CODEWITHSUNDEEP
javaeclipsespringfile
user4933349
user4933349

Reputation:

Multipart File to File InputStream

How can I convert a MultipartFile to FileInputStream in memory?

I have tried to below , but i am facing the error as

org.springframework.web.multipart.commons.CommonsMultipartFile cannot be cast to java.io.File

My Code is 

FileInputStream fis = new FileInputStream((File)file);

where file is a multipart file

Upvotes: 17

Views: 85257

Answers (8)

Ibrahim Hossain
Ibrahim Hossain

Reputation: 71

  String filename = file.getOriginalFilename();
  Random val = new Random();
  int randomNumber = val.nextInt(999999);
  String filePath = path + File.separator + randomNumber+filename;
  file.transferTo(Paths.get(filePath));

Note: Generate the appropriate file-sending destination path and use the Multipartfile object file.transfterTo() method. its alternative of copy() the copy method makes me at runtime error, so the best way to copy and store your image use the file.transferTo() object.

Upvotes: 0

Hemus7
Hemus7

Reputation: 79

We may just cast and use like below

FileInputStream file = (FileInputStream) multipartFile.getInputStream();

Upvotes: 0

Amir
Amir

Reputation: 1844

MultipartFile file;
InputStream inputStream = file.getInputStream();

Upvotes: 1

tutorialTpoint
tutorialTpoint

Reputation: 245

To convert Multipart file to Input Stream

MultipartFile file;
InputStream inputStream = new InputStream(file.getInputStream());

This worked for me.

Upvotes: 0

P.Saranya
P.Saranya

Reputation: 41

Try using:

MultipartFile uploadedFile = ((MultipartHttpServletRequest)request).getFile('file_name')
InputStream inputStream = new ByteArrayInputStream(uploadedFile?.getBytes())

Upvotes: 4

Akshay
Akshay

Reputation: 25

For a multipart file eg:

FileMultipartData part =  new FileMultipartData();
InputStream inputStream = part.getFileMultipart().get(0).getByteStream();

This worked for me in my code. Please try it

Upvotes: -2

PyThon
PyThon

Reputation: 1067

You can't create an instance of FileInputStream unless your file is not on file system.

You have to either first save the multipart file in temporary location on server using 

file.transferTo(tempFile);
InputStream stream = new FileInputStream(tempFile);

But multipart file can also be read simply via basic streams methods such as

InputStream inputStream =  new BufferedInputStream(file.getInputStream());

Upvotes: 35

Amey Jadiye
Amey Jadiye

Reputation: 3154

Take look at MultipartFile

In that you can go with : 

void    transferTo(File dest)

This method transfer the received file to the given destination file.

Upvotes: 1

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