go操作json，注意json的嵌套、數組

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

package main

import (

"encoding/json""fmt""os"

)

type ConfigStruct struct {

Host              string   `json:"host"`Port              int      `json:"port"`AnalyticsFile     string   `json:"analytics_file"`StaticFileVersion int      `json:"static_file_version"`StaticDir         string   `json:"static_dir"`TemplatesDir      string   `json:"templates_dir"`SerTcpSocketHost  string   `json:"serTcpSocketHost"`SerTcpSocketPort  int      `json:"serTcpSocketPort"`Fruits            []string `json:"fruits"`

}

type Other struct {

SerTcpSocketHost string   `json:"serTcpSocketHost"`SerTcpSocketPort int      `json:"serTcpSocketPort"`Fruits           []string `json:"fruits"`

}

type Object []interface{}

func main() {

jsonStr := `{"host": "http://localhost:9090","port": 9090,"analytics_file": "","static_file_version": 1,"static_dir": "E:/Project/goTest/src/","templates_dir": "E:/Project/goTest/src/templates/","serTcpSocketHost": ":12340","serTcpSocketPort": 12340,"fruits": ["apple", "peach"]}`jsonStr = `{"accessToken":"507b5e08ee444dck887b66bd08672905","clientToken":"64e3a5415bfe405d9485f1jf2ea5c68e","selectedProfile":{"id":"selID","name":"Bluek404"},"availableProfiles":[{"id":"測試ava","name":"Bluek404"}]}`//json str 轉mapvar dat map[string]interface{}if err := json.Unmarshal([]byte(jsonStr), &dat); err == nil {    fmt.Println("==============json str 轉map=======================")    fmt.Println(dat)    mapTmp := dat["selectedProfile"].(map[string]interface {})    fmt.Println(mapTmp["id"])    /*    var dat2 map[string]interface{}    if err := json.Unmarshal([]byte(jsonStr), &dat2); err == nil {        fmt.Println( dat2["firstName"])    }    */    mapTmp2 := (dat["availableProfiles"].([]interface {}))[0].(map[string]interface {})    //mapTmp3 := mapTmp2[0].(map[string]interface {})    fmt.Println(mapTmp2["id"])}//json str 轉structvar config ConfigStructif err := json.Unmarshal([]byte(jsonStr), &config); err == nil {    fmt.Println("================json str 轉struct==")    fmt.Println(config)    fmt.Println(config.Host)}//json str 轉struct(部份欄位)var part Otherif err := json.Unmarshal([]byte(jsonStr), &part); err == nil {    fmt.Println("================json str 轉struct==")    fmt.Println(part)    fmt.Println(part.SerTcpSocketPort)}//struct 到json strif b, err := json.Marshal(config); err == nil {    fmt.Println("================struct 到json str==")    fmt.Println(string(b))}//map 到json strfmt.Println("================map 到json str=====================")enc := json.NewEncoder(os.Stdout)enc.Encode(dat)//array 到 json strarr := []string{"hello", "apple", "python", "golang", "base", "peach", "pear"}lang, err := json.Marshal(arr)if err == nil {    fmt.Println("================array 到 json str==")    fmt.Println(string(lang))}//json 到 []stringvar wo []stringif err := json.Unmarshal(lang, &wo); err == nil {    fmt.Println("================json 到 []string==")    fmt.Println(wo)}

}