How to Get Sorted JSON Keys When Marshalling in Go?

How to Marshall JSON with Sorted Keys in Go?

Python provides a straightforward method for generating JSON with sorted keys using the sort_keys=True parameter in the json.dumps function. However, finding a similar option in Go may not be immediately apparent.

To achieve sorted JSON key ordering in Go:

The Go json package automatically sorts keys during marshalling. This behavior extends to both maps and structs:

• Map keys are sorted lexicographically.
• Struct keys are marshalled in the order defined in the struct.

The underlying implementation can be found in the encoding/json/encode.go file, specifically at the following location:

• http://golang.org/src/pkg/encoding/json/encode.go?#L359

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