由 FileInputStream 怎么得到 ByteArrayOutputStream ?

Question

InputStream怎么能到OutputStream呢?

Answer 1

FileInputStream  fis = new FileInputStream(new File("test.txt"));
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[128];
        int iLength = 0;
        while((iLength = fis.read(buffer)) != -1) {
            baos.write(buffer, 0, iLength);
        }
        fis.close();
        baos.close();