我需要一个纯Apache Commons VFS解决方案/代码/示例
>将本地文件上传到远程主机位置
>检查远程主机位置中是否存在文件
>将远程主机文件下载到本地文件位置
>将文件从一个远程位置移动到同一主机中的另一个
>从远程主机位置删除文件
通过SFTP呼叫.
该解决方案只能使用Apache Commons VFS api,不应该引用底层的JSCH库.
解决方法
以下SFTP实用程序提供了上传,存在,下载,移动和删除操作的示例.我在我的几个项目中使用了这个.以下代码仅使用Apache Commons VFS库的api调用.
请确保将以下JAR放在项目的构建路径中：
> commons-logging-1.1.3.jar
> commons-vfs2-2.0.jar
> hamcrest-core-1.3.jar
> jsch-0.1.50.jar
任何其他兼容版本也会做.
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; /** * The class Sftputil containing uploading,downloading,checking if file exists * and deleting functionality using Apache Commons VFS (Virtual File System) * Library * * @author Ashok * */ public class Sftputility { public static void main(String[] args) { String hostName = "PutYourHostNameHere"; String username = "PutYourUserNameForHostHere"; String password = "PutYourPasswordForHostHere"; String localFilePath = "C:\\FakePath\\FakeFile.txt"; String remoteFilePath = "/FakeRemotePath/FakeRemoteFile.txt"; String remoteTempFilePath = "/FakeRemoteTempPath/FakeRemoteTempFile.txt"; upload(hostName,username,password,localFilePath,remoteFilePath); exist(hostName,remoteFilePath); download(hostName,remoteFilePath); move(hostName,remoteFilePath,remoteTempFilePath); delete(hostName,remoteFilePath); } /** * Method to upload a file in Remote Server * * @param hostName * HostName of the server * @param username * UserName to login * @param password * Password to login * @param localFilePath * LocalFilePath. Should contain the entire local file path - * Directory and Filename with \\ as separator * @param remoteFilePath * remoteFilePath. Should contain the entire remote file path - * Directory and Filename with / as separator */ 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,remoteFilePath),createDefaultOptions()); /* * use createDefaultOptions() in place of fsOptions for all default * options - Ashok. */ // 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(); } } public static boolean move(String hostName,String remoteSrcFilePath,String remoteDestFilePath){ StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); // Create remote object FileObject remoteFile = manager.resolveFile(createConnectionString(hostName,remoteSrcFilePath),createDefaultOptions()); FileObject remoteDestFile = manager.resolveFile(createConnectionString(hostName,remoteDestFilePath),createDefaultOptions()); if (remoteFile.exists()) { remoteFile.moveto(remoteDestFile);; System.out.println("Move remote file success"); return true; } else{ System.out.println("Source file doesn't exist"); return false; } } catch (Exception e) { throw new RuntimeException(e); } finally { manager.close(); } } /** * Method to download the file from Remote Server location * * @param hostName * HostName of the server * @param username * UserName to login * @param password * Password to login * @param localFilePath * LocalFilePath. Should contain the entire local file path - * Directory and Filename with \\ as separator * @param remoteFilePath * remoteFilePath. Should contain the entire remote file path - * Directory and Filename with / as separator */ public static void download(String hostName,String remoteFilePath) { StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); // Append _downlaod_from_sftp to the given file name. //String downloadFilePath = localFilePath.substring(0,localFilePath.lastIndexOf(".")) + "_downlaod_from_sftp" + localFilePath.substring(localFilePath.lastIndexOf("."),localFilePath.length()); // Create local file object. Change location if necessary for new downloadFilePath FileObject localFile = manager.resolveFile(localFilePath); // Create remote file object FileObject remoteFile = manager.resolveFile(createConnectionString(hostName,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(); } } /** * Method to delete the specified file from the remote system * * @param hostName * HostName of the server * @param username * UserName to login * @param password * Password to login * @param localFilePath * LocalFilePath. Should contain the entire local file path - * Directory and Filename with \\ as separator * @param remoteFilePath * remoteFilePath. Should contain the entire remote file path - * Directory and Filename with / as separator */ public static void delete(String hostName,String remoteFilePath) { StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); // Create remote object FileObject remoteFile = manager.resolveFile(createConnectionString(hostName,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: /** * Method to check if the remote file exists in the specified remote * location * * @param hostName * HostName of the server * @param username * UserName to login * @param password * Password to login * @param remoteFilePath * remoteFilePath. Should contain the entire remote file path - * Directory and Filename with / as separator * @return Returns if the file exists in the specified remote location */ public static boolean exist(String hostName,createDefaultOptions()); System.out.println("File exist: " + remoteFile.exists()); return remoteFile.exists(); } catch (Exception e) { throw new RuntimeException(e); } finally { manager.close(); } } /** * Generates SFTP URL connection String * * @param hostName * HostName of the server * @param username * UserName to login * @param password * Password to login * @param remoteFilePath * remoteFilePath. Should contain the entire remote file path - * Directory and Filename with / as separator * @return concatenated SFTP URL string */ public static String createConnectionString(String hostName,String remoteFilePath) { return "sftp://" + username + ":" + password + "@" + hostName + "/" + remoteFilePath; } /** * Method to setup default SFTP config * * @return the FileSystemOptions object containing the specified * configuration options * @throws filesystemexception */ 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,false); // Timeout is count by Milliseconds SftpFileSystemConfigBuilder.getInstance().setTimeout(opts,10000); return opts; } }
