Android 服务器之SFTP服务器上传下载功能

本文主要是讲解Android服务器之SFTP服务器的上传下载功能，也是对之前所做项目的整理。

主要的代码块如下所示，对代码中相应地方稍作调整，复制粘贴到项目即可以使用，代码中会提供相应注释。

1.MainActivity

public class MainActivity extends Activity implements OnClickListener{private final  String TAG="MainActivity";private Button buttonUpLoad = null;  private Button buttonDownLoad = null;  private SFTPUtils sftp;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_sftpmain);        init();    }            public void init(){      //获取控件对象         buttonUpLoad = (Button) findViewById(R.id.button_upload);          buttonDownLoad = (Button) findViewById(R.id.button_download);          //设置控件对应相应函数          buttonUpLoad.setOnClickListener(this);          buttonDownLoad.setOnClickListener(this);        sftp = new SFTPUtils("SFTP服务器IP", "用户名","密码");    }       public void onClick(final View v) {              // TODO Auto-generated method stub         new Thread() {       @Override       public void run() {            //这里写入子线程需要做的工作                        switch (v.getId()) {                      case R.id.button_upload: {                      //上传文件                     Log.d(TAG,"上传文件");                       String localPath = "sdcard/xml/";                    String remotePath = "test";                    sftp.connect();                     Log.d(TAG,"连接成功");                     sftp.uploadFile(remotePath,"APPInfo.xml", localPath, "APPInfo.xml");                    Log.d(TAG,"上传成功");                     sftp.disconnect();                    Log.d(TAG,"断开连接");                   }                          break;                                                 case R.id.button_download: {                              //下载文件                           Log.d(TAG,"下载文件");                            String localPath = "sdcard/download/";                           String remotePath = "test";                           sftp.connect();                            Log.d(TAG,"连接成功");                            sftp.downloadFile(remotePath, "APPInfo.xml", localPath, "APPInfo.xml");                           Log.d(TAG,"下载成功");                            sftp.disconnect();                           Log.d(TAG,"断开连接");                                                     }                            break;                       default:                            break;              }              }        }.start();      };}

2.SFTPUtils

public class SFTPUtils {private String TAG="SFTPUtils";private String host;private String username;private String password;private int port = 22;private ChannelSftp sftp = null;private Session sshSession = null;public SFTPUtils (String host, String username, String password) {this.host = host;this.username = username;this.password = password;}/** * connect server via sftp */public ChannelSftp connect() {        JSch jsch = new JSch();        try {            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.");            }            sftp = (ChannelSftp) channel;        } catch (JSchException e) {            e.printStackTrace();        }        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 {createDir(remotePath);System.out.println(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()) {LsEntry entry = (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 + "/");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);}}

3.导入jsch-0.1.52.jar，这个包网上有下载。注意一定要把它放到工程的libs目录下。

4.布局文件：activity_sftpmain.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"   > <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textStyle="bold"        android:textSize="24dip"        android:layout_gravity="center"        android:text="SFTP上传下载测试 "/>     <Buttonandroid:id="@+id/button_upload"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="上传"/>        <Buttonandroid:id="@+id/button_download"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="下载"/></LinearLayout>

5.Manifest文件配置

    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>