted into a JSON object, and only the exportable fields that begin with a capital letter in the structure will be converted and output, and these exportable fields will be used as the string index of the JSON object.
• 6. When converting a map type data structure, the type of the data must be map [string] T (T can be any data type supported by the encoding / json package)

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json.Unmarshal ()

Note: If a field in the JSON does not exist in the Go target type, the json.Unmarshal () function will discard the field during decoding.
Unknown type, follow the rules:

• 1.Boolean values ​​in JSON will be converted to bool in Go
• 2. The value will be converted to float64 in Go
• 3. String type is still string type
• 4.JSON array will be converted to [] interface {} type
• 5.JSON object will be converted to map [string] interface {}
• 6.null value will be converted to nil