关于go:GoJson转结构体

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解决理论需要，案例分享。

申请 Zabbix API，通过 itemid 获取到 AppName（利用集名称）

package main

import (
 "encoding/json"
 "fmt"
 "io/ioutil"
 "log"
 "net/http"
 "strings"
)

func PostRequest(payload string, url string) {
 method := "POST"
 pl := strings.NewReader(payload)
 client := &http.Client{}
 req, err := http.NewRequest(method, url, pl)

 if err != nil {fmt.Println(err)
     return
 }
 req.Header.Add("Content-Type", "application/json")

 res, err := client.Do(req)
 if err != nil {fmt.Println(err)
     return
 }
 defer res.Body.Close()

 body, err := ioutil.ReadAll(res.Body)

 if err != nil {log.Println(err)
     return
 }
 fmt.Println(string(body))
}

func main() {
 const api = "http://192.168.11.11:28080/api_jsonrpc.php"
 const token = "a638200c24a8bea7f78cd5cabf3d1dd5"
 const itemid = "33918"

 a := fmt.Sprintf(`{
     "jsonrpc": "2.0",
     "method": "application.get",
     "params": {"itemids": "%s"},
     "auth": "%s","id": 2
     }`, itemid, token)

 PostRequest(a, api)
}

响应后果：

{"jsonrpc":"2.0","result":[{"applicationid":"1574","hostid":"10354","name":"TEST","flags":"0","templateids":[]}],"id":2}

将响应后果（json）转构造体，不便取值

在原来代码的根底上，持续编码。

package main

import (
 "encoding/json"
 "fmt"
 "io/ioutil"
 "log"
 "net/http"
 "strings"
)

type resultInfo struct {
 Applicationid string   `json:"applicationid"`
 Hostid        string   `json:"hostid"`
 Name          string   `json:"name"`
 Flags         string   `json:"flags"`
 Templateids   []string `json:"templateids"`}

type resultArr []resultInfo

type Response struct {
 Jsonrpc string    `json:"jsonrpc"`
 Result  resultArr `json:result`
 Id      int       `json:"id"`
}

type Byte []byte

func JsonConvertStruct(body Byte) {
 var response Response
 json.Unmarshal([]byte(body), &response)
 fmt.Println(response.Result[0].Name)
}

func PostRequest(payload string, url string) {
 method := "POST"
 pl := strings.NewReader(payload)
 client := &http.Client{}
 req, err := http.NewRequest(method, url, pl)

 if err != nil {fmt.Println(err)
     return
 }
 req.Header.Add("Content-Type", "application/json")

 res, err := client.Do(req)
 if err != nil {fmt.Println(err)
     return
 }
 defer res.Body.Close()

 body, err := ioutil.ReadAll(res.Body)

 if err != nil {log.Println(err)
     return
 }
 JsonConvertStruct(body)
}

func main() {
 const api = "http://192.168.11.11:28080/api_jsonrpc.php"
 const token = "a638200c24a8bea7f78cd5cabf3d1dd5"
 const itemid = "33918"

 a := fmt.Sprintf(`{
     "jsonrpc": "2.0",
     "method": "application.get",
     "params": {"itemids": "%s"},
     "auth": "%s","id": 2
     }`, itemid, token)

 PostRequest(a, api)
}

后果：