对于axios POST请求，请求应该是这样的: 这里的关键是responseType和header字段必须在Post的第3个参数中。第二个参数是应用程序参数。

export const requestDownloadReport = (requestParams) => async dispatch => { 
  let response = null;
  try {
    response = await frontEndApi.post('createPdf', {
      requestParams: requestParams,
    },
    {
      responseType: 'arraybuffer', // important...because we need to convert it to a blob. If we don't specify this, response.data will be the raw data. It cannot be converted to blob directly.
      headers: {
          'Content-Type': 'application/json',
          'Accept': 'application/pdf'
      }
  });          
  }
  catch(err) {
    console.log('[requestDownloadReport][ERROR]', err);
    return err
  }

  return response;
}

当响应带有可下载文件时，响应头将类似于

Content-Disposition: "attachment;filename=report.xls"
Content-Type: "application/octet-stream" // or Content-type: "application/vnd.ms-excel"

您可以创建一个单独的组件，该组件将包含一个隐藏的iframe。

  import * as React from 'react';

  var MyIframe = React.createClass({

     render: function() {
         return (
           <div style={{display: 'none'}}>
               <iframe src={this.props.iframeSrc} />
           </div>
         );
     }
  });

现在，你可以将可下载文件的url作为prop传递给这个组件，所以当这个组件接收到prop时，它将重新渲染，文件将被下载。

编辑:你也可以使用js-file-download模块。链接到Github回购

const FileDownload = require('js-file-download');

Axios({
  url: 'http://localhost/downloadFile',
  method: 'GET',
  responseType: 'blob', // Important
}).then((response) => {
    FileDownload(response.data, 'report.csv');
});

        axios.get(
            '/app/export'
        ).then(response => {    
            const url = window.URL.createObjectURL(new Blob([response]));
            const link = document.createElement('a');
            link.href = url;
            const fileName = `${+ new Date()}.csv`// whatever your file name .
            link.setAttribute('download', fileName);
            document.body.appendChild(link);
            link.click();
            link.remove();// you need to remove that elelment which is created before.
})

我的答案是一个完全hack-我只是创建了一个链接，看起来像一个按钮，并添加URL到它。

<a class="el-button"
  style="color: white; background-color: #58B7FF;"
  :href="<YOUR URL ENDPOINT HERE>"
  :download="<FILE NAME NERE>">
<i class="fa fa-file-excel-o"></i>&nbsp;Excel
</a>

我使用的是优秀的VueJs，因此使用了奇怪的表意，然而，这个解决方案是框架不可知的。这个想法适用于任何基于HTML的设计。

这对我很管用。我在reactJS中实现了这个解决方案

const requestOptions = {`enter code here`
method: 'GET',
headers: { 'Content-Type': 'application/json' }
};

fetch(`${url}`, requestOptions)
.then((res) => {
    return res.blob();
})
.then((blob) => {
    const href = window.URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = href;
    link.setAttribute('download', 'config.json'); //or any other extension
    document.body.appendChild(link);
    link.click();
})
.catch((err) => {
    return Promise.reject({ Error: 'Something Went Wrong', err });
})

诀窍是在render()中创建一个不可见的锚标记，并添加一个React ref，允许在我们有axios响应时触发单击:

class Example extends Component {
    state = {
        ref: React.createRef()
    }

    exportCSV = () => {
        axios.get(
            '/app/export'
        ).then(response => {
            let blob = new Blob([response.data], {type: 'application/octet-stream'})
            let ref = this.state.ref
            ref.current.href = URL.createObjectURL(blob)
            ref.current.download = 'data.csv'
            ref.current.click()
        })
    }

    render(){
        return(
            <div>
                <a style={{display: 'none'}} href='empty' ref={this.state.ref}>ref</a>
                <button onClick={this.exportCSV}>Export CSV</button>
            </div>
        )
    }
}

以下是文档:https://reactjs.org/docs/refs-and-the-dom.html。你可以在这里找到类似的想法:https://thewebtier.com/snippets/download-files-with-axios/。