Go：Json转结构体

解决实际需求，案例分享。

1. 请求Zabbix API，通过itemid获取到AppName（应用集名称）

   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)
   }

   响应结果：

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

2. 将响应结果（json）转结构体，方便取值

   在原来代码的基础上，继续编码。

   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)
   }

   结果：

   TEST

3. 来自最好的总结

   人生苦短，建议你还是用python吧！

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