当我们将空的Json解组到golang中的struct时会发生什么？

Question

I have a problem with parsing empty JSON string into a struct in Golang. In the playground, when I run this code, the marshal function returns unexpected end of JSON input. But is this the official return of Golang when we parsing an empty JSON string into a struct?

package main

import (
    "encoding/json"
    "fmt"
)

var respBytes = []byte{}

type ResultStruct struct {
    result []map[string]string
}

func main() {
    var jsonData ResultStruct
    err := json.Unmarshal(respBytes, &jsonData)
    fmt.Println(err)

}

Answer 1

For this line: var respBytes = []byte{} You have created an empty byte slice. Which json.Unmarshaldoc will not parse it properly. Because Empty is not a valid JSON string.

This is how to unmarshal an "Empty" JSON string:

var respBytes = []byte(`{}`)

Go JSON example