Ganymed SSH-2 for Java系列8之SFTPv3Client说明:
SFTPv3Client是SSH for java的一个SFTP(协议版本 3), 客户端通过SSH-2连接的一个简单的同步实现java类。
其基本的对外方法有如下:
public SFTPv3FileAttributes stat(String path) throws IOException;
--》检索文件的文件属性。
返回SFTPv3FileAttributes对象,此对象之前的一篇文章有提到,主要是记录目录 、权限等信息;
public SFTPv3FileAttributes stat(String path) throws IOException
{
return statBoth(path, Packet.SSH_FXP_STAT);
}
public SFTPv3FileAttributes lstat(String path) throws IOException
--》检索文件的文件属性。这种方法不遵循服务器上的符号链接。
public SFTPv3FileAttributes lstat(String path) throws IOException
{
return statBoth(path, Packet.SSH_FXP_LSTAT);
}
public Vector ls(String dirName) throws IOException
--》列出一个目录的内容。
这个在删除非空目录的时候有演示,其跟linux环境ls展示信息一样,不可以递归展示。
public Vector ls(String dirName) throws IOException
{
byte[] handle = openDirectory(dirName);
Vector result = scanDirectory(handle);
closeHandle(handle);
return result;
}
public void mkdir(String dirName, int posixPermissions) throws IOException
--》创建一个新的目录
第一个参数是目录路径,第二个是权限码:如0600 代表rw 具体参考linux权限知识。
public void mkdir(String dirName, int posixPermissions) throws IOException
{
int req_id = generateNextRequestID();
TypesWriter tw = new TypesWriter();
tw.writeString(dirName, charsetName);
tw.writeUINT32(AttribFlags.SSH_FILEXFER_ATTR_PERMISSIONS);
tw.writeUINT32(posixPermissions);
sendMessage(Packet.SSH_FXP_MKDIR, req_id, tw.getBytes());
expectStatusOKMessage(req_id);
}
public void rm(String fileName) throws IOException
--》删除一个文件
之前有演示;
public void rm(String fileName) throws IOException
{
int req_id = generateNextRequestID();
TypesWriter tw = new TypesWriter();
tw.writeString(fileName, charsetName);
sendMessage(Packet.SSH_FXP_REMOVE, req_id, tw.getBytes());
expectStatusOKMessage(req_id);
}
public void rmdir(String dirName) throws IOException
--》删除一个空目录
之前有演示,也实现了一个如何删除非空目录 ;
public void rmdir(String dirName) throws IOException
{
int req_id = generateNextRequestID();
TypesWriter tw = new TypesWriter();
tw.writeString(dirName, charsetName);
sendMessage(Packet.SSH_FXP_RMDIR, req_id, tw.getBytes());
expectStatusOKMessage(req_id);
}
public void mv(String oldPath, String newPath) throws IOException
--》移动一个文件或者目录
public void mv(String oldPath, String newPath) throws IOException
{
int req_id = generateNextRequestID();
TypesWriter tw = new TypesWriter();
tw.writeString(oldPath, charsetName);
tw.writeString(newPath, charsetName);
sendMessage(Packet.SSH_FXP_RENAME, req_id, tw.getBytes());
expectStatusOKMessage(req_id);
}
public SFTPv3FileHandle openFileRO(String fileName) throws IOException
--》打开一个文件 读取内容;
public SFTPv3FileHandle openFileRO(String fileName) throws IOException
{
return openFile(fileName, 0x00000001, null); // SSH_FXF_READ
}
我们继续看看:SFTPv3FileHandle
public class SFTPv3FileHandle
{
final SFTPv3Client client;
final byte[] fileHandle;
boolean isClosed = false;
/* The constructor is NOT public */
SFTPv3FileHandle(SFTPv3Client client, byte[] h)
{
this.client = client;
this.fileHandle = h;
}
/**
* Get the SFTPv3Client instance which created this handle.
*
* @return A SFTPv3Client instance.
*/
public SFTPv3Client getClient()
{
return client;
}
/**
* Check if this handle was closed with the {@link SFTPv3Client#closeFile(SFTPv3FileHandle)} method
* of the SFTPv3Client
instance which created the handle.
*
* @return if the handle is closed.
*/
public boolean isClosed()
{
return isClosed;
}
其读取的内容是以二进制表示的byte[];
public SFTPv3FileHandle openFileRW(String fileName) throws IOException
--》打开文件进行读写操作;
public SFTPv3FileHandle openFileRW(String fileName) throws IOException
{
return openFile(fileName, 0x00000003, null); // SSH_FXF_READ | SSH_FXF_WRITE
}
public SFTPv3FileHandle createFile(String fileName) throws IOException
--》创建一个文件 进行读写操作
public SFTPv3FileHandle createFile(String fileName) throws IOException
{
return createFile(fileName, null);
}
public SFTPv3FileHandle createFile(String fileName, SFTPv3FileAttributes attr) throws IOException
--》创建一个文件 打开它并进行读写操作
SFTPv3FileAttributes 权限等设置对象;
public SFTPv3FileHandle createFile(String fileName, SFTPv3FileAttributes attr) throws IOException
{
return openFile(fileName, 0x00000008 | 0x00000003, attr); // SSH_FXF_CREAT | SSH_FXF_READ | SSH_FXF_WRITE
}
public SFTPv3FileHandle createFileTruncate(String fileName) throws IOException
--》创建一个文件(如果它已经存在了即截断),打开它并进行读写操作
public SFTPv3FileHandle createFileTruncate(String fileName) throws IOException
{
return createFileTruncate(fileName, null);
}
public SFTPv3FileHandle createFileTruncate(String fileName, SFTPv3FileAttributes attr) throws IOException
--》创建一个文件(如果它已经存在了即截断),打开它并进行读追加写操作;
public SFTPv3FileHandle createFileTruncate(String fileName, SFTPv3FileAttributes attr) throws IOException
{
return openFile(fileName, 0x00000018 | 0x00000003, attr); // SSH_FXF_CREAT | SSH_FXF_TRUNC | SSH_FXF_READ | SSH_FXF_WRITE
}
使用:
传入conn参数:
Connection conn = null;
try {
conn = getOpenedConnection(host, username, password, port);
SFTPv3Client sftpClient = new SFTPv3Client(conn);最后需要关闭session连接:
sftpClient.close();
conn .close();
其余方法大家可以自己看看;