java实现sftp文件上传到linux服务器

最近写的一个JAVA实现SFTP的实例：

/*
* Created on 2009-9-14
* Copyright 2009 by www.xfok.net. All Rights Reserved
*
*/

package net.xfok.ftp;

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 = "192.168.0.1";
int port = 22;
String username = "root";
String password = "root";
String directory = "/home/httpd/test/";
String uploadFile = "D:\\tmp\\upload.txt";
String downloadFile = "upload.txt";
String saveFile = "D:\\tmp\\download.txt";
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();
}
}
}

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下面是我自己写的代码，与上面的例子无关

public String save() throws Exception {
if (Struts2Utils.getRequest().getContentLength() > 4200000) {
/* 文件超过约定值 */
Struts2Utils.getResponse().getWriter().print("1");
return null;
} else {
String directory = "项目在服务器上的目录";
UploadtempAction sf = new UploadtempAction();
ChannelSftp sftp = sf.connect(host, port, username, password);
upload = new File(uploadC.replaceAll("\\\\", "\\\\\\\\"));
DateFormat format1 = new SimpleDateFormat("yyyyMMdd");
String date = format1.format(new Date());
String imageFileName = new Date().getTime() + ".jpg";
String dts = date.substring(0, 6);
String directory2 = directory + dts + "/" + date;
try {
sftp.cd(directory2);
if (!directory2.isEmpty())
try {
  sftp.put(new FileInputStream(upload), imageFileName);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
} catch (SftpException sException) {
if (sftp.SSH_FX_NO_SUCH_FILE == sException.id) {
try {
System.out.println(directory);
sftp.cd(directory);
System.out.println(dts);
sftp.mkdir(dts);
sftp.cd(directory + dts);
sftp.mkdir(date);
sftp.cd(directory + dts + "/" + date);
sftp.put(new FileInputStream(upload), imageFileName);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
} finally {
shimage.setPath("http://" + host + "/kaimageserver/" + dts
+ "/" + date + "/" + imageFileName);
shimage.setLevelcode(levelcode);
shimage.setShid(shid);
shimage.setIdesc(idesc);
shimage.setOldname(imageFileName);
shimageService.save(shimage);
}
JSONObject jsonData = new JSONObject();
jsonData.put("success", "true");
Struts2Utils.renderHtml(jsonData.toString());
}
return NONE;
}