java - 使用 Apache Commons VFS-SFTP，上传到服务器

Question

我正在尝试使用 Apache Commons VFS 将文件通过 SFTP 传输到服务器上，但我不断收到以下错误:

java.lang.RuntimeException: org.apache.commons.vfs2.FileSystemException: Could not connect to SFTP server at "sftp://user:***@xxx.x.xxx.xxx/".

这里不包含远程文件路径(remoteFilePath)正常吗？在我的代码中将其包含在连接字符串中(见下文)

我的 pom 中包含以下 jar:

• commons-logging-1.1.3.jar

• commons-vfs2-2.0.jar

• hamcrest-core-1.3.jar

• jsch-0.1.50.jar

代码:

public void SftpMethod(String strMsg, String tableName){

    String host = "xxx.x.xxx.xxx";
    String user = "user";
    String pass = "password!";
    String localFilePath = "C:\\Users\\exampleDir\\Desktop\\loc.dat";
    String remoteFilePath = "/dir/home/user/export/loc.dat";
    StandardFileSystemManager manager = new StandardFileSystemManager();

    File file = new File(localFilePath);

    if (!file.exists())
        throw new RuntimeException("Error. Local file not found");

    try{
        manager.init();
        // Create local file object
        FileObject localFile = manager.resolveFile(file.getAbsolutePath());
        // Create remote file object
        FileObject remoteFile = manager.resolveFile(
                createConnectionString(host, user, pass, remoteFilePath), 
                createDefaultOptions());
        // Copy local file to SFTP server
        remoteFile.copyFrom(localFile, Selectors.SELECT_SELF);
        System.out.println("File upload success");

    }catch(IOException e){
        throw new RuntimeException(e);
    }finally{
        manager.close();
    }
}

public static String createConnectionString(String hostName, String username, String password, String remoteFilePath) {
    return "sftp://" + username + ":" + password + "@" + hostName + "/" + remoteFilePath;
}

public static FileSystemOptions createDefaultOptions() throws FileSystemException {
    // Create SFTP options
    FileSystemOptions opts = new FileSystemOptions();

    // SSH Key checking
    SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(opts, "no");

    /*
     * Using the following line will cause VFS to choose File System's Root
     * as VFS's root. If I wanted to use User's home as VFS's root then set
     * 2nd method parameter to "true"
     */
    // Root directory set to user home
    SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);

    // Timeout is count by Milliseconds
    SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);

    return opts;
}

Answer 1

没有完整的堆栈跟踪很难给出结论性的答案，但这是我最近看到的:

Caused by: org.apache.commons.vfs2.FileSystemException: Could not load private key from "/Users/<user>/.ssh/id_rsa".
    at org.apache.commons.vfs2.provider.sftp.SftpClientFactory.createConnection(SftpClientFactory.java:131)

不幸的是，我并没有尝试使用公钥/私钥。我只是打算使用用户名/密码登录。我需要一种方法让它停止尝试读取我的私钥。

根本原因是代码使用了我的 key 的默认位置，并试图读取它(即使那不是我想要的)。

因此解决方法是通过设置以下属性来覆盖默认位置:

 System.setProperty("vfs.sftp.sshdir", "/");

这完全绕过了读取 ssh key 的尝试，并成功连接。