react怎麼實現檔案上傳

import { Table, Button, Modal, Form, Input, Upload, Icon, notification } from 'antd';

 <Modal
          title="檔案上傳"
          visible={this.state.visible}
          onOk={this.handleOk} //點選按鈕提價表單並上傳檔案
          onCancel={this.handleCancel}
        >
          <Form layout="vertical" onSubmit={this.handleSubmit}>
            <Form.Item>
              <div  key={Math.random()}>//點選關閉在次開啟還會有上次上傳檔案的快取
                <Upload {...props}>
                  <Button type="primary">
                    <Icon type="upload" />選擇檔案
                 </Button>
                </Upload>
 
              </div>
            </Form.Item>
            <Form.Item label="檔名(可更改)">
              {getFieldDecorator('filename', {
                // initialValue:this.state.defEmail,
                rules: [
                  {
                    message: '請輸入正確的檔名',
                    // pattern: /^[0-9]+$/,
                  },
                  {
                    required: true,
                    message: '請輸入檔名',
                  },
                ],
              })(<Input />)}
            </Form.Item>
            <Form.Item label="描述(選填)">
              {getFieldDecorator('describe', {
 
                rules: [
                  {
                    message: '描述不能為空',
                  },
                  {
                    required: false,
                    message: '請輸入描述',
                  },
                ],
              })(<TextArea />)}
            </Form.Item>
            <Form.Item label="檔案型別">
              {getFieldDecorator('filetype', {
                rules: [
                  {
                    message: '檔案型別',
                  },
                  {
                    required: true,
                    message: '檔案型別',
                  },
                ],
              })(<Input disabled={true} />)}
            </Form.Item>
          </Form>
        </Modal>

  const props = {
      showUploadList: true,
      onRemove: file => {
        this.setState(state => {
          const index = state.fileList.indexOf(file);
          const newFileList = state.fileList.slice();
          newFileList.splice(index, 1);
          return {
            fileList: newFileList,
          };
        });
      },
      beforeUpload: file => {
        console.log(file)
        let { name } = file;
        var fileExtension = name.substring(name.lastIndexOf('.') + 1);//擷取檔案字尾名
        this.props.form.setFieldsValue({ 'filename': name, 'filetype': fileExtension });//選擇完檔案後把檔名和字尾名自動填入表單
        this.setState(state => ({
          fileList: [...state.fileList, file],
        }));
        return false;
      },
      fileList,
    };

handleOk = e => {//點選ok確認上傳
    const { fileList } = this.state;
    let formData = new FormData();
    fileList.forEach(file => {
      formData.append('file', file);
    });
 
    this.props.form.validateFields((err, values) => { //獲取表單值
      let { filename, filetype, describe } = values;
      formData.append('name', filename);
      formData.append('type', filetype);
      formData.append("dir", "1");
      if(describe==undefined){
        formData.append('description',"");
      }else{
        formData.append('description',describe);
      }
      
      UploadFile(formData).then(res => { //這個是請求
        if (res.status == 200 && res.data != undefined) {
          notification.success({
            message: "上傳成功",
            description: res.data,
          });
        } else {
          notification.error({
            message: "上傳失敗",
            description: res.status,
          });
        }
      })
      this.setState({
        visible: false
      });
 
    })
  };

fetch(url, { //fetch請求
        method: 'POST',
        body: formData,
    })
 
 
 
 
 
 
      axios({ //axios
        method: 'post',
        url: url,
        data: formData,
        headers:{ //可加可不加
          'Content-Type': 'multipart/form-data; boundary=---- 
           WebKitFormBoundary6jwpHyBuz5iALV7b'
        }
    })
    .then(function (response) {
        console.log(response);
    })
    .catch(function (error) {
        console.log(error);
    });

<div key={Math.random()}>
                <Upload  {...props}>
                  <Button type="primary">
                    <Icon type="upload" />選擇檔案
                 </Button>
                </Upload>
 
              </div>

 this.props.form.resetFields()//新增之前把input值清空
    this.setState({
      visible: true,
      fileList: [] //把檔案列表清空
    });