Format JSON with indentation in Go [duplicate]

Question

After I do

 json, err := json.Marshal(buf)

I get something like:

{"a":123,"b":"abc"}

But what I want is an indented version of this:

{ "a": 123, "b": "abc" }

How?

You want to see it formatted in chrome browser then use JSON Formatter extension. — Rakib
– Rakib, Commented Aug 27, 2017 at 7:59

wasmup · Accepted Answer · 2017-08-27 08:02:42Z

31

Use json.MarshalIndent(group, "", "\t"), try this:

package main import ( "encoding/json" "fmt" "os" ) func main() { type ColorGroup struct { ID int Name string Colors []string } group := ColorGroup{ ID: 1, Name: "Reds", Colors: []string{"Crimson", "Red", "Ruby", "Maroon"}, } b, err := json.MarshalIndent(group, "", "\t") if err != nil { fmt.Println("error:", err) } os.Stdout.Write(b) }

output:

{ "ID": 1, "Name": "Reds", "Colors": [ "Crimson", "Red", "Ruby", "Maroon" ] }

answered Aug 27, 2017 at 8:02

wasmup

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5 Comments

Nikolai Ehrhardt Over a year ago

Is there any way to have lists of basic types not linebreaked?

wasmup Over a year ago

@NikolaiEhrhardt: You may write Custom JSON Marshalling yourself.

Nikolai Ehrhardt Over a year ago

yes, will become a lot of work =). I also assume it should be possible, with reflect and whatsoever.

wasmup Over a year ago

@NikolaiEhrhardt: regexp: (\[[^[\]]+\]) Try this

Nikolai Ehrhardt Over a year ago

I only want to format lists of basic types...

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