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!

Thats not a relative path. That's an absolute path. – bmargulies Oct 07 '11 at 20:02 — bmargulies, Oct 07 '11 at 20:02

score 93 · Accepted Answer · answered Oct 07 '11 at 20:01

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.

score 91 · Answer 2 · answered Jul 30 '16 at 17:37

91

InputStream inputStream = Files.newInputStream(Path);

answered Jul 30 '16 at 17:37

Shakirov Ramil

1,381
9
13

flawless answer! – Gaurav Jul 14 '20 at 11:42
2

Consider using buffered version for better efficiency: [link](https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/file/Files.html#newBufferedReader(java.nio.file.Path)) – SilverFox Oct 02 '20 at 09:48

score 4 · Answer 3 · edited Oct 18 '18 at 15:24

4

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.

edited Oct 18 '18 at 15:24

Ahmed Ashour

5,179
10
35
56

answered Sep 03 '14 at 04:57

Christian Ceballos

86
1
1

The existing answers already covers the question in a more simple way. – Dolda2000 Sep 03 '14 at 05:18

score 4 · Answer 4 · answered Jul 13 '22 at 09:14

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.

score 2 · Answer 5 · answered Oct 07 '11 at 20:02

2

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

answered Oct 07 '11 at 20:02

michael667

3,241
24
32

InputStream from relative path

5 Answers5

Linked