如何在GO中访问JSON的字段

Question

Hi everyone I'm trying to see what the proper way of accessing fields of a json object from a http.get request in go.

I first do an http.get call get the JSON and then print it (which works) but is there a way to access just a field?

for example:

response, err:= http.Get("URL")
//Error checking is done between
contents, err:=ioutil.Readall(response.Body)

//Now at this point I have a json that looks like
{"id": "someID", 
"name": "someName", 
"test": [{"Name":"Test1", 
          "Result": "Success"},
         {"Name":"Test2", 
          "Result": "Success"},
         {...},
]}

Is there a way to only print the "test" of the Json? What is the proper way of accessing that field?

Answer 1

Use encoding/json package to Unmarshal data into struct, like following.

type Result struct {
    ID   string        `json:"id"`
    Name string        `json:"name"`
    Test []interface{} `json:"test"`
}

var result Result
json.Unmarshal(contents, &result)
fmt.Println(result.Test)

You can also parse Test to specific struct.