public static boolean copy(File from, File to) {
if (from == null || to == null) {
return false;
}
if (to.exists()) {
if (!to.delete()) {
return false;
}
}
if (from.exists() && from.isFile()) {
InputStream is = null;
OutputStream os = null;
try {
is = new FileInputStream(from);
os = new FileOutputStream(to);
} catch (FileNotFoundException e) {
return false;
} finally {
closeQuietly(is);
closeQuietly(os);
}
return copy(is, os);
}
return false;
}
public static boolean copy(InputStream from, OutputStream to) {
DataInputStream dis = null;
DataOutputStream dos = null;
try {
dis = new DataInputStream(from);
dos = new DataOutputStream(to);
int length = 0;
byte[] buffer = new byte[1024];
while ((length = dis.read(buffer, 0, buffer.length)) > 0) {
dos.write(buffer, 0, length);
}
return true;
} catch (IOException e) {
return false;
} finally {
closeQuietly(dis);
closeQuietly(dos);
}
}