Mega Code Archive
Copy Completely(URI input, URI output)
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import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.nio.channels.FileChannel;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
public class Main {
public static void copyCompletely(URI input, URI output)
throws IOException
{
try
{
InputStream in = null;
try
{
File f = new File(input);
if (f.exists())
in = new FileInputStream(f);
}
catch (Exception notAFile)
{}
File out = new File(output);
File dir = out.getParentFile();
dir.mkdirs();
if (in == null)
in = input.toURL().openStream();
copyCompletely(in, new FileOutputStream(out));
}
catch (IllegalArgumentException e)
{
throw new IOException("Cannot copy to " + output);
}
}
public static void copyCompletely(InputStream input, OutputStream output) throws IOException {
// if both are file streams, use channel IO
if ((output instanceof FileOutputStream) && (input instanceof FileInputStream)) {
try {
FileChannel target = ((FileOutputStream) output).getChannel();
FileChannel source = ((FileInputStream) input).getChannel();
source.transferTo(0, Integer.MAX_VALUE, target);
source.close();
target.close();
return;
} catch (Exception e) { /* failover to byte stream version */
}
}
byte[] buf = new byte[8192];
while (true) {
int length = input.read(buf);
if (length < 0)
break;
output.write(buf, 0, length);
}
try {
input.close();
} catch (IOException ignore) {
}
try {
output.close();
} catch (IOException ignore) {
}
}
}
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