json - 从字节数组创建结构

Question

我使用 json.Marshal接口(interface)接受 map[string]interface{} 并将其转换为 []byte(这是字节数组吗？)

data, _ := json.Marshal(value)
log.Printf("%s\n", data)

我得到了这个输出

{"email_address":"joe@me.com","street_address":"123 Anywhere Anytown","name":"joe","output":"Hello World","status":1}

底层字节属于下面声明的结构

type Person struct {
    Name           string  `json:"name"`
    StreetAddress  string  `json:"street_address"`
    Output         string  `json:"output"`
    Status         float64 `json:"status"`
    EmailAddress   string  `json:"email_address",omitempty"`
}

我想获取数据并生成一个类型为Person struct的变量

我该怎么做？

Answer 1

你使用json.Unmarshal:

package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name          string  `json:"name"`
    StreetAddress string  `json:"street_address"`
    Output        string  `json:"output"`
    Status        float64 `json:"status"`
    EmailAddress  string  `json:"email_address",omitempty"`
}

func main() {
    data := []byte(`{"email_address":"joe@me.com","street_address":"123 Anywhere Anytown","name":"joe","output":"Hello World","status":1}`)
    var p Person
    if err := json.Unmarshal(data, &p); err != nil {
        panic(err)
    }
    fmt.Printf("%#v\n", p)
}

输出:

main.Person{Name:"joe", StreetAddress:"123 Anywhere Anytown", Output:"Hello World", Status:1, EmailAddress:"joe@me.com"}