ftp

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.SocketException;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;

/**
* ftp客户端
*
* @author Yuedong Li
*
*/
public class tools {
private FTPClient client;

public tools(String host, String userName, String password)
throws SocketException, IOException {
initFtpClient(host, 21, userName, password);
}

public tools(String host, int port, String userName, String password)
throws SocketException, IOException {
initFtpClient(host, port, userName, password);
}

/**
* 登录
*
* @param host
* @param port
* @param userName
* @param password
* @throws SocketException
* @throws IOException
*/
public void initFtpClient(String host, int port, String userName,
String password) throws SocketException, IOException {
client = new FTPClient();
client.connect(host, port);
client.login(userName, password);
}

/**
* 得到所有目录
*
* @param remotePath
* @return
* @throws IOException
*/
public FTPFile[] listFiles(String remotePath) throws IOException {
if (client == null)
return null;
client.changeWorkingDirectory(remotePath);
return client.listFiles();
}

/**
* 上传
*
* @param localPath
* 本地路径
* @param remotePath
* ftp路径
* @return 上传是否成功
* @throws IOException
*/
public boolean upload(String localPath, String remotePath)
throws IOException {
if (client == null)
return false;
boolean res = false;
FileInputStream fileInputStream = new FileInputStream(localPath);
int index = remotePath.lastIndexOf('/');
if (index != -1) {
client.setFileType(FTP.BINARY_FILE_TYPE);
client.changeWorkingDirectory(remotePath.substring(0, index));
res = client.storeFile(remotePath.substring(index + 1),
fileInputStream);
}
fileInputStream.close();
return res;
}

/**
* 下载
*
* @param remotePath
* ftp路径
* @param localPath
* 本地路径
* @return 下载是否成功
* @throws IOException
*/
public boolean download(String remotePath, String localPath)
throws IOException {
if (client == null)
return false;
boolean res = false;
FileOutputStream fileOutputStream = new FileOutputStream(localPath);
res = client.retrieveFile(remotePath, fileOutputStream);
fileOutputStream.flush();
fileOutputStream.close();
return res;

}

/**
* 删除文件
*
* @param remotePath ftp端路径
* @return
* @throws IOException
*/
public boolean delete(String remotePath) throws IOException {
if (client == null)
return false;

return client.deleteFile(remotePath) || deleteDirectory(remotePath);
}

/**
* 创建目录
*
* @param remotePath
* @throws IOException
*/
public boolean makeDirectory(String remotePath) throws IOException {
if (client == null)
return false;

String[] item = remotePath.split("/");
String currentPath = "";
for (int i = 0; i < item.length - 1; i++) {
currentPath = currentPath + "/" + item[i];
client.makeDirectory(currentPath);
}

return client.makeDirectory(remotePath);
}


/**
* 删除文件
*
* @param remotePath ftp端路径
* @return
* @throws IOException
*/
private boolean deleteDirectory(String remotePath) throws IOException {
FTPFile[] files = listFiles(remotePath);
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
deleteDirectory(remotePath + "/" + files[i].getName());
} else {
client.deleteFile(remotePath + "/" + files[i].getName());
}
}
return client.removeDirectory(remotePath);
}

/**
* 重命名
*
* @param remoteOldPath
* @param remoteNewPath
* @return
* @throws IOException
*/
public boolean rename(String remoteOldPath, String remoteNewPath)
throws IOException {
if (client == null)
return false;
return client.rename(remoteOldPath, remoteNewPath);
}

/**
* 退出登录
*
* @throws IOException
*/
public void close() throws IOException {
if (client != null)
client.logout();
}
}