json to Value,disordered arrangement order, how can we keep it as it is?

[zhangwuqiao]

I have a project where the key values in the passed in JSON are uncertain, but they must be analyzed and processed in the order in which they were passed in. However, when converting JSON to Value, the order is out of order. How to use 'from_str' Convert to Value in the order in which it is passed in?

Eg:

[kangalio]

See the preserve_order feature

json/Cargo.toml

Lines 58 to 61 in 931ee23

	# Make serde_json::Map use a representation which maintains insertion order.
	# This allows data to be read into a Value and written back to a JSON string
	# while preserving the order of map keys in the input.
	preserve_order = ["indexmap", "std"]