将字符串数组序列化为json

Question

So, I've been tinkering with go and have a small problem. I have something that needs to be serialised into a json like so.

{
  "name" : "Steel", 
  "things" : ["Iron", "Carbon"]
}

The struct to hold this looks like this.

type Message struct {
    name string
    things []string

}

and my code itself like this

func main() {
    i := Message{"Steel", []string{"Iron", "Carbon"}}
    fmt.Println(i);

    b, _ := json.Marshal(i)
    fmt.Printf(" Json %v
", b);

    var o Message;
    json.Unmarshal(b, &o)
    fmt.Printf(" Decoded %v
", o);
}

When I deserialise the data though, I get back an empty Message like so

{Steel [Iron Carbon]}
 Json [123 125]
 Decoded { []}

What am I doing wrong and how do I get it to work?

Answer 1

Export fields of the struct. Unexported fields are not included by encoding/json

type Message struct {
    Name string
    Things []string
}

The field names should begin with capital letters (Exported).