Java 使用onClick从远程服务器下载SFTP
我目前正在开发一个应用程序,它可以打印远程服务器目录中的文件列表,并可以单击指定的文件进行下载 到目前为止,这就是我所拥有的:Java 使用onClick从远程服务器下载SFTP,java,android,sftp,jsch,Java,Android,Sftp,Jsch,我目前正在开发一个应用程序,它可以打印远程服务器目录中的文件列表,并可以单击指定的文件进行下载 到目前为止,这就是我所拥有的: public class MainActivity extends Activity { private String user = "username"; private String pass = "password"; private String host = "hostname"; private int portNum =
public class MainActivity extends Activity {
private String user = "username";
private String pass = "password";
private String host = "hostname";
private int portNum = 22;
private static final String SFTPWORKINGDIR = "/path/to/file";
private String fileName;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ListView list = (ListView)findViewById(R.id.choose_sound_listView);
new AsyncTask<Void, Void, List<String>>() {
@Override
protected List<String> doInBackground(Void... params) {
try {
return executeRemoteCommand(user, pass, host, portNum);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
public void onPostExecute(List<String> soundNames){
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_expandable_list_item_1, android.R.id.text1, soundNames);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
String newFileName = (String) list.getItemAtPosition(position);
fileName = newFileName;
Downloader(fileName);
// Show Alert
Toast.makeText(getApplicationContext(),
"Downloaded " + fileName , Toast.LENGTH_LONG).show();
}
});
}
}.execute();
}
public List<String> executeRemoteCommand(String username, String password, String hostname, int port) throws Exception {
List<String> soundNames = new ArrayList<String>();
JSch jsch = new JSch();
Session session = jsch.getSession(username, hostname, port);
session.setPassword(password);
// Avoid asking for key confirmation
Properties prop = new Properties();
prop.put("StrictHostKeyChecking", "no");
session.setConfig(prop);
session.connect();
String command = "ls -la | awk '{ print $9}'";
Channel channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
((ChannelExec) channel).setErrStream(System.err);
InputStream in = channel.getInputStream();
System.out.println("Connect to session...");
channel.connect();
StringBuffer buffer = new StringBuffer();
//This is the recommended way to read the output
byte[] tmp = new byte[1024];
while (true) {
while (in.available() > 0) {
int i = in.read(tmp, 0, 1024);
if (i < 0) {
break;
}
buffer.append(new String(tmp, 0, i));
}
if (channel.isClosed()) {
System.out.println("exit-status: " + channel.getExitStatus());
break;
}
try {
Thread.sleep(1000);
} catch (Exception ee) {
}
}
channel.disconnect();
session.disconnect();
Scanner scanner = new Scanner(buffer.toString());
while (scanner.hasNextLine()){
String line = scanner.nextLine();
soundNames.add(line);
Log.i("SSH", ": " + line);
}
return soundNames;
}
public void Downloader(String fileName) {
JSch jsch = new JSch();
Session session = null;
Channel channel = null;
ChannelSftp sftpChannel = null;
try {
session = jsch.getSession(user, host, portNum);
session.setConfig("StrictHostKeyChecking", "no");
session.setPassword(pass);
session.connect();
channel = session.openChannel("sftp");
channel.connect();
sftpChannel = (ChannelSftp) channel;
sftpChannel.cd(SFTPWORKINGDIR); //cd to dir that contains file
try {
byte[] buffer = new byte[1024];
BufferedInputStream bis = new BufferedInputStream(sftpChannel.get(fileName));
File path = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOCUMENTS);
