JAVA操作 FTP 下載文件
/*
JAVA操作 FTP 下載
文件下載。
/
private void ftpDownload()
{
FTPClient ftpClient = null;
InputStream input = null;
boolean loginFlag = false;
List<String> list = new ArrayList<String>();
try
{
int defaultPort = CommonsMessage.FTP_DEFAULT_PORT; // 21
int timeout = M400Constant.NUM_SIXTY_THOUSAND * M400Constant.NUM_TWO; // 120000
ftpClient = new FTPClient();
ftpClient.setDefaultPort(defaultPort);
ftpClient.setConnectTimeout(timeout);
// ftpClient.setSoTimeout(timeout);
ftpClient.setDefaultTimeout(timeout);
ftpClient.setDataTimeout(timeout);
ftpClient.setControlEncoding("UTF-8");
FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
conf.setServerLanguageCode("en");
conf.setDefaultDateFormatStr("MMM dd HH:mm");
ftpClient.configure(conf);
ftpClient.connect(SystemConfig.getKey("scpFtpIp"));
loginFlag = ftpClient.login(SystemConfig.getKey("scpFtpUserName").trim(),
SystemConfig.getKey("scpFtpPassword").trim());
String ftpDir = SystemConfig.getKey("ftpHangupDir").trim();
if (!loginFlag)
{
DEBUGGER.debug("login scp ftp is :" + loginFlag);
}
// String ftpDir = SystemConfig.getKey("ftpHangupDir").trim();
if (ftpClient.changeWorkingDirectory(ftpDir))
{
FTPFile file[] = ftpClient.listFiles(ftpDir);
if (file != null && file.length > 0)
{
DEBUGGER.debug("hungup file size is: " + file.length);
for (int i = 0; i < file.length; i++)
{
String fileName = file[i].getName();
ftpClient.setBufferSize(CommonsMessage.ONE_K_BUFFER_SIZE);
// 設置文件類型（二進制）
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
input = ftpClient.retrieveFileStream(fileName);
processInput(ftpClient, input, list, fileName);
// if (downFlag) {
// ftpClient.deleteFile(fileName);
// }
}
}
else
{
try
{
Thread.sleep(M400Constant.NUM_FIVE_THOUSAND);
}
catch (InterruptedException e)
{
/
if (DEBUGGER.isDebugEnable()) {
DEBUGGER.debug("Failed to queryScpToQuery", e); }
/
error("Failed to queryScpToQuery", e);
}
}
}
else
{
DEBUGGER.debug("scp dir is error ");
}
}
catch (Exception e)
{
/
DEBUGGER.debug("dowonload file is faild ", e);
/
error("dowonload file is faild ", e);
}
finally
{
close(input, "close inputStream is faild ");
if (ftpClient != null)
{
try
{
deleteFile(ftpClient, list);
boolean logoutFlag = false;
try
{
logoutFlag = ftpClient.logout();
// DEBUGGER.debug("logout : " + logoutFlag);
}
catch (Exception e)
{
/
DEBUGGER.debug("logout : " + logoutFlag);
/
error("logout : " + logoutFlag, e);
}
ftpClient = null;
}
catch (Exception e)
{
/
if (DEBUGGER.isDebugEnable()) {
DEBUGGER.error("Failed to ftpDownload", e); }
/
error("Failed to ftpDownload", e);
}
// try {
// ftpClient.disconnect();
// } catch (IOException e) {
// if (DEBUGGER.isDebugEnable()) {
// DEBUGGER.debug("Failed to ftpDownload", e);
// }
// }
}
}
}
/*
處理ftp對應文件輸入流。
@param ftpClient
ftp客戶端對象
@param input
ftp文件輸入流
@param list
處理完畢的文件列表，用于執行文件刪除使用
@param fileName
當前處理的文件名稱
/
private void processInput(FTPClient ftpClient, InputStream input, List<String> list, String fileName)
{
if (input == null)
{
return;
}
// boolean downFlag = callingService(input);
callingService(input);
try
{
input.close();
ftpClient.completePendingCommand();
list.add(fileName);
}
catch (Exception e)
{
/
DEBUGGER.debug("Failed to ftpDownload", e);
*/
error("Failed to ftpDownload", e);
}
}
}</pre>