com.discursive.jccook.net.FTPExample.java Source code

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Here is the source code for com.discursive.jccook.net.FTPExample.java

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/* 
 * ========================================================================
 * 
 * Copyright 2005 Tim O'Brien.
 *
 * Licensed 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.
 * 
 * ========================================================================
 */
package com.discursive.jccook.net;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.SocketException;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;

public class FTPExample {
    public static void main(String[] args) throws IOException {
        new FTPExample().start();
    }

    public void start() throws IOException {

        FTPClient client = new FTPClient();
        OutputStream outStream = null;

        try {
            client.connect("ftp.ibiblio.org");
            client.login("anonymous", "");

            String remoteFile = "/pub/micro/commodore/schematics/computers/c64/c64bus.gif";
            outStream = new FileOutputStream("c64bus.gif");

            client.retrieveFile(remoteFile, outStream);
        } catch (IOException ioe) {
            System.out.println("Error communicating with FTP server.");
        } finally {
            IOUtils.closeQuietly(outStream);
            try {
                client.disconnect();
            } catch (IOException e) {
                System.out.println("Problem disconnecting from FTP server");
            }
        }

        secondExample();

    }

    private void secondExample() throws SocketException, IOException {
        FTPClient client = new FTPClient();
        client.connect("ftp.ibiblio.org");
        client.login("anonymous", "");

        String remoteDir = "/pub/mirrors/apache/jakarta/ecs/binaries";

        FTPFile[] remoteFiles = client.listFiles(remoteDir);

        System.out.println("Files in " + remoteDir);

        for (int i = 0; i < remoteFiles.length; i++) {
            String name = remoteFiles[i].getName();
            long length = remoteFiles[i].getSize();
            String readableLength = FileUtils.byteCountToDisplaySize(length);

            System.out.println(name + ":\t\t" + readableLength);
        }

        client.disconnect();
    }
}