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我試圖通過SFTP使用JSraft從SFraft發送文件。我收到一個異常「org.apache.commons.vfs2.FileSystemException：無法連接到SFTP服務器......」。好像JSch甚至沒有試圖發送用戶名和密碼。從OpenSSH服務器端（日誌等級= DEBUG3）我看到那些：Android + JCraft JSch SFTP上傳 - 「org.apache.commons.vfs2.FileSystemException：無法連接到SFTP服務器...」
Oct 19 22:20:30 android sshd[10973]: debug3: oom_adjust_restore
Oct 19 22:20:30 android sshd[10973]: debug1: Set /proc/selfoom_score_adj to 0
Oct 19 22:20:30 android sshd[10973]: debug1: rexec start in 4 out 4 newsock 4 pipe 6 sock 7
Oct 19 22:20:30 android sshd[10973]: debug1: inetd sockets after dupping: 3, 3
Oct 19 22:20:30 android sshd[10973]: Connection from 192.168.0.165 port 45653 on 192.168.0.100 port 22
Oct 19 22:20:30 android sshd[10973]: Did not receive identification string from 192.168.0.165 port 45653
有嘗試使用scp從控制檯複製文件時沒有問題。 這裏是我使用的Java類：
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.Selectors;
import org.apache.commons.vfs2.impl.StandardFileSystemManager;
import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder;
import java.io.File;
public class SftpExample {
public static void main(String[] args) {
String hostName = "192.168.0.100";
String username = "admin";
String password = "admin";
String localFilePath = "/storage/emulated/0/file.txt";
String remoteFilePath = "file.txt";
upload(hostName, username, password, localFilePath, remoteFilePath);
exist(hostName, username, password, remoteFilePath);
download(hostName, username, password, localFilePath, remoteFilePath);
delete(hostName, username, password, remoteFilePath);
}
// Method to upload a file in Remote server
public static void upload(String hostName, String username,
String password, String localFilePath, String remoteFilePath) {
File file = new File(localFilePath);
if (!file.exists())
throw new RuntimeException("Error. Local file not found");
StandardFileSystemManager manager = new StandardFileSystemManager();
try {
manager.init();
// Create local file object
FileObject localFile = manager.resolveFile(file.getAbsolutePath());
// Create remote file object
FileObject remoteFile = manager.resolveFile(
createConnectionString(hostName, username, password,
remoteFilePath), createDefaultOptions());
// Copy local file to sftp server
remoteFile.copyFrom(localFile, Selectors.SELECT_SELF);
System.out.println("File upload success");
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
manager.close();
}
}
// Download file function:
public static void download(String hostName, String username,
String password, String localFilePath, String remoteFilePath) {
StandardFileSystemManager manager = new StandardFileSystemManager();
try {
manager.init();
String downloadFilePath = localFilePath.substring(0,
localFilePath.lastIndexOf("."))
+ "_downlaod_from_sftp"
+ localFilePath.substring(localFilePath.lastIndexOf("."),
localFilePath.length());
// Create local file object
FileObject localFile = manager.resolveFile(downloadFilePath);
// Create remote file object
FileObject remoteFile = manager.resolveFile(
createConnectionString(hostName, username, password,
remoteFilePath), createDefaultOptions());
// Copy local file to sftp server
localFile.copyFrom(remoteFile, Selectors.SELECT_SELF);
System.out.println("File download success");
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
manager.close();
}
}
// Delete file in remote system:
public static void delete(String hostName, String username,
String password, String remoteFilePath) {
StandardFileSystemManager manager = new StandardFileSystemManager();
try {
manager.init();
// Create remote object
FileObject remoteFile = manager.resolveFile(
createConnectionString(hostName, username, password,
remoteFilePath), createDefaultOptions());
if (remoteFile.exists()) {
remoteFile.delete();
System.out.println("Delete remote file success");
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
manager.close();
}
}
// Check remote file is exist function:
public static boolean exist(String hostName, String username,
String password, String remoteFilePath) {
StandardFileSystemManager manager = new StandardFileSystemManager();
try {
manager.init();
// Create remote object
FileObject remoteFile = manager.resolveFile(
createConnectionString(hostName, username, password,
remoteFilePath), createDefaultOptions());
System.out.println("File exist: " + remoteFile.exists());
return remoteFile.exists();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
manager.close();
}
}
// Establishing connection
public static String createConnectionString(String hostName,
String username, String password, String remoteFilePath) {
return "sftp://" + username + ":" + password + "@" + hostName + "/" + remoteFilePath;
}
// Method to setup default SFTP config:
public static FileSystemOptions createDefaultOptions()
throws FileSystemException {
// Create SFTP options
FileSystemOptions opts = new FileSystemOptions();
// SSH Key checking
SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
opts, "no");
// Root directory set to user home
SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
// Timeout is count by Milliseconds
SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);
return opts;
}
}
而且我這是怎麼執行SFTP上傳：
SftpExample.upload(hostName,username,password,localFilePath,remoteFilePath);
......我好不容易到Android Studio調試器連接到進程在手機上的應用程序，我發現有一些缺失的庫。所以，我補充一下：
org.apache.commons.net.ftp
org.apache.commons.httpclient
org.apache.jackrabbit.webdav.client
我編譯APK添加的每個LIB後有一個與最後一個問題：
Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.
> com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/LICENSE
File1: /home/g/StudioProjects/AndroidProject/app/build/libs/jackrabbit-webdav-2.2.5.jar
File2: /home/g/.gradle/caches/modules-2/files-2.1/org.objenesis/objenesis/2.6/639033469776fd37c08358c6b92a4761feb2af4b/objenesis-2.6.jar
任何一個知道的所有依賴庫我需要安裝運行代碼？
乾杯