Converting File to MultiPartFile with spring

Question

I want to convert File to multipartfile with spring. I have make this:

File in;
MultipartFile file =  null;
in = new File("C:...file on disk");
int size = (int) in.length();
DiskFileItem fileItem = new DiskFileItem("file", "application/vnd.ms-excel", false, nomefile, size ,in.getAbsoluteFile());
file = new CommonsMultipartFile(fileItem);

but receive this exception:

threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
    at org.apache.commons.fileupload.disk.DiskFileItem.getSize(DiskFileItem.java:316)

i think that fileItem is null but on debug mode is populated, there is another solution? I have this post Converting File to MultiPartFile but not work and not have solution.

Possible duplicate of Converting File to MultiPartFile

Georgios
– Georgios

2017-04-20 12:05:28 +00:00
Commented Apr 20, 2017 at 12:05 — Georgios
– Georgios, Commented Apr 20, 2017 at 12:05

Anoop George · Accepted Answer · 2015-06-02 05:30:11Z

17

    File file = new File("src/test/resources/input.txt");
    FileInputStream input = new FileInputStream(file);
    MultipartFile multipartFile = new MockMultipartFile("file",
            file.getName(), "text/plain", IOUtils.toByteArray(input));

This is another way of getting multipart file from File object

answered Jun 2, 2015 at 5:30

Anoop George

7206 silver badges7 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Paul Cuddihy Over a year ago

I'd like to point out that MockMultipartFile is in org.springframework.mock.web. And, this works nicely.

Vipul Jain Over a year ago

it only works in case of test environment only, otherwise it gives error

wheeleruniverse Over a year ago

I saw the same issue Vipul did. Errors when trying to use in real business logic.

despot · Accepted Answer · 2013-12-13 17:05:54Z

7

    File file = new File("src/test/resources/validation.txt");
    DiskFileItem fileItem = new DiskFileItem("file", "text/plain", false, file.getName(), (int) file.length() , file.getParentFile());
    fileItem.getOutputStream();
    MultipartFile multipartFile = new CommonsMultipartFile(fileItem);

You need the

    fileItem.getOutputStream();

because it will throw NPE otherwise.

answered Dec 13, 2013 at 17:05

despot

7,3879 gold badges48 silver badges64 bronze badges

Collectives™ on Stack Overflow

Converting File to MultiPartFile with spring

2 Answers 2

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related