How to get an already existing file (on my computer) in my method and convert it to InputStream?

Question

I've a generated file in D:/EXPORT_BASE/Export_report. What I need to do is use the filePath string to fetch this file from my local, and then convert this to InputStream.

String filePath = D:/EXPORT_BASE/Export_report/1557834965979_report.txt

I need to use the String to get the file and write it to InputStream.

Before to post questions, you should try to look for the answer at least in Google, this only needs to know a little bit from java.io. https://docs.oracle.com/javase/8/docs/api/java/io/package-summary.html — Daniel Campos Olivares, May 14 '19 at 12:40
A *little* bit of research would have pointed you at the answer, e.g. [FileInputStream](https://docs.oracle.com/javase/7/docs/api/java/io/FileInputStream.html) — stridecolossus, May 14 '19 at 12:41

score 0 · Answer 1 · answered May 14 '19 at 12:39

0

Basically, like this:

public InputStream getInputStreamFromFilepath(String filepath) throws FileNotFoundException {
    File fileToOpen = new File(filepath);
    return new FileInputStream(fileToOpen);
}

answered May 14 '19 at 12:39

Daniel Campos Olivares

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score 0 · Answer 2 · answered May 14 '19 at 12:41

        File file = new File("C:/myTest.txt");
        FileInputStream fis = null;

        try {
            fis = new FileInputStream(file);

            System.out.println("Total file size to read (in bytes) : "
                    + fis.available());

            int content;
            while ((content = fis.read()) != -1) {
                // convert to char and display it
                System.out.print((char) content);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (fis != null)
                    fis.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }

How to get an already existing file (on my computer) in my method and convert it to InputStream?

2 Answers2