go语言post请求

/*
*发送post请求
*@param apiUrl api地址
*@param postParam post参数
*@param result map格式json数据， err error对象
*/
func doHttpPost(apiUrl string,postParam map[string]string)(result map[string]interface{}, err error){
    postValue := url.Values{};
    for key, value := range postParam{            postValue.Set(key, value)        }
    fmt.Println("" + apiUrl);
    fmt.Println("post param : " + postValue.Encode());
    //response, err := http.Post(apiUrl, "application/x-www-form-urlencoded;charset=GBK", strings.NewReader(postValue.Encode()));
    response, err := http.Post(apiUrl, "application/x-www-form-urlencoded;charset=GBK", strings.NewReader(postValue.Encode()));//这里转码有问题
    obj := make(map[string]interface{});
    if err != nil{
        return nil, err;
    }
    text, err2 := ioutil.ReadAll(response.Body) ;
    response.Body.Close();
    if err2 != nil{
        return nil, err2;
    }
    err3 :=  json.Unmarshal(text, &obj);
    return obj, err3;
}