Java – Convert InputStream to File
This tutorial shows several ways to convert InputStream to File in Java.
1- Common way
The common way for converting InputStream to File is through using OutputStream.
You can’t directly create a File object from InputStream. However, you can read the InputStream and write it to a File using FileOutputStream as the following:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | public static void convertInputStreamToFileCommonWay(InputStream is) throws IOException { OutputStream outputStream = null; try { File file = new File("C:\\Users\\user\\Desktop\\test\\output.txt"); outputStream = new FileOutputStream(file); int read = 0; byte[] bytes = new byte[1024]; while ((read = is.read(bytes)) != -1) { outputStream.write(bytes, 0, read); } } finally { if(outputStream != null) { outputStream.close(); } } } |
2- java.nio (Java 8)
Using nio packages exposed by Java 8, you can write an InputStream to a File using Files.copy() utility method.
1 2 3 4 5 6 | public static void convertInputStreamToFileNio(InputStream is) throws IOException { String outputFile = "C:\\Users\\user\\Desktop\\test\\output.txt"; Files.copy(is, Paths.get(outputFile)); File file = new File(outputFile); } |
3- Apache commons library
Apart from JDK, you can use apache commons library for converting InputStream to File as the following:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | public static void convertInputStreamToFileCommonsIO(InputStream is) throws IOException { OutputStream outputStream = null; try { File file = new File("C:\\Users\\user\\Desktop\\test\\output.txt"); outputStream = new FileOutputStream(file); IOUtils.copy(is, outputStream); } finally { if(outputStream != null) { outputStream.close(); } } } |
