在Java中实现FTP的问题

Question

在Java中实现FTP怎么用模糊文件名进行搜索文件名。如：20090819、20090820我想搜索下载含有200908的文件。

Answer 1

用JAVA获取FTP文件列表

public class FtpClientUtil {
FtpClient ftpClient;
private String server;
private int port;
private String userName;
private String userPassword;

public FtpClientUtil(String server,int port,String userName,String userPassword)
{
this.server=server;
this.port=port;
this.userName=userName;
this.userPassword=userPassword;
}
/**

• 链接到服务器

• @return
  */
  public boolean open()
  {
  if(ftpClient!=null&&ftpClient.serverIsOpen())
  return true;
  try
  {
  ftpClient= new FtpClient();
  ftpClient.openServer(server,port);
  ftpClient.login(userName, userPassword);
  ftpClient.binary();
  return true;
  }
  catch(Exception e)
  {
  e.printStackTrace();
  ftpClient=null;
  return false;
  }
  }

  public boolean cd(String dir){
  boolean f = false;
  try {
  ftpClient.cd(dir);
  } catch (IOException e) {
  Logs.error(e.toString());
  return f;
  }
  return true;
  }

  /**

• 上传文件到FTP服务器

• @param localPathAndFileName 本地文件目录和文件名

• @param ftpFileName 上传后的文件名

• @param ftpDirectory FTP目录如:/path1/pathb2/,如果目录不存在回自动创建目录

• @throws Exception
  */
  public boolean upload(String localDirectoryAndFileName,String ftpFileName,String ftpDirectory)throws Exception {
  if(!open())
  return false;
  FileInputStream is=null;
  TelnetOutputStream os=null;
  try
  {
  char ch = ' ';
  if (ftpDirectory.length() > 0)
  ch = ftpDirectory.charAt(ftpDirectory.length() - 1);
  for (; ch == '/' || ch == '\'; ch = ftpDirectory.charAt(ftpDirectory.length() - 1))
  ftpDirectory = ftpDirectory.substring(0, ftpDirectory.length() - 1);

  int slashIndex = ftpDirectory.indexOf(47);
  int backslashIndex = ftpDirectory.indexOf(92);
  int index = slashIndex;
  String dirall = ftpDirectory;
  if (backslashIndex != -1 && (index == -1 || index > backslashIndex))
  index = backslashIndex;
  String directory = "";
  while (index != -1) {
  if (index > 0) {
  String dir = dirall.substring(0, index);
  directory = directory + "/" + dir;
  ftpClient.sendServer("XMKD " + directory + "\r\n");
  ftpClient.readServerResponse();
  }
  dirall = dirall.substring(index + 1);
  slashIndex = dirall.indexOf(47);
  backslashIndex = dirall.indexOf(92);
  index = slashIndex;
  if (backslashIndex != -1 && (index == -1 || index > backslashIndex))
  index = backslashIndex;
  }
  ftpClient.sendServer("XMKD " + ftpDirectory + "\r\n");
  ftpClient.readServerResponse();

  os = ftpClient.put(ftpDirectory + "/"

  • ftpFileName); File file_in = new File(localDirectoryAndFileName); is = new FileInputStream(file_in); byte bytes[] = new byte[1024]; int i; while ((i = is.read(bytes)) != -1) os.write(bytes, 0, i); //清理垃圾

  return true;
  }
  catch(Exception e)
  {
  e.printStackTrace();
  return false;
  }
  finally
  {
  if (is != null)
  is.close();
  if (os != null)
  os.close();
  }
  }
  /**

• 从FTP服务器上下载文件并返回下载文件长度

• @param ftpDirectoryAndFileName

• @param localDirectoryAndFileName

• @return

• @throws Exception
  */
  public long download(String ftpDirectoryAndFileName,String localDirectoryAndFileName)throws Exception
  {
  long result = 0;
  if(!open())
  return result;
  TelnetInputStream is = null;
  FileOutputStream os = null;
  try
  
  {
  is = ftpClient.get(ftpDirectoryAndFileName);
  
  java.io.File outfile = new java.io.File(localDirectoryAndFileName);
  os = new FileOutputStream(outfile);
  byte[] bytes = new byte[1024];
  int c;
  while ((c = is.read(bytes)) != -1)
  {
  os.write(bytes, 0, c);
  result = result + c;
  }
  }
  catch (Exception e)
  
  {
  throw e;
  }
  finally
  {
  if (is != null)
  is.close();
  if (os != null)
  os.close();

  }
  return result;
  }
  [color=red] /**

• 返回FTP目录下的文件列表

• @param ftpDirectory

• @return
  /
  public List getFileNameList(String ftpDirectory)
  { [/color]
  List list = new ArrayList();
  if(!open())
  return list;
  try
  
  {
  DataInputStream dis = new DataInputStream(ftpClient.nameList(ftpDirectory));
  String filename = "";
  while((filename=dis.readLine())!=null)
  
  {
  list.add(filename);
  
  }
  
  } catch (Exception e)
  
  {
  e.printStackTrace();
  }
  return list;
  }
  /*

  • 删除FTP上的文件
  • @param ftpDirAndFileName / public boolean deleteFile(String ftpDirAndFileName) { if(!open()) return false; ftpClient.sendServer("DELE "+ftpDirAndFileName+"\r\n"); return true; } /*
  • 删除FTP目录
  • @param ftpDirectory / public boolean deleteDirectory(String ftpDirectory) { if(!open()) return false; ftpClient.sendServer("XRMD "+ftpDirectory+"\r\n"); return true; } /*
  • 关闭链接 */ public void close() { try { if(ftpClient!=null&&ftpClient.serverIsOpen()) ftpClient.closeServer(); }catch(Exception e) {

  }
  }
  }