Go语言中struct内部的反引号

type Account struct {
	// 把struct编码成json字符串时，common.Address字段的key是address
	Address common.Address `json:"address"` // Ethereum account address derived from the key
	// 把struct编码成json字符串时，URL字段的key是url
	URL     URL            `json:"url"`     // Optional resource locator within a backend
}

见

package main
import (
    "encoding/json"
    "fmt"
)
//父对象
type Human struct {
    Name   string  `json:"english_name"` //把struct编码成json字符串时，Name字段的key是english_name，而不是Name
    Age    int     `json:"-"`            //把struct编码成json字符串时，会忽略Age这个字段
    Weight float64 //`json:",string"` //编码成字符串，这个string选项只适用字符串，浮点型和整型数据
}
//子对象
type Student struct {
    Human
    Speciality string
    Hobby      []string
    Score      float64 `json:"total,omitempty"` //如果这个字段是空值，则不编码到JSON里面，否则用total为名字编码
    Secret     []byte  `json:",omitempty"`      //如果这个字段是空值，则不编码到JSON里面，否则用Secret为名字编码
    //是一个经过base64编码的字符串
}
func main() {
    json1Str := `[
    {"Name": "James", "Age": 22,"Weight":65.80}, 
    {"english_name": "Jack", "Age": 27,"Weight":78.50}, 
    {"Name": "Kite", "Age": 19,"Weight":61.40}]`
    //定义一个切片对象
    var humans []Human
    //json字符串转换成对象格式
    err1 := json.Unmarshal([]byte(json1Str), &humans)
    if err1 != nil {
        fmt.Println(err1)
    }
    fmt.Println("json字符串转换成对象格式")
    fmt.Println(humans)
    fmt.Println("对象集合转换成json字符串")
    //切片初始化3个对象
    slice1 := []Human{
        Human{Name: "James", Age: 22, Weight: 65.80},
        Human{Name: "Jack", Age: 27, Weight: 78.50},
        Human{Name: "Kite", Age: 19, Weight: 61.40}}
    //对象集合转换成json字符串
    data1, err2 := json.Marshal(slice1)
    if err2 != nil {
        fmt.Println(err2)
    }
    fmt.Println(string(data1))
    fmt.Println("=======================================================================================")
    stus := make([]Student, 0)
    jason := Student{
        Human: Human{
            Name:   "jason",
            Age:    28,
            Weight: 60.30},
        Speciality: "computer science",
        Hobby:      []string{"tennis", "swimming", "reading"},
        Score:      725.5,
        Secret:     []byte{'I', 20, 'L', 'o', 'v', 'e', 20, 'Y', 'o', 'u', '!'}}
    stus = append(stus, jason)
    fmt.Println(stus, "\n\r")
    //对象集合转换成json字符串
    data2, err3 := json.Marshal(stus[0])
    if err3 != nil {
        fmt.Println(err3)
    }
    fmt.Println(string(data2))
    fmt.Println("=======================================================================================")
    json2Str := `[
    {"english_name":"jason","Weight":60.3,"Speciality":"computer science","Hobby":["tennis","swimming","reading"],"total":725.5,"Secret":"SRRMb3ZlFFlvdSE="}]`
    //定义一个切片对象
    var stuss []Student
    //json字符串转换成对象格式
    err4 := json.Unmarshal([]byte(json2Str), &stuss)
    if err4 != nil {
        fmt.Println(err4)
    }
    fmt.Println("json字符串转换成对象格式")
    fmt.Println(stuss)}