import java.io.BufferedReader;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;

 import sun.net.TelnetOutputStream;
 import sun.net.TelnetInputStream;
 import sun.net.ftp.FtpClient;

 public class download {
 String localfilename;

 String remotefilename;

 FtpClient ftpClient;

 // server：服务器名字
 // user：用户名
 // password：密码
 // path：服务器上的路径
 public void connectServer(String ip, int port,String user
                 , String password,String path) {

 try {
 ftpClient = new FtpClient();
 ftpClient.openServer(ip,port);
 ftpClient.login(user, password);
 System.out.println("login success!");
 if (path.length() != 0) ftpClient.cd(path);
 ftpClient.binary();
 } catch (IOException ex) {
 System.out.println("not login");
 System.out.println(ex);
 }
 }

 public void closeConnect() {
 try {
 ftpClient.closeServer();
 System.out.println("disconnect success");
 } catch (IOException ex) {
 System.out.println("not disconnect");
 System.out.println(ex);
 }
 }

 public void upload() {

 //    本地要长传文件名
 this.localfilename = "D://test2//test.txt";
 // 在ftp服务器上，要生成的文件名字。
 this.remotefilename = "test.txt";

 try {
 TelnetOutputStream os = ftpClient.put(this.remotefilename);
 java.io.File file_in = new java.io.File(this.localfilename);
 FileInputStream is = new FileInputStream(file_in);
 byte[] bytes = new byte[1024];
 int c;
 while ((c = is.read(bytes)) != -1) {
 os.write(bytes, 0, c);
 }
 System.out.println("upload success");
 is.close();
 os.close();
 } catch (IOException ex) {
 System.out.println("not upload");
 System.out.println(ex);
 }
 }

 public void download() {

 try {
 TelnetInputStream is = ftpClient.get(this.remotefilename);
 java.io.File file_in = new java.io.File(this.localfilename);
 FileOutputStream os = new FileOutputStream(file_in);
 byte[] bytes = new byte[1024];
 int c;
 while ((c = is.read(bytes)) != -1) {
 // System.out.println((char)is.read());
 // System.out.println(file_in);
 os.write(bytes, 0, c);
 }

 System.out.println("download success");
 os.close();
 is.close();
 } catch (IOException ex) {
 System.out.println("not download");
 System.out.println(ex);
 }
 }

 public void download(String remotePath,String remoteFile,String localFile) {

 try {
 if (remotePath.length() != 0) ftpClient.cd(remotePath);
 TelnetInputStream is = ftpClient.get(remoteFile);
 java.io.File file_in = new java.io.File(localFile);
 FileOutputStream os = new FileOutputStream(file_in);
 byte[] bytes = new byte[1024];
 int c;
 while ((c = is.read(bytes)) != -1) {
 // System.out.println((char)is.read());
 // System.out.println(file_in);
 os.write(bytes, 0, c);
 }

 System.out.println("download success");
 os.close();
 is.close();
 } catch (IOException ex) {
 System.out.println("not download");
 System.out.println(ex);
 }
 }

 public void download(String remoteFile,String localFile) {
 //  remoteFile是ftp服务器上的的文件路径文件。
 //    localFile 是 从ftp服务器上下载下来的文件，放在本机上的文件(名字随意定义)。
 try {
 TelnetInputStream is = ftpClient.get(remoteFile);
 java.io.File file_in = new java.io.File(localFile);
 FileOutputStream os = new FileOutputStream(file_in);
 byte[] bytes = new byte[1024];
 int c;
 while ((c = is.read(bytes)) != -1) {
 // System.out.println((char)is.read());
 // System.out.println(file_in);
 os.write(bytes, 0, c);
 }

 System.out.println("download success");
 os.close();
 is.close();
 } catch (IOException ex) {
 System.out.println("not download");
 System.out.println(ex);
 }
 }

 public static void main(String agrs[]) {

 String filepath[] = { "/callcenter/index.jsp", "/callcenter/ip.txt",
 "/callcenter/mainframe/image/processing_bar_2.gif",
 "/callcenter/mainframe/image/logo_01.jpg" };
 String localfilepath[] = { "C:\\FTP_Test\\index.jsp",
 "C:\\FTP_Test\\ip.txt", "C:\\FTP_Test\\processing_bar_2.gif",
 "C:\\FTP_Test\\logo_01.jpg" };

 download fu = new download();
 // fu.connectServer("59.151.113.85",22, "root", "cdel4321$#@!","/root/gklwb");

 // 必须加上 "/"。
 fu.connectServer("127.0.0.1",21, "jack", "123456","/ftp_test");

 //  下载用的。
 //for(int i=0;i<filepath.length;i++){
 //fu.download(filepath[i],localfilepath[i]);
 //}

 // 上传方法。
 // fu.upload();
 // 下载方法1
 // fu.download();
 // 下载方法2。
 fu.download("/ftp_test/test.txt","D:\\test2\\test.txt");


 fu.closeConnect();

 }
 } 
 
//   附件中是：        WinFtp     Server2.0.1特别汉化版