我正在尝试读取Golang中的JSON文件,修改此JSON文件,然后创建一个新的JSON文件/写入此JSON文件。我在网上看过几个样本,但似乎无法将两个和两个样本放在一起以获得所需的结果。我尝试在GO中制作自己的JSON str并修改它,但仍然失败了。
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我已经多次尝试阅读该文件,下面是我最好的尝试:
package main
import (
"encoding/json"
"fmt"
)
type Person struct {
Name string
Age int
Details interface{}
}
func main() {
//I created a simple Json structure here to play with
str := `{"name": "A",
"age":20,
"details": {"salary":100000000}
}`
var data Person
err := json.Unmarshal([]byte(str), &data)
if err != nil {
panic(err)
}
//I make a map so that I can adjust the value of the salary
details, ok := data.Details.(map[string]interface{})
if ok {
details["salary"] = 999999
}
//Change the other values of a Person
data.Name = "B"
data.Age = 19
fmt.Println(data)
//SAMPLE OUTPUT: {B 19 map[salary:999999]}
}
这是一个示例输出:
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
)
/* Create the structure that follows the outline of the JSON file*/
type UserType struct {
User []struct {
CdbID string `json:"cdb_id"`
Firstname string `json:"firstname"`
Lastname string `json:"lastname"`
Phone int64 `json:"phone"`
Email string `json:"email"`
Address []struct {
Street string `json:"street"`
City string `json:"city"`
Zip string `json:"zip"`
Country string `json:"country"`
} `json:"address"`
Authenticators []struct {
Name string `json:"name"`
Phone int64 `json:"phone"`
} `json:"authenticators"`
VoiceSig string `json:"voice_sig"`
VoicesigCreatedTime string `json:"voicesig_created_time"`
Status string `json:"status"`
} `json:"user"`
}
func main() {
file, err := ioutil.ReadFile("user.json") //Read File
if err != nil {
fmt.Print("Error:", err)
}
var u UserType
json.Unmarshal(file, &u) //Parse the Json-encoded Data and store the results in u
result, e := json.Marshal(u) //Returns the Json encoding of u into the variable result
if e != nil {
fmt.Println("error", err)
}
os.Stdout.Write(result) //The line of code golang.org uses to print the Json encoding
}
我很困惑如何修改我想要的东西,特别是" Authenticators"上述样本输出。谢谢!
答案 0 :(得分:1)
添加声明
type Authenticator struct {
Name string `json:"name"`
Phone int64 `json:"phone"`
}
并更改
Authenticators []struct {
Name string `json:"name"`
Phone int64 `json:"phone"`
} `json:"authenticators"`
到
Authenticators []Authenticator `json:"authenticators"`
然后,向第一个用户添加验证器:
u.User[0].Authenticators = append(u.User[0].Authenticators, Authenticator{
Name: "John Doe",
Phone: 1234567890,
})