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位置
- 从远程主机位置删除文件
通过 SFTP 调用。
该解决方案应仅使用 Apache Commons VFS api，不应引用底层 JSCH 库。
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1 回答
44
下面的 SFTP 实用程序给出了上传、存在、下载、移动和删除操作的示例。我已经在我的几个项目中使用了它。以下代码仅使用来自 Apache Commons VFS 库的 api 调用。
请确保将以下 JAR 放入项目的构建路径中：
- 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可以。
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, username, password, remoteFilePath);
download(hostName, username, password, localFilePath,remoteFilePath);
move(hostName, username, password, remoteFilePath, remoteTempFilePath);
delete(hostName, username, password, 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, username, password, 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 username, String password, String remoteSrcFilePath, String remoteDestFilePath){
StandardFileSystemManager manager = new StandardFileSystemManager();
try {
manager.init();
// Create remote object
FileObject remoteFile = manager.resolveFile(createConnectionString(hostName, username, password, remoteSrcFilePath), createDefaultOptions());
FileObject remoteDestFile = manager.resolveFile(createConnectionString(hostName, username, password, 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 username, String password, String localFilePath, 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, 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();
}
}
/**
* 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 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:
/**
* 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, 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();
}
}
/**
* 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 username, String password, 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;
}
}
于 2014-01-28T07:40:01.093 回答