我有一个用户的JSON文档,其中包含ID#,Phone#和Email。输入另一个ID,电话和电子邮件后,我想获取新用户的信息并将其附加到文件中。我有一个只包含{ID:#,Phone:#,Email:#}的结构,并且工作正常。但是我的JSON文件变成了这样:
[{"ID":"ABCD","Phone":1234567890,"Email":"johndoe@test.com"}]
[{"ID":"EFGH","Phone":1234567890,"Email":"johndoe@test.com"}]
[{"ID":"IJKL","Phone":1234567890,"Email":"johndoe@test.com"}]
[{"ID":"MNOP","Phone":1234567890,"Email":"johndoe@test.com"}]
[{"ID":"QRST","Phone":1234567890,"Email":"johndoe@test.com"}]
[{"ID":"UVWX","Phone":1234567890,"Email":"johndoe@test.com"}]
所以我能够附加到文档,但它是一个用方括号[]括起来的新JSON结构。以下是我的代码。我省略了实际的散列ID。
func ToIds(e string, p int64) {
hashed := GenId()
var jsonText = []byte(`[
{"ID": "", "Phone": 0, "Email": ""}
]`)
var I Identification
err := json.Unmarshal([]byte(jsonText), &I)
if err != nil {
fmt.Println(err)
}
I[0].ID = hashed
I[0].Phone = p
I[0].Email = e
result, error := json.Marshal(I)
if error != nil {
fmt.Println(error)
}
f, erro := os.OpenFile("FILE_PATH", os.O_APPEND|os.O_WRONLY, 0666)
if erro != nil {
fmt.Println(erro)
}
n, err := io.WriteString(f, string(result))
if err != nil {
fmt.Println(n, err)
}
}
这可能有用,这是我的识别结构。
type Identification []struct {
ID string
Phone int64
Email string
}
基本上,我想要外部括号,在这些括号内我想要附加多个用户。像这样:
[
{"id":"A", "phone":17145555555, "email":"tom@gmail.com"},
{"id":"B","phone":15555555555,"email":"p@gmail.com"},
{"id":"C","phone":14155555555,"email":"bradley@gmail.com"},
{"id":"D","phone":17135555555,"email":"g@gmail.com"},
{"id":"E","phone":17125555555,"email":"ann@gmail.com"},
{"id":"F","phone":17125555555,"email":"sam@gmail.com"},
{"id":"G","phone":14055555555,"email":"john@gmail.com"},
{"id":"H","phone":13105555555,"email":"lisa@gmail.com"}
]
答案 0 :(得分:4)
要实现输出,请按以下方式定义struct -
type Identification struct {
ID string
Phone int64
Email string
}
按如下方式进行操作 -
// define slice of Identification
var idents []Identification
// Unmarshall it
err := json.Unmarshal([]byte(jsonText), &idents)
// add further value into it
idents = append(idents, Identification{ID: "ID", Phone: 15555555555, Email: "Email"})
// now Marshal it
result, error := json.Marshal(idents)
// now result has your targeted JSON structure
以上解释的示例程序https://play.golang.org/p/67dqOaCWHI