public static String readFully(InputStream is, Charset cs) throws IOException {
ByteArrayOutputStream os = new ByteArrayOutputStream();
StreamPump.doPump(is, os);
if (cs == null) cs = Charset.defaultCharset();
return new String(os.toByteArray(), cs);
}
public static String readUnicodeFile(File f) throws IOException {
ByteArrayOutputStream bais = new ByteArrayOutputStream();
FileInputStream fis = new FileInputStream(f);
StreamPump.doPump(fis, bais, false);
fis.close();
bais.close();
byte[] barr = bais.toByteArray();
String enc = "UTF-8";
if (barr.length >= 2 && (barr[0] == -1 && barr[1] == -2) || (barr[0] == -2 && barr[1] == -1))
enc = "UTF-16";
return new String(bais.toByteArray(), enc);
}