post请求后台需要转成formData键值对

        let queryArr = [];
        for (let key in this.params) {
          //  if (params[key]) {
          queryArr.push(`${key}=${this.params[key]}`);
          // }
        }
          let data = `${queryArr.join("&")}`;
           console.log("data: ", data);

记录下