How to read file stored on server using java? I have .txt file stored on server, how to read contents of it.
String test, newq;
newq = "http://www.example.com/pqr.txt";
test = new String(Files.readAllBytes(Paths.get(newq)));
// variable test should contain pqr.txt content
What I am doing wrong?
That code works fine for files found in the file system. Path object is designed specifically for this.
When you want to access a remote file, it no longer works.
One easy way to read the file is this:
URL url = new URL("https://wordpress.org/plugins/about/readme.txt");
String text = new Scanner( url.openStream() ).useDelimiter("\\A").next();
It is not very pretty but it is small, it works and does not require any library.
With Apache Commons you can do it like this:
URL url = new URL("https://wordpress.org/plugins/about/readme.txt");
String text = IOUtils.toString(url.openStream());
Go through an HttpURLConnection and use a StringBuilder. Sketch code:
final URL url = new URL("http://www.example.com/pqr.txt");
final StringBuilder sb = new StringBuilder();
final char[] buf = new char[4096];
final CharsetDecoder decoder = StandardCharsets.UTF_8.newDecoder()
.onMalformedInput(CodingErrorAction.REPORT);
try (
final InputStream in = url.openStream();
final InputStreamReader reader = new InputStreamReader(in, decoder);
) {
int nrChars;
while ((nrChars = reader.read(buf)) != -1)
sb.append(buf, 0, nrChars);
}
final String test = sb.toString();
