Java upload download file via FTP server _java

Using an FTP server is a good solution for applications that use files for exchanging data.

For more detailed configuration procedures for FileZilla server servers, see the FileZilla Server Installation configuration tutorial. Before a friend said, upload large files (more than hundreds of M files) to the FTP server will reproduce the problem can not be renamed, but I test upload 2G file to FileZilla server does not have the problem, friends can be assured to use the code.

Favftputil.java

Package com.favccxx.favsoft.util;
Import Java.io.File;
Import Java.io.FileInputStream;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import Java.io.InputStream;
 
Import Java.io.OutputStream;
Import org.apache.commons.net.ftp.FTPClient;
Import Org.apache.commons.net.ftp.FTPFile;
 
Import org.apache.commons.net.ftp.FTPReply; public class Favftputil {/** * upload file (available for Action/controller layer) * @param hostname FTP server address * @param Port FTP Service Service port number * @param username FTP login account * @param password FTP login password * @param pathname FTP Server save directory * @param fileName File name after uploading to FTP server * @param inputstream input file stream * @return/public static Boolean uploadfile (String hostname, int po RT, string Username, string password, string pathname, String fileName, InputStream InputStream) {Boolean flag = False
    ;
    FtpClient ftpclient = new FtpClient ();
    Ftpclient.setcontrolencoding ("UTF-8");
      try {//Connect FTP server Ftpclient.connect (hostname, port); Login ftP Server Ftpclient.login (username, password);
      Whether to successfully log on to the FTP server int replycode = Ftpclient.getreplycode (); if (!
      Ftpreply.ispositivecompletion (Replycode)) {return flag;
      } ftpclient.setfiletype (Ftpclient.binary_file_type);
      Ftpclient.makedirectory (pathname);
      Ftpclient.changeworkingdirectory (pathname);
      Ftpclient.storefile (FileName, InputStream);
      Inputstream.close ();
      Ftpclient.logout ();
    Flag = true;
    catch (Exception e) {e.printstacktrace ();
        } finally{if (ftpclient.isconnected ()) {try {ftpclient.disconnect ();
        catch (IOException e) {e.printstacktrace ();
  }} return flag; /** * Upload file (can rename file) * @param hostname FTP server address * @param port FTP Server port number * @param username FTP Login Account * @param password FTP login password * @param pathname FTP Server save directory * @param filename uploaded to the FTP server after the file name * @param origin FileName to upload file name (Absolute address) * @return/public static Boolean uploadfilefromproduction (string hostname, int port, string username, Stri
    ng password, string pathname, string filename, String originfilename) {Boolean flag = false;
      try {inputstream InputStream = new FileInputStream (new File (Originfilename));
    Flag = UploadFile (hostname, port, username, password, pathname, filename, inputstream);
    catch (Exception e) {e.printstacktrace ();
  return flag; /** * Upload file (no file renaming operation) * @param hostname FTP server address * @param port FTP Server port number * @param username FTP Login
   Account * @param password FTP login password * @param pathname FTP Server save directory * @param originfilename the name of the file to be uploaded (absolute address) * @return */public static Boolean uploadfilefromproduction (string hostname, int port, string username, string password, string
    Pathname, String originfilename) {Boolean flag = false;
      try {String fileName = new File (originfilename). GetName (); InputStream InpuTstream = new FileInputStream (new File (Originfilename));
    Flag = UploadFile (hostname, port, username, password, pathname, fileName, InputStream);
    catch (Exception e) {e.printstacktrace ();
  return flag; /** * Delete file * @param hostname FTP server address * @param port FTP Server port number * @param username FTP login Account * @pa RAM Password FTP login password * @param pathname FTP Server save directory * @param filename name of the file to be deleted * @return/public static B Oolean DeleteFile (string hostname, int port, string username, string password, string pathname, string filename) {bool
    EAN flag = false;
    FtpClient ftpclient = new FtpClient ();
      try {//Connect FTP server Ftpclient.connect (hostname, port);
      Login to FTP server Ftpclient.login (username, password);
      Verify that the FTP server is logged on successfully int replycode = Ftpclient.getreplycode (); if (!
      Ftpreply.ispositivecompletion (Replycode)) {return flag; }//Toggle FTP directory Ftpclient.changeworkingdirectory (PathnaME);
      Ftpclient.dele (filename);
      Ftpclient.logout ();
    Flag = true;
    catch (Exception e) {e.printstacktrace ();
        } finally{if (ftpclient.isconnected ()) {try {ftpclient.logout ();
  The catch (IOException e) {}}} return flag; /** * Download file * @param hostname FTP server address * @param port FTP Server port number * @param username FTP login Account * @param
   Password FTP login password * @param pathname FTP Server file directory * @param filename File name * @param localpath file path after download * @return */public static Boolean DownloadFile (string hostname, int port, string username, string password, string pathname, S
    Tring filename, String localpath) {Boolean flag = false;
    FtpClient ftpclient = new FtpClient ();
      try {//Connect FTP server Ftpclient.connect (hostname, port);
      Login to FTP server Ftpclient.login (username, password);
      Verify that the FTP server is logged on successfully int replycode = Ftpclient.getreplycode (); if (! FtpReply.ispositivecompletion (Replycode)) {return flag;
      }//Toggle FTP directory Ftpclient.changeworkingdirectory (pathname);
      ftpfile[] Ftpfiles = Ftpclient.listfiles (); for (Ftpfile file:ftpfiles) {if (Filename.equalsignorecase (File.getname ())) {File LocalFile = new file (l
          Ocalpath + "/" + file.getname ());
          OutputStream OS = new FileOutputStream (localfile);
          Ftpclient.retrievefile (File.getname (), OS);
        Os.close ();
      } ftpclient.logout ();
    Flag = true;
    catch (Exception e) {e.printstacktrace ();
        } finally{if (ftpclient.isconnected ()) {try {ftpclient.logout ();
  The catch (IOException e) {}}} return flag; }
 
}

Favftputiltest.java

Package com.favccxx.favsoft.util;
 
Import Junit.framework.TestCase;
 
public class Favftptest extends TestCase {public
   
  void Testfavftputil () {
    String hostname = "127.0.0.1";
    int port =;
    String username = "Business";
    String Password = "Business";
    String pathname = "Business/ebook"; 
    String filename = "Big.rar"; 
    String originfilename = "C:\\users\\downloads\\downloads.rar";
    Favftputil.uploadfilefromproduction (hostname, port, username, password, pathname, filename, originfilename);   String localpath = "d:/";   Favftputil.downloadfile (hostname, port, username, password, pathname, filename, localpath);
  }
 

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