json包的使用

Posted 2021-01-30 yvhqbat

encoding/json包

package main

import (
    "encoding/json"
    "fmt"
)

type Movie struct {
    Title  string   "name"
    Year   int      "year"
    Blue   bool     ""
    Actors []string "actor array"
}

func JsonTest() {
    m := new(Movie)
    m.Title = "tom and jerry"
    m.Year = 1992
    m.Blue = false
    m.Actors = []string{"tom", "jerry"}
    fmt.Println(m)

    // json.Marshal
    data, err := json.Marshal(m)
    if err != nil {
        fmt.Println(err.Error())
    }
    fmt.Println(data)
    fmt.Printf("%s
", data)

    // json.MarshalIndent
    data, err = json.MarshalIndent(m, "", "  ")
    if err != nil {
        fmt.Println(err.Error())
    }
    fmt.Println(data)
    fmt.Printf("%s
", data)

    // json.Unmarshal
    um := new(Movie)
    if err := json.Unmarshal(data, um); err != nil {
        fmt.Println(err.Error())
    }
    fmt.Println(um)
}

func main() {
    JsonTest()
}