FTP文件下载

public static void ftpDownFile() {
String id = ""; //FTP的ID
int port ="";  // FTP的商品
String name = "";  // 用户名
String password = ""; //密码
String directory = "";//FTP下载文件路径
String fileName = "";//下载后文件保存地址
try {
FtpClient fc = new FtpClient(id, port);
fc.login(name, password);
int ch;
File fi = new File(fileName);
RandomAccessFile getFile = new RandomAccessFile(fi, "rw");
getFile.seek(0);
TelnetInputStream fget = fc.get(directory);
DataInputStream puts = new DataInputStream(fget);
while ((ch = puts.read()) >= 0) {
getFile.write(ch);
}
fget.close();
getFile.close();
fc.closeServer();
} catch (IOException ex) {
ex.printStackTrace();
}
}