将JSON解组到接口{}中时，它不再是必需的类型，而是映射

{
  "name": "Alice",
  "age": 30,
  "email": "alice@example.com"
}

type Person struct {
    Name  string `json:"name"`
    Age   int    `json:"age"`
    Email string `json:"email"`
}

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name  string `json:"name"`
    Age   int    `json:"age"`
    Email string `json:"email"`
}

func main() {
    jsonData := `{
        "name": "Alice",
        "age": 30,
        "email": "alice@example.com"
    }`

    var person Person
    err := json.Unmarshal([]byte(jsonData), &person)
    if err != nil {
        fmt.Println("Error unmarshaling JSON:", err)
        return
    }

    fmt.Printf("Name: %s, Age: %d, Email: %s\n", person.Name, person.Age, person.Email)
}

package main

import (
    "encoding/json"
    "fmt"
)

func main() {
    jsonData := `{
        "name": "Alice",
        "age": 30,
        "email": "alice@example.com"
    }`

    var data interface{}
    err := json.Unmarshal([]byte(jsonData), &data)
    if err != nil {
        fmt.Println("Error unmarshaling JSON:", err)
        return
    }

    fmt.Printf("Data: %+v\n", data)
}

type Person struct {
    FullName string `json:"full_name"`
    Age      int    `json:"age"`
    Email    string `json:"email"`
}

type Person struct {
    Name  string `json:"name"`
    Age   int    `json:"age"`
    Email string `json:"email"`
}

func main() {
    jsonData := `{
        "name": "Alice",
        "age": "30",  // 注意这里的age是字符串类型
        "email": "alice@example.com"
    }`

    var person Person
    err := json.Unmarshal([]byte(jsonData), &person)
    if err != nil {
        fmt.Println("Error unmarshaling JSON:", err)
        return
    }

    // 手动转换age字段类型
    age, err := strconv.Atoi(person.Age)
    if err != nil {
        fmt.Println("Error converting age to int:", err)
        return
    }
    person.Age = age

    fmt.Printf("Name: %s, Age: %d, Email: %s\n", person.Name, person.Age, person.Email)
}