How to Converting Go struct to JSON?

Question

I am trying to convert a Go struct to JSON using the json package but all I get is {}. I am certain it is something totally obvious but I don't see it. package main import ( "fmt" "encoding/json" ) type User struct { name string } func main() { user := &User{name:"Frank"} b, err := json.Marshal(user) if err != nil { fmt.Printf("Error: %s", err) return; } fmt.Println(string(b)) } Then when I try to run it I get this: {}

Gopher · Accepted Answer

You need to export the User.name field so that the json package can see it. Rename the name field to Name. package main import ( "fmt" "encoding/json" ) type User struct { Name string } func main() { user := &User{Name: "Frank"} b, err := json.Marshal(user) if err != nil { fmt.Println(err) return } fmt.Println(string(b)) } https://play.golang.org/p/erGl1eK3Bk3 Output: {"Name":"Frank"}

Go Language

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