Golang实现Json转结构体的示例详解

来源：jb51　　时间：2023/2/20 15:16:34　　对本文有异议

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)
}