go操作json,注意json的嵌套、数组

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":"测试ava","name":"Bluek404"}]}`
//json str 转map
var dat map[string]interface{}
if err := json.Unmarshal([]byte(jsonStr), &dat); err == nil {
 fmt.Println("==============json str 转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 转struct
var config ConfigStruct
if err := json.Unmarshal([]byte(jsonStr), &config); err == nil {
 fmt.Println("================json str 转struct==")
 fmt.Println(config)
 fmt.Println(config.Host)
}
//json str 转struct(部份字段)
var part Other
if err := json.Unmarshal([]byte(jsonStr), &part); err == nil {
 fmt.Println("================json str 转struct==")
 fmt.Println(part)
 fmt.Println(part.SerTcpSocketPort)
}
//struct 到json str
if b, err := json.Marshal(config); err == nil {
 fmt.Println("================struct 到json str==")
 fmt.Println(string(b))
}
//map 到json str
fmt.Println("================map 到json str=====================")
enc := json.NewEncoder(os.Stdout)
enc.Encode(dat)
//array 到 json str
arr := []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 []string
var wo []string
if err := json.Unmarshal(lang, &wo); err == nil {
 fmt.Println("================json 到 []string==")
 fmt.Println(wo)
}

}

本文来自:开源中国博客

感谢作者:max佩恩

查看原文:go操作json,注意json的嵌套、数组

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