（三十九）golang--反序列化

反序列化：是指将json字符串反序列化成原来的数据类型。

import (
    "encoding/json"
    "fmt"
)

type monster struct {
    Name     string  `json:"name"`
    Age      int     `json:"age"`
    Birthday string  `json:"birthday"`
    Sal      float64 `json:"sal"`
    Skill    string  `json:"skill"`
}

func unmarshalStruct() {
    str := "{"name":"牛魔王","age":10,"birthday":"1994-09-18","sal":10000,"skill":"牛魔拳"}"
    var monster monster
    err := json.Unmarshal([]byte(str), &monster)
    if err != nil {
        fmt.Println("unmarshal error=", err)
    }
    fmt.Printf("反序列化后 monster=%v
", monster)
    fmt.Println(monster.Name)
}

func unmarshalMap() {
    str := "{"address":"水帘洞","age":20,"name":"孙悟空","skill":"七十二变"}"
    var a map[string]interface{}
    err := json.Unmarshal([]byte(str), &a)
    if err != nil {
        fmt.Println("unmarshal error=", err)
    }
    fmt.Printf("反序列化后 monster=%v
", a)
}

func unmarshalSlice() {
    str := "[{"address":"水帘洞","age":20,"name":"孙悟空","skill":["七十二变","如意金箍棒"]}," +
        "{"age":30,"name":"猪八戒"}]"
    var a []map[string]interface{}
    err := json.Unmarshal([]byte(str), &a)
    if err != nil {
        fmt.Println("unmarshal error=", err)
    }
    fmt.Printf("反序列化后 monster=%v
", a)
}

func main() {
    unmarshalStruct()
    unmarshalMap()
    unmarshalSlice()
}

 需要注意的是：在反序列化之后的数据类型要与json字符串相对应。