java - 文件上传到 SFTP 失败(Apache VFS)

Question

我有一个 SFTP 问题(带有 WinSSHD 的 Windows)。我尝试用 Apache Commons VFS 在文件夹中写一个文件。在本地 SFTP 上，我的上传没有问题，但在第二个 SFTP 上，我总是收到以下错误。

FTP 看起来像这样:

我需要上传到文件夹“alis”。奇怪的是它没有用户/组和770权限。但是，使用 FileZilla 文件上传工作正常(使用相同的登录名)。

在文件夹“alis”上执行“manager.resolveFile()”(我尝试上传到此文件夹)并打印“.getType()”，我得到的信息是"file"而不是预期的“文件夹” .

有谁知道为什么 VFS 确实将文件夹识别为文件或者为什么上传不起作用？

上传文件到SFTP时出现的异常:

Exception in thread "main" java.lang.RuntimeException: org.apache.commons.vfs2.FileSystemException: Could not copy "file:///D:/Test/test.txt" to "sftp://user:***@host/.../alis/test.txt".
    at test.Test.upload(Test.java:77)
    at test.Test.main(Test.java:22)
Caused by: org.apache.commons.vfs2.FileSystemException: Could not copy "file:///D:/Test/test.txt" to "sftp://user:***@host/.../alis/test.txt".
    at org.apache.commons.vfs2.provider.AbstractFileObject.copyFrom(AbstractFileObject.java:1062)
    at test.Test.upload(Test.java:73)
    ... 1 more
Caused by: org.apache.commons.vfs2.FileSystemException: Could not create folder "sftp://user:***@host/.../alis" because it already exists and is a file.
    at org.apache.commons.vfs2.provider.AbstractFileObject.createFolder(AbstractFileObject.java:968)
    at org.apache.commons.vfs2.provider.AbstractFileObject.getOutputStream(AbstractFileObject.java:1424)
    at org.apache.commons.vfs2.provider.DefaultFileContent.getOutputStream(DefaultFileContent.java:461)
    at org.apache.commons.vfs2.provider.DefaultFileContent.getOutputStream(DefaultFileContent.java:441)
    at org.apache.commons.vfs2.FileUtil.copyContent(FileUtil.java:111)
    at org.apache.commons.vfs2.provider.AbstractFileObject.copyFrom(AbstractFileObject.java:1053)
    ... 2 more

源代码:(要运行您需要“jsch-0.1.50.jar”的示例)

import java.io.File;
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;

/**
 *
 * @author thbe
 */
public class Test {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        upload("host", "user", "password", "D:/Test/test.txt", "/../alis/test.txt");
    }

    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);
        SftpFileSystemConfigBuilder.getInstance().setPreferredAuthentications(opts, "publickey,keyboard-interactive,password");

        return opts;
    }

    public static void upload(String hostName, String username,
            String password, String localFilePath, String remoteFilePath) {

        File f = new File(localFilePath);
        if (!f.exists()) {
            throw new RuntimeException("Error. Local file not found");
        }

        StandardFileSystemManager manager = new StandardFileSystemManager();

        try {
            manager.init();

            // Create local file object
            FileObject localFile = manager.resolveFile(f.getAbsolutePath());

            System.out.println("open remote File");
            FileObject remoteFile = manager.resolveFile(
                    createConnectionString(hostName, username, password,
                    remoteFilePath), createDefaultOptions());

            System.out.println("exists:"+remoteFile.exists());
            System.out.println("type:"+remoteFile.getType());
            System.out.println("URL:"+remoteFile.getURL());

            System.out.println("copy to remote File");
            remoteFile.copyFrom(localFile, Selectors.SELECT_SELF);

            System.out.println("File upload success");
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            manager.close();
        }
    }

    public static String createConnectionString(String hostName,
            String username, String password, String remoteFilePath) {
        // result: "sftp://user:123456@domainname.com/resume.pdf
        return "sftp://" + username + ":" + password + "@" + hostName + "/"
                + remoteFilePath;
    }
}

Answer 1

我们使用了另一种方式来连接和上传文件到一些 SFTP:

public static void main(String[] args) {
    putFile("user", "host", "passwd", "/../test.txt", "C:/test.txt");
}
public static void putFile(String username, String host, String password, String remotefile,     String localfile){
    JSch jsch = new JSch();
    Session session = null;
    try {
          session = jsch.getSession(username, host, 22);
          session.setConfig("StrictHostKeyChecking", "no");
          session.setPassword(password);
          session.connect();

          Channel channel = session.openChannel("sftp");
          channel.connect();
          ChannelSftp sftpChannel = (ChannelSftp) channel;
          sftpChannel.put(localfile, remotefile);
          sftpChannel.exit();
          session.disconnect();
     } catch (JSchException e) {
          e.printStackTrace();  
     } catch (SftpException e) {
          e.printStackTrace();
     }
}

这种方法应该适用于任何 SSH (SFTP)，并且不要求任何登录信息或其他阻止内容。