func marixExplainPHandler(w http.ResponseWriter,rr *http.Request){

　　query := rr.URL.Query()
　　id := query.Get("id")
}

func marixExplainPHandler(w http.ResponseWriter,rr *http.Request){

　　con := rr.PostFormValue("con")
　　lang := rr.PostFormValue("lang")

 }

func marixExplainPHandler(w http.ResponseWriter,request *http.Request){

　　decoder := json.NewDecoder(request.Body)

    // 用于存放参数key=value数据
    var params map[string]string

    // 解析参数 存入map
    decoder.Decode(&params)

    fmt.Printf("POST json: username=%s, password=%s\n", params["username"], params["password"])

 }