easypoi导入excel Current request is not a multipart request

If you're getting the "Current request is not a multipart request" error when using EasyPoi to import Excel files, it means that the request being sent to the server is not a multipart/form-data request, which is required for file uploads.

To fix this issue, you need to ensure that your front-end code is correctly sending the file as a multipart/form-data request. Here's an updated version of the front-end code that shows how to properly send a multipart request:

const fileInput = document.getElementById('excelFile');

fileInput.addEventListener('change', (event) => {
  const file = event.target.files[0];
  const formData = new FormData();
  formData.append('file', file);

  fetch('/upload', {
    method: 'POST',
    body: formData,
    headers: {
      'Content-Type': 'multipart/form-data' // Set the Content-Type header to multipart/form-data
    }
  })
  .then(response => response.json())
  .then(data => {
    // Handle the response from the back-end
    console.log(data);
  })
  .catch(error => {
    // Handle any errors
    console.error(error);
  });
});

Make sure to set the `Content-Type` header to `multipart/form-data` when making the POST request.

On the back-end, the code should remain the same as mentioned in the previous response. The `@RequestParam` annotation in the controller method will automatically bind the uploaded Excel file to the `MultipartFile` parameter.

By updating your front-end code to send a proper multipart request, you should be able to resolve the "Current request is not a multipart request" error. Let me know if you have any further questions!