json数据转换成结构体

Posted 2020-11-23 技术社区

package main

import (
	"encoding/json"
	"fmt"
)

type IT1 struct {
	Company string `json:"company"`
	Subjects []string `json:"subjects"`
	IsOk bool  	`json:"isok"`
	Price float64 `json:"price"`
}

type IT2 struct {
	Company string `json:"company"`

}

func main(){
	jsonbuff :=`{
	"company": "zhczGO",
	"isok": true,
	"price": 99,
	"subjects": [
		"go",
		"fabric",
		"python",
		"Test"
	]
}`

var temp IT1
err :=json.Unmarshal([]byte(jsonbuff),&temp)
if err != nil{
	fmt.Println("err=",err)
	return
}
//fmt.Println("temp=",temp)
fmt.Printf("tmp=%+v
",temp)

var temp2 IT2
err = json.Unmarshal([]byte(jsonbuff),&temp2)
if err != nil{
	fmt.Println("err=",err)
	return
}
fmt.Printf("tmp2=%+v
",temp2)

}

　　

package main

import (
	"encoding/json"
	"fmt"
)

func main()  {
	jsonbuff :=`{
	"company": "zhczGO",
	"isok": true,
	"price": 99,
	"subjects": [
		"go",
		"fabric",
		"python",
		"Test"
	]
}`

  //创建一个map
  m := make(map[string]interface{},4)
  err := json.Unmarshal([]byte(jsonbuff),&m) //一定要是地址

  if err != nil{
     fmt.Println("err=",err)
     return
  }
  fmt.Printf("m=%+v/n",m)

  //var str string
  //str = m["company"]//err 无法转换

  //类型断言
	for key,value := range m  {
		switch data := value.(type) {
		case string:
			//str = data
			fmt.Printf("map[%s]的值类型为string，value=%s
",key,data)
		case bool:
			fmt.Printf("map[%s]的值类型为bool，value=%v
",key,data)
		case float64:
			fmt.Printf("map[%s]的值类型为float64，value=%f
",key,data)
		case []string:
			fmt.Printf("map[%s]的值类型为[]string，value=%v
",key,data)
		case []interface{}:
			fmt.Printf("map[%s]的值类型为interface{}，value=%v
",key,data)
		}
	}

	
}