一、基础json解析
package main
import (
"log"
"encoding/json"
)
/* json解析时需要结构体成员大写开头，不然就被忽略 */
type rtspUrl struct {
Url string
}
func main(){
var message string = "{
\"url\": \"rtsp://192.168.1.156:554/testStream.sdp\"}"
var mUrl rtspUrl
json.Unmarshal([]byte(message), &mUrl)
log.Println("got message:", string(message), " ", mUrl.Url)
}
结果：
[root@jn json]# go run json.go
2021/09/27 21:08:55 got message: {
"url": "rtsp://192.168.1.156:554/testStream.sdp"} rtsp://192.168.1.156:554/testStream.sdp
[root@jn json]#
二、文件读取json
readConfig.go：
package main
import (
"log"
"io/ioutil"
"encoding/json"
)
/* json解析时需要结构体成员大写开头，不然就忽略解析 ,后面的多余字符串提示 json 对应 key 值（变量不对应时有用） */
type ConfigSt struct {
Service string `json:"service"`
Version string `json:"version"`
Apps map[string]app `json:"apps"`
}
type app struct {
Name string `json:"name"`
}
/* json解析时需要结构体成员大写开头，不然就忽略解析 */
func main() {
log.Println("Config File Read with Json Format~")
data, err := ioutil.ReadFile("config.json")
if nil != err {
log.Fatalln("ReadFile ERROR:", err)
return
} else {
log.Println("ReadFile OK :\r\n", string(data))
}
var appConfig ConfigSt
err = json.Unmarshal(data, &appConfig)
if nil != err {
log.Fatalln("Unmarshal ERROR:", err)
return
} else {
log.Println("service:", appConfig.Service)
log.Println("version:", appConfig.Version)
for k, v := range appConfig.Apps {
log.Println(k, " :", v.Name)
}
}
}
config.json：
{
"service": "appManager",
"version": "v1.0.1",
"apps": {
"game0": {
"name": "ice game"
},
"game1": {
"name": "fire game"
}
}
}
运行：
[root@jn jsonFromFile]# ls
config.json readConfig.go
[root@jn jsonFromFile]# go run readConfig.go
2021/11/03 19:59:19 Config File Read with Json Format~
2021/11/03 19:59:19 ReadFile OK :
{
"service": "appManager",
"version": "v1.0.1",
"apps": {
"game0": {
"name": "ice game"
},
"game1": {
"name": "fire game"
}
}
}
2021/11/03 19:59:19 service: appManager
2021/11/03 19:59:19 version: v1.0.1
2021/11/03 19:59:19 game0 : ice game
2021/11/03 19:59:19 game1 : fire game
[root@jn jsonFromFile]#