InputStream from relative path

Question

I have a relative file path (for example "/res/example.xls") and I would like to get an InputStream Object of that file from that path.

I checked the JavaDoc and did not find a constructor or method to get such an InputStream from a path/

Anyone has any idea? Please let me know!

Glossa

Thats not a relative path. That's an absolute path. – Pul

Answer 1

Use FileInputStream:

InputStream is = new FileInputStream("/res/example.xls");

But never read from raw file input stream as this is terribly slow. Wrap it with buffering decorator first:

new BufferedInputStream(is);

BTW leading slash means that the path is absolute, not relative.

Sissy

Answer 2

InputStream inputStream = Files.newInputStream(Path);

Glossectomy

flawless answer! – Joyless

Consider using buffered version for better efficiency: link – Nucleus

Answer 3

Initialize a variable like: Path filePath, and then:

FileInputStream fileStream;
try {
    fileStream = new FileInputStream(filePath.toFile());
} catch (Exception e) {
    throw new RuntimeException(e);
}

Done ! Using Path you can have access to many useful methods.

Almucantar

The existing answers already covers the question in a more simple way. – Hunkydory

Answer 4

Found this to be more elegant and less typing.

import java.nio.file.Files;
import java.nio.file.Paths;

InputStream inputStream = Files.newInputStream(Paths.get("src/test/resources/sampleFile.csv"));

Note: In my case, file was very small (used for Unit Tests), but prefer to use BufferedInputStream for better efficiency.

Aileen

Answer 5

new FileInputStream("your_relative_path") will be relative to the current working directory.

Weiland