<pre><code>export const api = (data: any) =&gt; {
  const formData = new FormData();
  Object.keys(data).forEach((key) =&gt; {
    formData.append(key, data[key] ? data[key] : '');
  });
  return client.post(url, formData, { headers: { 'Content-Type': 'multipart/form-data' } });
};</code></pre>
<p>在将json转成formData之前，将null转成空字符串</p>

formData将null转成'null'

export const api = (data: any) =&gt; {
  const formData = new FormData();
  Object.keys(data).forEach((key) =&gt; {
    formData.append(key, data[key] ? data[key] : '');
  });
  return client.post(url, formData, { headers: { 'Content-Type': 'multipart/form-data' } });
};
在将json转成formData之前，将null转成空字符串