我有一個以字節數組作為字段的結構。這是代碼：package mainimport ( "fmt" "gopkg.in/yaml.v3")type A struct { PublicKey []byte `json:"PublicKey" yaml:"PublicKey"`}// Implements the Marshaler interface of the yaml pkg.func (a A) MarshalYAML() (interface{}, error) { type alias A node := yaml.Node{} _ = node.Encode(alias(a)) return node, nil}func PublicKey() { token := []byte{87, 88, 89, 90} a := A{PublicKey: token} fmt.Printf("A: %+v\nA.PublicKey:%s\n\n", a, a.PublicKey) out, _ := yaml.Marshal(a) fmt.Println(string(out))}func main() { PublicKey()}這是輸出：A: {PublicKey:[87 88 89 90]}A.PublicKey:WXYZPublicKey: - 87 - 88 - 89 - 90是否可以讓 marshal-er 將其輸出為字符串而不是字節數組？例如：PublicKey: WXYZ
1 回答
慕桂英3389331
TA貢獻2036條經驗 獲得超8個贊
與其自定義編解碼器，不如A為公鑰創建自定義類型并使用 Base64 對其值進行編碼/解碼
type PubKey []byte
func (pk PubKey) MarshalYAML() (interface{}, error) {
return base64.StdEncoding.EncodeToString(pk), nil
}
func (pk *PubKey) UnmarshalYAML(node *yaml.Node) error {
value := node.Value
ba, err := base64.StdEncoding.DecodeString(value)
if err != nil {
return err
}
*pk = ba
return nil
}
type A struct {
PublicKey PubKey `json:"PublicKey" yaml:"PublicKey"`
}
// No custom YAML codec
編碼/解碼是這樣的：
func PublicKey() {
token := []byte{87, 88, 89, 90}
a := A{PublicKey: token}
fmt.Printf("A: %+v\nA.PublicKey:%s\n\n", a, a.PublicKey)
out, _ := yaml.Marshal(a)
fmt.Println("Encoded: ", string(out))
var b A
err := yaml.Unmarshal(out, &b)
if err != nil {
println(err)
}
fmt.Printf("after decoding: %+v\n", b)
}
完整示例https://go.dev/play/p/2_gMi9sazIp
結果是：
A: {PublicKey:[87 88 89 90]}
A.PublicKey:WXYZ
Encoded: PublicKey: V1hZWg==
after decoding: {PublicKey:[87 88 89 90]}
順便說一句，base64 是編解碼器如何json編組字節切片 示例與您的數據：https://go.dev/play/p/dGr0i0DnnNX
A: {PublicKey:[87 88 89 90]}
A.PublicKey:WXYZ
Encoded JSON: {"PublicKey":"V1hZWg=="}
after decoding JSON: {PublicKey:[87 88 89 90]}
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