我想开发一个到服务器的安全FTP连接，并使用Android发送/检索文件。
我研究了很多，发现了很多不同的方法，所以我不知道这个项目需要哪些工具和库。
我正在使用Windows和Eclipse。
答案 0 :(得分：3)
您可以在Android设备上运行SFTP服务器并使用SFTP客户端; FileZilla，OpenSSH，Cerberus等 - 有数百万台SFTP服务器。
安装它，并设置身份验证（用户名和密码，证书，无论你喜欢什么）。确保SFTP端口是开放入站的 - 所有这些包都允许您定义要使用的端口。
对于Android，只需安装一个SFTP客户端，如Lysesoft的 AndFTP ，然后弹出服务器的地址和身份验证凭据。
或者，如果您真的想要对文件做一些有用的事情，Android内置了FTP库 - 请参阅DroidFtp项目。
答案 1 :(得分：2)
public class SFTPClient {
Context context;
private static String host = ServerUrl.FTP_HOST;
private static String username = ServerUrl.FTP_USERNAME;
private static String remoteDirectory = "/home/ubuntu/";
public static File photo_file;
/**
* http://kodehelp.com/java-program-for-uploading-file-to-sftp-server/
*
* @param server
* @param userName
* @param openSSHPrivateKey
* @param remoteDir
* @param localDir
* @param localFileName
* @throws IOException
*/
public static void sftpUploadFile_keyAuthentication_jsch(final Context con,
final File f) throws IOException {
photo_file = f;
new AsyncTask<Void, Void, Void>() {
private File createFileFromInputStream(InputStream inputStream,
String fileName) {
File keyFile = null;
try {
keyFile = new File(con.getCacheDir() + "/" + fileName);
if (!keyFile.exists() || !keyFile.canRead()) {
OutputStream outputStream = new FileOutputStream(
keyFile);
byte buffer[] = new byte[1024];
int length = 0;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
outputStream.close();
inputStream.close();
}
} catch (IOException e) {
// Logging exception
Log.e("error", e + "");
}
return keyFile;
}
@Override
protected Void doInBackground(Void... params) {
FileInputStream fis = null;
OutputStream os = null;
try {
JSch jsch = new JSch();
AssetManager am = con.getAssets();
InputStream inputStream = am.open("splash_openssh.ppk");
File file = createFileFromInputStream(inputStream,
"splash_openssh.ppk");
if (file.exists()) {
System.out.println(file + "");
} else {
System.out.println(file + "");
}
String path = file + "";
jsch.addIdentity(path);
Session session = jsch.getSession(username, host, 22);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
System.out.println("JSch JSch Session connected.");
System.out.println("Opening Channel.");
System.gc();
ChannelSftp channelSftp = null;
channelSftp = (ChannelSftp) session.openChannel("sftp");
channelSftp.connect();
channelSftp.cd(remoteDirectory);
long currentFilelength = f.length();
fis = new FileInputStream(f);
channelSftp.put(fis, f.getName());
Log.w("Start Upload Process", "Start Upload Process");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (OutOfMemoryError e) {
e.printStackTrace();
} catch (JSchException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (os != null) {
try {
os.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return null;
};
}.execute();
}
/**
*
* http://kodehelp.com/java-program-for-downloading-file-from-sftp-server/
*
* @param server
* @param userName
* @param openSSHPrivateKey
* @param remoteDir
* @param remoteFile
* @param localDir
* @throws IOException
*/
public static File sftpDownloadFile_keyAuthentication_jsch(final Context con)
throws IOException {
new AsyncTask<Void, Void, Void>() {
private File createFileFromInputStream(InputStream inputStream,
String fileName) {
File keyFile = null;
try {
keyFile = new File(con.getCacheDir() + "/" + fileName);
if (!keyFile.exists() || !keyFile.canRead()) {
OutputStream outputStream = new FileOutputStream(
keyFile);
byte buffer[] = new byte[1024];
int length = 0;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
outputStream.close();
inputStream.close();
}
} catch (IOException e) {
// Logging exception
Log.e("error", e + "");
}
return keyFile;
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
File newFile = null;
try {
// JSch jsch = new JSch();
// String password =
// "/storage/sdcard0/Splash/splash_openssh.ppk";
// System.out.println(password);
// jsch.addIdentity(password);
JSch jsch = new JSch();
AssetManager am = con.getAssets();
InputStream inputStream;
inputStream = am.open("splash_openssh.ppk");
File file = createFileFromInputStream(inputStream,
"splash_openssh.ppk");
if (file.exists()) {
System.out.println(file + "");
} else {
System.out.println(file + "");
}
String path = file + "";
jsch.addIdentity(path);
Session session = jsch.getSession(username, host, 22);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
Channel channel = session.openChannel("sftp");
channel.setOutputStream(System.out);
channel.connect();
ChannelSftp channelSftp = (ChannelSftp) channel;
channelSftp.cd(remoteDirectory);
byte[] buffer = new byte[1024];
File mf = Environment.getExternalStorageDirectory();
BufferedInputStream bis = new BufferedInputStream(
channelSftp.get("269-twitter.jpg"));
newFile = new File(
Environment.getExternalStorageDirectory()
+ "/Splash/upload/", "splash_img1.jpg");
OutputStream os = null;
os = new FileOutputStream(newFile);
BufferedOutputStream bos = new BufferedOutputStream(os);
int readCount;
while ((readCount = bis.read(buffer)) > 0) {
System.out.println("Writing: ");
bos.write(buffer, 0, readCount);
}
bos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (OutOfMemoryError e) {
e.printStackTrace();
} catch (JSchException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
}
return null;
};
}.execute();
return null;
}
private static String FileSaveInLocalSDCard(File file) {
// TODO Auto-generated method stub
String imagePath = "";
File mf = Environment.getExternalStorageDirectory();
String storePath = mf.getAbsoluteFile() + "/Splash/upload/";
File dirFile = new File(storePath);
dirFile.mkdirs();
File destfile = new File(dirFile, file.getName());
imagePath = storePath + file.getName();
try {
boolean copyFileValue = copyFile(file, destfile);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return imagePath;
}
public static Boolean copyFile(File sourceFile, File destFile)
throws IOException {
if (!destFile.exists()) {
destFile.createNewFile();
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
destination.transferFrom(source, 0, source.size());
} finally {
if (source != null)
source.close();
if (destination != null)
destination.close();
}
return true;
}
return false;
}
}
答案 2 :(得分：1)
Connect SFTP :
try {
JSch ssh = new JSch();
session = ssh.getSession("hostusername", "host(ip or host name)", 22);
session.setPassword("password");
session.setConfig(config);
session.connect();
conStatus = session.isConnected();
Log.e("Session", "is" + conStatus);
channel = session.openChannel("sftp");
channel.connect();
ChannelSftp sftp = (ChannelSftp) channel;
sftp.get("sshfile.txt", Environment.getExternalStorageDirectory().getPath() + "/sshfile.txt");
} catch (JSchException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.i("Session", "is" + e);
} catch (SftpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("Session", "is" + e);
} /*catch (IOException e) {
e.printStackTrace();
}*/