Java ftp上傳文件方法效率對比

一、功能簡介：

txt文件采用ftp方式從windows傳輸到Linux系統；

二、ftp實現方法

（1）方法一：采用二進制流傳輸，設置緩沖區，速度快，50M的txt文件需要15秒；

//FTP傳輸到數據庫服務器
public boolean uploadServerByFtp(String fileNmae){
　　boolean flag = true;
   //客戶端數據文件路徑
   String client_path = "D://answer/data/";
   //服務器上的存放數據文件路徑
   String server_path = "/home/download/file_tmp/";
   String hostname = "192.25.125.112";
   String ftpusername =  "root";
   String ftppwd = “123456”;
   int port = 21;//查找路徑下的指定txt文件，然后采用FTP上傳
   File file_name = new File(client_path+fileNmae);  
   if(!file_name.exists()){
   　　return false;
   }
   //創建ftp客戶端
   FTPClient ftpClient = new FTPClient();
   ftpClient.setControlEncoding("utf-8");
   //主動模式
   ftpClient.enterLocalActiveMode();
   String getfileName = file_name.getName();
   String getfileNamePath = file_name.getPath();
   if((getfileName.substring(getfileName.lastIndexOf(".")).trim().equals(".txt"))){
   　　try {
      　　//鏈接ftp服務器
         ftpClient.connect(hostname, port);
         //登錄ftp
         ftpClient.login(ftpusername, ftppwd);
         int reply = ftpClient.getReplyCode();
         if (!FTPReply.isPositiveCompletion(reply)) {
         　　 ftpClient.disconnect();
             logger.info("Returns a 530 password username error or the current user does not have permission to close the FTP connection");
             return false;
         }
         ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
         String server_file_name = server_path+ getfileName;

         InputStream input = new FileInputStream(getfileNamePath);
         OutputStream out = ftpClient.storeFileStream(server_file_name);
         byte[] byteArray = new byte[4096];
         int read = 0;
         while ((read = input.read(byteArray)) != -1) {
         　　out.write(byteArray, 0, read);
         }
         out.close();
         ftpClient.logout();
     } catch (SocketException e) {
         flag = false;
         e.printStackTrace();
     } catch (IOException e) {
         flag = false;
         e.printStackTrace();
     } catch (Exception e) {
         flag = false;
         e.printStackTrace();
     }finally {
     　　if (ftpClient.isConnected()) {
        　　try {
           　　ftpClient.disconnect();
           } catch (IOException ioe) {
               ioe.printStackTrace();
           }
         }
      }
   }
return flag;
}

（2）方法二：storeFile()方法，沒有設置緩沖區，速度慢，50M的txt文件需要100秒；

//FTP傳輸到數據庫服務器
public boolean uploadServerByFtp(String fileNmae){
　　boolean flag = true;
   //客戶端數據文件路徑
   String client_path = "D://answer/data/";
   //服務器上的存放數據文件路徑
   String server_path = "/home/download/file_tmp/";
   String hostname = "192.25.125.112";
   String ftpusername =  "root";
   String ftppwd = “123456”;
   int port = 21;
   //查找路徑下的指定txt文件，然后采用FTP上傳
   File file_name = new File(client_path+fileNmae);  
   if(!file_name.exists()){
   　　return false;
   }
   //創建ftp客戶端
   FTPClient ftpClient = new FTPClient();
   ftpClient.setControlEncoding("utf-8");
   String getfileName = file_name.getName();
   String getfileNamePath = file_name.getPath();
   if((getfileName.substring(getfileName.lastIndexOf(".")).trim().equals(".txt"))){
   　　try {
      　　//鏈接ftp服務器
         ftpClient.connect(hostname, port);
         //登錄ftp
         ftpClient.login(ftpusername, ftppwd);
         int reply = ftpClient.getReplyCode();
         if (!FTPReply.isPositiveCompletion(reply)) {
         　　 ftpClient.disconnect();
             logger.info("Returns a 530 password username error or the current user does not have permission to close the FTP connection");
             return false;
         }
         ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
         String server_file_name = server_path+ getfileName;

         //讀取源文件流（客戶端文件）
         InputStream client_fileInput = new FileInputStream(getfileNamePath);
         //傳送到服務端
         ftpClient.storeFile(server_file_name, client_fileInput);
         client_fileInput.close();
         ftpClient.logout();
     } catch (SocketException e) {
         flag = false;
         e.printStackTrace();
     } catch (IOException e) {
         flag = false;
         e.printStackTrace();
     } catch (Exception e) {
         flag = false;
         e.printStackTrace();
     }finally {
     　　if (ftpClient.isConnected()) {
        　　try {
           　　ftpClient.disconnect();
           } catch (IOException ioe) {
               ioe.printStackTrace();
           }
         }
      }
   }
return flag;
}