无法获取到 post 请求体中的参数,麻烦大佬给看看

这是我的SignIn方法代码 <pre><code> func SignIn(rw http.ResponseWriter, req *http.Request) { if req.Method != http.MethodPost { rw.WriteHeader(http.StatusBadRequest) return } req.ParseForm() fmt.Println(req.Form) fmt.Println(req.FormValue("phoneNum")) for k,v := range req.Form{ fmt.Println("key:",k) fmt.Println("val:",strings.Join(v,"")) } fmt.Fprintf(rw,"this is SignInfunc") return } </code></pre> 通过postman发送post请求 却或获取不到请求体中的参数。