java实现ftp方法一_telnetoutputstream-优快云博客

本文介绍了一种使用Java实现FTP文件上传的方法。通过sun.net.ftp.FtpClient类连接到FTP服务器，并设置登录凭证及目标目录。示例代码展示了如何打开服务器连接、登录、切换目录、设置二进制传输模式并完成文件上传。

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实现ftp的功能可以有很多方法，今天在论坛上有人推荐此方法，故记下，备忘！

sun找sun.net包相关
sun.net.ftp.FtpClient
sun.net.TelnetOutputStream

示例程序：

import   java.io.*;
import   java.util.*;
import   java.net.*;
import   sun.net.ftp.FtpClient;
import   sun.net.TelnetOutputStream;

public   class   TestFTP   {

    /**   The   host   name   of   the   FTP   server.   */
    private   String   host   =   "somename";

    /**   The   user   ID   to   login   to   the   FTP   server.   */
    private   String   userID   =   "user";

    /**   The   password   to   login   to   the   FTP   server.   */
    private   String   password   =   "password";

    /**   The   directory   on   the   FTP   server   to   upload   files   to.   */
    private   String   directory   =   "filesdir";

    /**   The   name   of   the   file   you   want   to   upload.   */
    private   String   fileName   =   "somefile.doc";

    public   static   void   main(String[]   args)   {
        try   {
            FtpClient   ftpClient   =   new   FtpClient();
            ftpClient.openServer(host);   //   connect   to   FTP   server
            ftpClient.login(userID,   password);   //   login
            ftpClient.binary();   //   set   to   binary   mode   transfer
            ftpClient.cd(directory);   //   change   directory
            File   file   =   new   File(fileName);
            TelnetOutputStream   out   =   ftpClient.put(file.getName());
            FileInputStream   in   =   new   FileInputStream(file);
            int   c   =   0;
            while   ((c   =   in.read())   !=   -1   )   {
                out.write(c);
            }
            in.close();
            out.close();
            ftpClient.closeServer();
        }   catch   (Exception   exception)   {
            exception.printStackTrace();
        }
    }

}