Put ftp commands inside Java code?

Question

Hi.
I've no problems with ftp with exec(...), using an external ftp text file containing the ftp commands.
But can I pullthe ftp commands into the Java codes?
The reason is we don't want people accidentally messing around with the ftp commands

Answer 1

you can also use URLs for FTPing:
     * If the client needs to connect to the server through a proxy, this method sets the JVM FTP proxy settings.
     * @param proxyHost Host name of proxy.
     * @param proxyPort Port number of proxy host.
    public void setProxy(String proxyHost, int proxyPort) {
        if (proxyHost != null) {
            System.getProperties().put("ftpProxySet", "true");
            System.getProperties().put("ftpProxyHost", proxyHost);
            System.getProperties().put("ftpProxyPort", ""+proxyPort);
    }//setProxy()
     * Upload a file to a FTP server. A FTP URL is generated with the following syntax:
     * <code>ftp://user:password@host:port/urlpath;type=i</code>.
     * @param ftpServer FTP server address.
     * @param user Optional user name to login.
     * @param pwd Optional password for <i>user</i>.
     * @param fileName Destination file name on FTP server (with optional preceeding relative path, e.g. one/two/three.txt).
     * @param source Source file to upload.
     * @throws Exception on error.
    public void upload(String ftpServer, String user, String pwd, String fileName, File source) throws MalformedURLException,
            IOException {
        if (ftpServer != null && fileName != null && source != null) {
            StringBuffer sb = new StringBuffer("ftp://");
            if (user != null && pwd != null) {
                sb.append(user);
                sb.append(':');
                sb.append(pwd);
                sb.append('@');
            sb.append(ftpServer);
            sb.append('/');
            sb.append(fileName);
            sb.append(";type=i"); //a=ASCII mode, i=image (binary) mode, d= file directory listing
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            try {
                URL url = new URL(sb.toString());
                URLConnection urlc = url.openConnection();
                bos = new BufferedOutputStream(urlc.getOutputStream());
                bis = new BufferedInputStream(new FileInputStream(source.getName()));
                int i;
                while ((i = bis.read()) != -1) {
                    bos.write(i);
            } finally {
                if (bis != null) { try { bis.close(); } catch (IOException ioe) { /* ignore*/ } }
                if (bos != null) { try { bos.close(); } catch (IOException ioe) { /* ignore*/ } }
    }//upload()
      * Download a file from a FTP server. A FTP URL is generated with the following syntax:
     * <code>ftp://user:password@host:port/filePath;type=i</code>.
      * @param ftpServer FTP server address (with optional port ':<port>').
      * @param user Optional user name to login.
      * @param pwd Optional password for <i>user</i>.
      * @param fileName Name of file to download (with optional preceeding relative path, e.g. one/two/three.txt).
      * @param destination Destination file to save.
                      * @throws Exception on error.
     public void download(String ftpServer, String user, String pwd, String fileName, File destination) throws MalformedURLException,
            IOException {
        if (ftpServer != null && fileName != null && destination != null) {
            StringBuffer sb = new StringBuffer("ftp://");
            if (user != null && pwd != null) {
                sb.append(user);
                sb.append(':');
                sb.append(pwd);
                sb.append('@');
            sb.append(ftpServer);
            sb.append('/');
            sb.append(fileName);
            sb.append(";type=i"); //a=ASCII mode, i=image (binary) mode, d= file directory listing
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            try {
                URL url = new URL(sb.toString());
                URLConnection urlc = url.openConnection();
                bis = new BufferedInputStream(urlc.getInputStream());
                bos = new BufferedOutputStream(new FileOutputStream(destination.getName()));
                int i;
                while ((i = bis.read()) != -1) {
                    bos.write(i);
            } finally {
                if (bis != null) { try { bis.close(); } catch (IOException ioe) { /* ignore*/ } }
                if (bos != null) { try { bos.close(); } catch (IOException ioe) { /* ignore*/ } }
    }//download()