post传参数 传json格式参数

以下：

const dataObject = JSON.stringify({

                                        "base64str": data.data,

                                        "reportId": reportId,

                                        "userId": userId

                                        });

$.post({

                          url: 'http://192.168.81.157:5000/api/imageApp/v0/CaptureImage',

                          contentType: 'application/json',

                          data:dataObject,

                          success:function(json){

                            console.log(json)

                          },

                          error:function(){

                              console.log("出错了")

                          }

                        });