Golang如何开发基础的JSON序列化与反序列化_Golang JSON序列化反序列化项目实战

type User struct {
    ID   int    `json:"id"`
    Name string `json:"name"`
    Age  int    `json:"age"`
    Email string `json:"email,omitempty"`
}

user := User{
    ID:    1,
    Name:  "Alice",
    Age:   25,
    Email: "",
}

data, err := json.Marshal(user)
if err != nil {
    log.Fatal(err)
}
fmt.Println(string(data)) // 输出：{"id":1,"name":"Alice","age":25}

jsonData := `{"id":2,"name":"Bob","age":30,"email":"bob@example.com"}`
var user2 User
err := json.Unmarshal([]byte(jsonData), &user2)
if err != nil {
    log.Fatal(err)
}
fmt.Printf("%+v\n", user2) 
// 输出：{ID:2 Name:Bob Age:30 Email:bob@example.com}

var data map[string]interface{}
json.Unmarshal([]byte(jsonData), &data)
fmt.Println(data["name"]) // 输出 Bob

type Address struct {
    City  string `json:"city"`
    State string `json:"state"`
}

type UserWithAddr struct {
    ID       int      `json:"id"`
    Name     string   `json:"name"`
    Hobbies  []string `json:"hobbies"`
    Address  Address  `json:"address"`
}

{
  "id": 3,
  "name": "Charlie",
  "hobbies": ["reading", "coding"],
  "address": {
    "city": "Beijing",
    "state": "CN"
  }
}