File newFile = new File(path, "/" + fileName);
Log.d("Dir" , " " + newFile);
OutputStream os = new FileOutputStream(newFile);
BufferedOutputStream bos = new BufferedOutputStream(os);
int readCount;
while( (readCount = bis.read(buffer)) > 0) {
Log.d("Downloading", " " + fileName );
bos.write(buffer, 0, readCount);
}
bis.close();
bos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Log.d( "SUCCESS ", fileName + " has been downloaded!!!!");
sftpChannel.exit();
session.disconnect();
} catch (JSchException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}
公共类MainActivity扩展活动{
私有字符串user=“username”;
私有字符串pass=“password”;
私有字符串host=“主机名”;
私有int-portNum=22;
私有静态最终字符串SFTPWORKINGDIR=“/path/to/file”;
私有字符串文件名;
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
最终ListView列表=(ListView)findViewById(R.id.choose\u sound\u ListView);
新建异步任务(){
@凌驾
受保护列表doInBackground(无效…参数){
试一试{
返回ExecuteMoteCommand(用户、传递、主机、端口号);
}捕获(例外e){
e、 printStackTrace();
}
返回null;
}
@凌驾
public void onPostExecute(列出声音名称){
ArrayAdapter=新的ArrayAdapter(MainActivity.this,android.R.layout.simple\u expandable\u list\u item\u 1,android.R.id.text1,soundNames);
list.setAdapter(适配器);
list.setOnItemClickListener(新的AdapterView.OnItemClickListener(){
@凌驾
公共链接(AdapterView arg0、视图arg1、,
整数位置,长arg3){
字符串newFileName=(字符串)list.getItemAtPosition(位置);
fileName=newFileName;
下载程序(文件名);
//显示警惕
Toast.makeText(getApplicationContext(),
“下载”+文件名,Toast.LENGTH_LONG.show();
}
});
}
}.execute();
}
公共列表ExecuteMoteCommand(字符串用户名、字符串密码、字符串主机名、int端口)引发异常{
List soundNames=new ArrayList();
JSch JSch=新的JSch();
Session Session=jsch.getSession(用户名、主机名、端口);
session.setPassword(密码);
//避免要求钥匙确认
Properties prop=新属性();
道具放置(“检查”、“否”);
session.setConfig(prop);
session.connect();
String command=“ls-la | awk'{print$9}'”;
Channel=session.openChannel(“exec”);
((ChannelExec)channel).setCommand(command);
((ChannelExec)channel.setErrStream(System.err);
InputStream in=channel.getInputStream();
System.out.println(“连接到会话…”);
channel.connect();
StringBuffer=新的StringBuffer();
//这是读取输出的推荐方法
字节[]tmp=新字节[1024];
while(true){
while(in.available()>0){
inti=in.read(tmp,0,1024);
if(i<0){
打破
}
append(新字符串(tmp,0,i));
}
if(channel.isClosed()){
System.out.println(“退出状态:+channel.getExitStatus());
打破
}
试一试{
睡眠(1000);
}捕获(异常ee){
}
}
通道断开();
session.disconnect();
Scanner Scanner=新的扫描仪(buffer.toString());
while(scanner.hasNextLine()){
字符串行=scanner.nextLine();
声音名称。添加(行);
Log.i(“SSH”,“:”+行);
}
返回音名;
}
公共无效下载程序(字符串文件名){
JSch JSch=新的JSch();
会话=空;
通道=空;
ChannelSftp sftpChannel=null;
试一试{
session=jsch.getSession(用户、主机、端口号);
session.setConfig(“StrictHostKeyChecking”、“no”);
session.setPassword(pass);
session.connect();
通道=会话.openChannel(“sftp”);
channel.connect();
sftpChannel=(ChannelSftp)信道;
sftpChannel.cd(SFTPWORKINGDIR);//cd到包含文件的目录
试一试{
字节[]缓冲区=新字节[1024];
BufferedInputStream bis=新的BufferedInputStream(sftpChannel.get(fileName));
文件路径=Environment.getExternalStoragePublicDirectory(
环境。文件目录);
File newFile=新文件(路径“/”+文件名);
Log.d(“Dir”,“newFile”);
OutputStream os=新文件OutputStream(新文件);
BufferedOutputStream bos=新的BufferedOutputStream(os);
整数读取计数;
而((readCount=bis.read(buffer))>0){
Log.d(“下载”和“+文件名);
写入(缓冲区,0,读取计数);
}
二、关闭();
bos.close();
}catch(filenotfounde异常){
e、 printStackTrace();
}捕获(IOE异常){
e、 printStackTrace();
}
Log.d(“成功”,文件名+”已下载!!!!);
sftpChannel.exit();
session.disconnect();
}捕获(JSCHEException e){
e、 printStackTrace();
}捕获(SFTPE例外){
e、 printStackTrace();
}
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.m