Go 编码解码 Json 数据

Question

编码：

package main 

import (
	"fmt"
	"encoding/json"
)


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

func main() {
	var kevin Person 
	kevin.Name = "kevin"
	kevin.Age = 26
	kevin.Email = "twn39@163.com"

	body, err := json.Marshal(kevin)
	if err != nil {
		panic(err.Error())
	}
	fmt.Println(string(body))
}

其中 json:"name" 为 json 和结构体中字段的映射，结构体中字段首字母必须大写

解码：

package main 

import (
	"fmt"
	"encoding/json"
)


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

func main() {
	str := `{"name":"kevin","age":30,"email":"twn39@163.com"}`
	var kevin Person 

	err := json.Unmarshal([]byte(str), &kevin)
	if err != nil {
		panic(err.Error())
	}
	fmt.Println(kevin.Email)
}