最近在使用SFTP处理上传图片，然后再从sftp服务器下载图片，特意分离出相应的工具类；
中间约到两个坑
- [ ] 一个是首先要保证有创建目录权限；
- [ ] 另一个是创建目录只能一层层创建，不能一次创建多层目录(代码已经做了处理)；
import android.annotation.SuppressLint;
import android.util.Log;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpATTRS;
import com.jcraft.jsch.SftpException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
import java.util.Vector;
public class SFTPUtils {
private String TAG = "SFTPUtils";
private String host;
private String username;
private String password;
private int port ;
private ChannelSftp sftp = null;
private Session sshSession = null;
public SFTPUtils(String host, int port, String username, String password) {
this.host = host;
this.username = username;
this.password = password;
this.port = port;
}
/**
* connect server via sftp
*/
public ChannelSftp connect() throws Exception {
JSch jsch = new JSch();
sshSession = jsch.getSession(username, host, port);
sshSession.setPassword(password);
Properties sshConfig = new Properties();
sshConfig.put("StrictHostKeyChecking", "no");
sshSession.setConfig(sshConfig);
sshSession.connect();
Channel channel = sshSession.openChannel("sftp");
if (channel != null) {
channel.connect();
} else {
Log.e(TAG, "channel connecting failed.");
throw new Exception("channel connecting failed.");
}
sftp = (ChannelSftp) channel;
return sftp;
}
/**
* 断开服务器
*/
public void disconnect() {
if (this.sftp != null) {
if (this.sftp.isConnected()) {
this.sftp.disconnect();
Log.d(TAG, "sftp is closed already");
}
}
if (this.sshSession != null) {
if (this.sshSession.isConnected()) {
this.sshSession.disconnect();
Log.d(TAG, "sshSession is closed already");
}
}
}
/**
* 单个文件上传
*
* @param remotePath
* @param remoteFileName
* @param localPath
* @param localFileName
* @return
*/
public boolean uploadFile(String remotePath, String remoteFileName,
String localPath, String localFileName) {
FileInputStream in = null;
try {
System.out.println(remotePath);
createDir(remotePath);
File file = new File(localPath + localFileName);
in = new FileInputStream(file);
System.out.println(in);
sftp.put(in, remoteFileName);
System.out.println(sftp);
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return false;
}
/**
* 批量上传
*
* @param remotePath
* @param localPath
* @param del
* @return
*/
public boolean bacthUploadFile(String remotePath, String localPath,
boolean del) {
try {
File file = new File(localPath);
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
if (files[i].isFile()
&& files[i].getName().indexOf("bak") == -1) {
synchronized (remotePath) {
if (this.uploadFile(remotePath, files[i].getName(),
localPath, files[i].getName())
&& del) {
deleteFile(localPath + files[i].getName());
}
}
}
}
return true;
} catch (Exception e) {
e.printStackTrace();
} finally {
this.disconnect();
}
return false;
}
/**
* 批量下载文件
*
* @param remotPath 远程下载目录(以路径符号结束)
* @param localPath 本地保存目录(以路径符号结束)
* @param fileFormat 下载文件格式(以特定字符开头,为空不做检验)
* @param del 下载后是否删除sftp文件
* @return
*/
@SuppressWarnings("rawtypes")
// public boolean batchDownLoadFile(String remotPath, String localPath,
// String fileFormat, boolean del) {
// try {
// connect();
// Vector v = listFiles(remotPath);
// if (v.size() > 0) {
//
// Iterator it = v.iterator();
// while (it.hasNext()) {
// ChannelSftp.LsEntry entry = (ChannelSftp.LsEntry) it.next();
// String filename = entry.getFilename();
// SftpATTRS attrs = entry.getAttrs();
// if (!attrs.isDir()) {
// if (fileFormat != null && !"".equals(fileFormat.trim())) {
// if (filename.startsWith(fileFormat)) {
// if (this.downloadFile(remotPath, filename,
// localPath, filename)
// && del) {
// deleteSFTP(remotPath, filename);
// }
// }
// } else {
// if (this.downloadFile(remotPath, filename,
// localPath, filename)
// && del) {
// deleteSFTP(remotPath, filename);
// }
// }
// }
// }
// }
// } catch (SftpException e) {
// e.printStackTrace();
// } finally {
// this.disconnect();
// }
// return false;
// }
/**
* 单个文件下载
*
* @param remotePath
* @param remoteFileName
* @param localPath
* @param localFileName
* @return
*/
public boolean downloadFile(String remotePath, String remoteFileName,
String localPath, String localFileName) {
try {
sftp.cd(remotePath);
File file = new File(localPath + localFileName);
mkdirs(localPath + localFileName);
sftp.get(remoteFileName, new FileOutputStream(file));
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
}
return false;
}
/**
* 删除文件
*
* @param filePath
* @return
*/
public boolean deleteFile(String filePath) {
File file = new File(filePath);
if (!file.exists()) {
return false;
}
if (!file.isFile()) {
return false;
}
return file.delete();
}
public boolean createDir(String createpath) {
try {
if (isDirExist(createpath)) {
this.sftp.cd(createpath);
Log.d(TAG, createpath);
return true;
}
String pathArry[] = createpath.split("/");
StringBuffer filePath = new StringBuffer("/");
for (String path : pathArry) {
if (path.equals("")) {
continue;
}
filePath.append(path + "/");
createpath = filePath.toString();
if (isDirExist(createpath)) {
sftp.cd(createpath);
} else {
sftp.mkdir(createpath);
sftp.cd(createpath);
}
}
this.sftp.cd(createpath);
return true;
} catch (SftpException e) {
e.printStackTrace();
}
return false;
}
/**
* 判断目录是否存在
*
* @param directory
* @return
*/
@SuppressLint("DefaultLocale")
public boolean isDirExist(String directory) {
boolean isDirExistFlag = false;
try {
SftpATTRS sftpATTRS = sftp.lstat(directory);
isDirExistFlag = true;
return sftpATTRS.isDir();
} catch (Exception e) {
if (e.getMessage().toLowerCase().equals("no such file")) {
isDirExistFlag = false;
}
}
return isDirExistFlag;
}
public void deleteSFTP(String directory, String deleteFile) {
try {
sftp.cd(directory);
sftp.rm(deleteFile);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 创建目录
*
* @param path
*/
public void mkdirs(String path) {
File f = new File(path);
String fs = f.getParent();
f = new File(fs);
if (!f.exists()) {
f.mkdirs();
}
}
/**
* 列出目录文件
*
* @param directory
* @return
* @throws SftpException
*/
@SuppressWarnings("rawtypes")
public Vector listFiles(String directory) throws SftpException {
return sftp.ls(directory);
}
}