��单的FTP客户�?sun.net.ftp.FtpClient(转自完美世界博客)

依茗 — Fri, 12 Jan 2007 03:25:00 GMT

某些数据交换�Q�我们需要通过ftp来完成�?/p>

sun.net.ftp.FtpClient 可以帮助我们�q�行一些简单的ftp客户端功能：下蝲、上传文件�?/p>

但如遇到创徏目录之类的就无能为力了，我们只好利用�W�三�Ҏ��码，比如 com.enterprisedt.net.ftp.FTPClient

下面写一些sun.net.ftp.FtpClient 的��用方法�?/p>

1、引入包

import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import sun.net.*;
import sun.net.ftp.FtpClient;

2、我们徏一个叫做FtpUtil的class

   /**
    * connectServer
    * �q�接ftp服务�?
    * @throws java.io.IOException
    * @param path 文�g夹，�I�Z��表根目录
    * @param password 密码
    * @param user   登陆用户
    * @param server 服务器地址
    */
  public void connectServer(String server, String user, String password,  String path)
  throws IOException
  {
     // server�Q�FTP服务器的IP地址�Q�user:��d��FTP服务器的用户�?
     // password�Q�登录FTP服务器的用户名的口��o�Q�path�Q�FTP服务器上的�\�?
     ftpClient = new FtpClient();
     ftpClient.openServer(server);
     ftpClient.login(user, password);
     //path是ftp服务下主目录的子目录
     if (path.length() != 0)  ftpClient.cd(path);
     //�?�q�制上传、下�?
     ftpClient.binary();
}

/**
    * upload
    * 上传文�g
    * @throws java.lang.Exception
    * @return -1 文�g不存�?
    *          -2 文�g内容为空
    *          >0 成功上传�Q�返回文件的大小
    * @param newname 上传后的新文件名
    * @param filename 上传的文�?
    */
public long upload(String filename,String newname) throws Exception
{
     long result = 0;
     TelnetOutputStream os = null;
     FileInputStream is = null;
     try {
         java.io.File file_in = new java.io.File(filename);
         if (!file_in.exists()) return -1;
         if (file_in.length()==0) return -2;
         os = ftpClient.put(newname);
         result = file_in.length();
         is = new FileInputStream(file_in);
         byte[] bytes = new byte[1024];
         int c;
         while ((c = is.read(bytes)) != -1) {
              os.write(bytes, 0, c);
         }
     } finally {
         if (is != null) {
             is.close();
         }
         if (os != null) {
            os.close();
         }
     }
    return result;
}
/**
    * upload
    * @throws java.lang.Exception
    * @return
    * @param filename
    */
public long upload(String filename)
throws Exception
{
    String newname = "";
    if (filename.indexOf("/")>-1)
    {
       newname = filename.substring(filename.lastIndexOf("/")+1);
    }else
    {
       newname = filename;
    }
    return upload(filename,newname);
}

/**
    *  download
    *  从ftp下蝲文�g到本�?
    * @throws java.lang.Exception
    * @return
    * @param newfilename 本地生成的文件名
    * @param filename 服务器上的文件名
    */
public long download(String filename,String newfilename)
throws Exception
{
    long result = 0;
    TelnetInputStream is = null;
    FileOutputStream os = null;
    try
    {
       is = ftpClient.get(filename);
       java.io.File outfile = new java.io.File(newfilename);
       os = new FileOutputStream(outfile);
       byte[] bytes = new byte[1024];
       int c;
       while ((c = is.read(bytes)) != -1) {
           os.write(bytes, 0, c);
           result = result + c;
       }
    } catch (IOException e)
    {
       e.printStackTrace();
    }
    finally {
         if (is != null) {
             is.close();
         }
         if (os != null) {
            os.close();
         }
     }
     return result;
}
/**
  * 取得某个目录下的所有文件列�?
  *
  */
public List getFileList(String path)
{
    List list = new ArrayList();
    try
    {
       DataInputStream dis = new  DataInputStream(ftpClient.nameList(path));
       String filename = "";
       while((filename=dis.readLine())!=null)
       {
         list.add(filename);
       }

    } catch (Exception e)
    {
       e.printStackTrace();
    }
    return list;
}

/**
    * closeServer
    * 断开与ftp服务器的链接
    * @throws java.io.IOException
    */
public void closeServer()
throws IOException
{
   try
   {
      if (ftpClient != null)
      {
        ftpClient.closeServer();
      }
   } catch (IOException e) {
      e.printStackTrace();
   }
}

  public static void main(String [] args) throws Exception
  {
    FtpUtil ftp = new FtpUtil();
    try {
         //�q�接ftp服务�?
         ftp.connectServer("10.163.7.15", "cxl", "1", "info2");
         /**  上传文�g刊W�info2 文�g夹下 */
         System.out.println("filesize:"+ftp.upload("f:/download/Install.exe")+"字节");
         /** 取得info2文�g夹下的所有文件列�?�q�下载到 E盘下 */
         List list = ftp.getFileList(".");
         for (int i=0;i         {
            String filename = (String)list.get(i);
            System.out.println(filename);
            ftp.download(filename,"E:/"+filename);
         }
    } catch (Exception e) {
       ///
    }finally
    {
       ftp.closeServer();
    }
  }
}

依茗 2007-01-12 11:25 发表评论

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���单的FTP客户�?sun.net.ftp.FtpClient(转自完美世界博客)

��单的FTP客户�?sun.net.ftp.FtpClient(转自完美世界博客)