If you do not want to use other library, here is a simple function to convert InputStream
to OutputStream
.
public static void copyStream(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
Now you can easily write an Inputstream
into file by using FileOutputStream
-
FileOutputStream out = new FileOutputStream(outFile);
copyStream (inputStream, out);
out.close();
If you are using Java version 7 or higher, you can use try-with-resources to properly close the FileOutputStream
. The following code use IOUtils.copy()
from commons-io.
public void copyToFile(InputStream inputStream, File file) throws IOException {
try(OutputStream outputStream = new FileOutputStream(file)) {
IOUtils.copy(inputStream, outputStream);
}
}
public static void copyInputStreamToFile(InputStream input, File file) {
try (OutputStream output = new FileOutputStream(file)) {
input.transferTo(output);
} catch (IOException ioException) {
ioException.printStackTrace();
}
}
java.io.InputStream#transferTo is available since Java 9.
Create a temp file first.
File tempFile = File.createTempFile(prefix, suffix);
tempFile.deleteOnExit();
FileOutputStream out = new FileOutputStream(tempFile);
IOUtils.copy(in, out);
return tempFile;
Since Java 7, you can do it in one line even without using any external libraries:
Files.copy(inputStream, outputPath, StandardCopyOption.REPLACE_EXISTING);
See the API docs.
In one line :
FileUtils.copyInputStreamToFile(inputStream, file);
(org.apache.commons.io)
Source: Stackoverflow.com