(曾在天涯)的文章详细讲解了jsch中的函数以及用法

下面是一个例子：

package com.util;

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;

import com.jcraft.jsch.ChannelSftp.LsEntry;

public class Jsch4Sftp {

/**

* 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;

// sshSession.disconnect();

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) {

Jsch4Sftp sf = new Jsch4Sftp();

String host = "***";

int port = 22;

String username = "***";

String password = "***";

String directory = "/home";

String saveFile = "1.zip";

String downLoadDirectory = "D:\\";

ChannelSftp sftp = null;

Session sshSession = null;

try {

JSch jsch = new JSch();

jsch.getSession(username, host, port);

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 + ".");

//          sf.upload(directory, uploadFile, sftp);

//          sf.download(directory, downloadFile, saveFile, sftp);

//      sf.delete(directory, deleteFile, sftp);

//          sftp.cd(directory);

Vector v = sf.listFiles(directory, sftp);

for (LsEntry e : v) {

if(!e.getFilename().startsWith(".")) {

saveFile = downLoadDirectory + e.getFilename();

sf.download(directory, e.getFilename(), saveFile, sftp);

}

}

System.out.println("finished");

} catch (Exception e) {

e.printStackTrace();

} finally {

sftp.exit();

sshSession.disconnect();

}

}}