java对ftp的操作，windows和linux有点区别，收集整理了一下

windows：ftp client

linux：sftp

windows：

package com.xz.upload;

import org.apache.commons.io.IOUtils;     
import org.apache.commons.net.ftp.FTPClient;     
   
import java.io.File;     
import java.io.FileInputStream;     
import java.io.IOException;     
import java.io.FileOutputStream;     

public class FtpTest {     
    public static void main(String[] args) {     
        testUpload();     
//        testDownload();     
    }     
   
    /**    
     * FTP上传单个文件测试    
     */     
    public static void testUpload() {     
        FTPClient ftpClient = new FTPClient();     
        FileInputStream fis = null;     
   
        try {     
            ftpClient.connect("ftp主机ip");     
            ftpClient.login("root", "root");     
            File srcFile = new File("F:/tempfiles/2_201083103325.png");     
            fis = new FileInputStream(srcFile);     
            //设置上传目录     
            ftpClient.changeWorkingDirectory("/u01");     
            ftpClient.setBufferSize(1024);     
            ftpClient.setControlEncoding("UTF-8");     
            //设置文件类型（二进制）     
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);     
            ftpClient.storeFile("1234.png", fis);     
            System.out.println("成功！");    
        } catch (IOException e) {     
            e.printStackTrace();     
            throw new RuntimeException("FTP客户端出错！", e);     
        } finally {     
            IOUtils.closeQuietly(fis);     
            try {     
                ftpClient.disconnect();     
            } catch (IOException e) {     
                e.printStackTrace();     
                throw new RuntimeException("关闭FTP连接发生异常！", e);     
            }     
        }     
    }     
   
    /**    
     * FTP下载单个文件测试    
     */     
    public static void testDownload() {     
        FTPClient ftpClient = new FTPClient();     
        FileOutputStream fos = null;     
   
        try {     
            ftpClient.connect("192.168.14.117");     
            ftpClient.login("admin", "123");     
   
            String remoteFileName = "/admin/pic/3.gif";     
            fos = new FileOutputStream("e:/xx/down.gif");     
   
            ftpClient.setBufferSize(1024);     
            //设置文件类型（二进制）     
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);     
            ftpClient.retrieveFile(remoteFileName, fos);     
        } catch (IOException e) {     
            e.printStackTrace();     
            throw new RuntimeException("FTP客户端出错！", e);     
        } finally {     
            IOUtils.closeQuietly(fos);     
            try {     
                ftpClient.disconnect();     
            } catch (IOException e) {     
                e.printStackTrace();     
                throw new RuntimeException("关闭FTP连接发生异常！", e);     
            }     
        }     
    }    
}   

linux：从别处转的连接：http://www.xfok.net/2009/10/124485.html

package com.xz.upload;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Properties;
import java.util.Vector;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;

/**
* @author YangHua
* 转载请注明出处：http://www.xfok.net/2009/10/124485.html
*/
public class MySFTP {

/**
* 连接sftp服务器
* @param host 主机
* @param port 端口
* @param username 用户名
* @param password 密码
* @return
*/
public ChannelSftp connect(String host, int port, String username,
String password) {
ChannelSftp sftp = null;
try {
JSch jsch = new JSch();
jsch.getSession(username, host, port);
Session sshSession = jsch.getSession(username, host, port);
System.out.println("Session created.");
sshSession.setPassword(password);
Properties sshConfig = new Properties();
sshConfig.put("StrictHostKeyChecking", "no");
sshSession.setConfig(sshConfig);
sshSession.connect();
System.out.println("Session connected.");
System.out.println("Opening Channel.");
Channel channel = sshSession.openChannel("sftp");
channel.connect();
sftp = (ChannelSftp) channel;
System.out.println("Connected to " + host + ".");
} catch (Exception e) {

}
return sftp;
}

/**
* 上传文件
* @param directory 上传的目录
* @param uploadFile 要上传的文件
* @param sftp
*/
public void upload(String directory, String uploadFile, ChannelSftp sftp) {
try {
sftp.cd(directory);
File file=new File(uploadFile);
sftp.put(new FileInputStream(file), file.getName());
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 下载文件
* @param directory 下载目录
* @param downloadFile 下载的文件
* @param saveFile 存在本地的路径
* @param sftp
*/
public void download(String directory, String downloadFile,String saveFile, ChannelSftp sftp) {
try {
sftp.cd(directory);
File file=new File(saveFile);
sftp.get(downloadFile, new FileOutputStream(file));
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 删除文件
* @param directory 要删除文件所在目录
* @param deleteFile 要删除的文件
* @param sftp
*/
public void delete(String directory, String deleteFile, ChannelSftp sftp) {
try {
sftp.cd(directory);
sftp.rm(deleteFile);
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 列出目录下的文件
* @param directory 要列出的目录
* @param sftp
* @return
* @throws SftpException
*/
public Vector listFiles(String directory, ChannelSftp sftp) throws SftpException{
return sftp.ls(directory);
}

public static void main(String[] args) {
MySFTP sf = new MySFTP(); 
String host = "linux主机ip";
int port = 22;
String username = "root";
String password = "root";
String directory = "/u01";
String uploadFile = "F:/tempfiles/2_201083103325.png";
String downloadFile = "123.png";
String saveFile = "F:/tempfiles/2_201083103325_download.png";
String deleteFile = "delete.txt";
ChannelSftp sftp=sf.connect(host, port, username, password);
sf.upload(directory, uploadFile, sftp);
//sf.download(directory, downloadFile, saveFile, sftp);
//sf.delete(directory, deleteFile, sftp);
try{
sftp.cd(directory);
sftp.mkdir("ss");
System.out.println("finished");
}catch(Exception e){
e.printStackTrace();
} 
} 
}

ps:附用到的两个jar： 下载地址： http://download.csdn.net/detail/he20101020/6704647

windows：commons-net-3.2.jar

linux：com.jcraft.jsch_0.1.31.jar