如何使用Golang处理JSON序列化与反序列化

package main

import (
    "encoding/json"
    "fmt"
)

type User struct {
    Name     string `json:"name"`
    Age      int    `json:"age"`
    Email    string `json:"email,omitempty"` // 当Email为空时不输出
    Password string `json:"-"`               // 不参与序列化
}

func main() {
    user := User{
        Name:     "Alice",
        Age:      30,
        Email:    "alice@example.com",
        Password: "secret",
    }

    data, err := json.Marshal(user)
    if err != nil {
        panic(err)
    }

    fmt.Println(string(data))
    // 输出：{"name":"Alice","age":30,"email":"alice@example.com"}
}

func main() {
    jsonData := `{"name":"Bob","age":25,"email":"bob@example.com"}`

    var user User
    err := json.Unmarshal([]byte(jsonData), &user)
    if err != nil {
        panic(err)
    }

    fmt.Printf("%+v\n", user)
    // 输出：{Name:Bob Age:25 Email:bob@example.com Password:}
}

func main() {
    jsonData := `{"name":"Charlie","hobbies":["reading","coding"]}`

    var data map[string]interface{}
    json.Unmarshal([]byte(jsonData), &data)

    fmt.Printf("Name: %s\n", data["name"])
    fmt.Printf("Hobbies: %v\n", data["hobbies"])
}

if hobbies, ok := data["hobbies"].([]interface{}); ok {
    for _, h := range hobbies {
        fmt.Println(h)
    }
}