Android FTP Server Upload File Introduction of Code Detailed Explanation

1. Preface

During development, you will encounter the need to upload files to the FTP server. First, you must import
commons-net-3. 3. jar then uses api to do the following:

Ftp related code

import android.util.Log;

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

import java.io.FileInputStream;

public class FTPClientUtils {

 private static final String TAG = "MainActivity";
 private FTPClient ftpClient = null; // FTP Client 

 /**
 *  Connect to FTP Server 
 *
 * @param host ftp Server domain name 
 * @param username  Access user name 
 * @param password  Access password 
 * @param port  Port 
 * @return  Is the connection successful 
 */
 public boolean ftpConnect(String host, String username, String password, int port) {
 try {
  ftpClient = new FTPClient();
  ftpClient.connect(host,port);
  //  According to the returned status code, whether the link is established successfully or not is judged 
  if (FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {
  boolean status = ftpClient.login(username, password);
  /*
   *  Set file transfer mode 
   *  Avoid 1 Some possible problems, here you must set the file transfer format. 
   *  Here we use BINARY_FILE_TYPE To transfer text, images, and compressed files. 
   */
  ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
  ftpClient.enterLocalPassiveMode();
  return status;
  }
 } catch (Exception e) {
  e.printStackTrace();
 }
 return false;
 }

 /**
 *  Disconnect ftp Server connection 
 *
 * @return  Disconnect result 
 */
 public boolean ftpDisconnect() {
 //  Judge null pointer 
 if (ftpClient == null) {
  return true;
 }
 //  Disconnect ftp Server connection 
 try {
  ftpClient.logout();
  ftpClient.disconnect();
  return true;
 } catch (Exception e) {
  e.printStackTrace();
 }
 return false;
 }

 /**
 * ftp  File upload 
 *
 * @param srcFilePath  Source file directory 
 * @param desFileName  File name 
 * @return  File upload results 
 */
 public boolean ftpUpload(String srcFilePath, String desFileName) {
 boolean status = false;
 try {
  FileInputStream srcFileStream = new FileInputStream(srcFilePath);
  status = ftpClient.storeFile(desFileName, srcFileStream);
  srcFileStream.close();
  return status;
 } catch (Exception e) {
  e.printStackTrace();
 }
 return status;
 }

 /**
 * ftp  Change Directory 
 *
 * @param path  Changed path 
 * @return  Whether the change was successful 
 */
 public boolean ftpChangePath(String path) {
 boolean status = false;
 try {
  status = ftpClient.changeWorkingDirectory(path);
 } catch (Exception e) {
  e.printStackTrace();
 }
 return status;
 }
}

2. Call api

boolean isConnect = mFtpClient.ftpConnect(" Server host", " User name ", " Password ", 21);// The default port number is 21
  if (isConnect) {
  boolean isSuccessful = mFtpClient.ftpUpload("/sdcard/" + folderName + "/" + mPicturename, "/htdocs/pics/" + mPicturename);
  if (isSuccessful) {
   mFtpClient.ftpDisconnect();
  		// Upload succeeded 
  } else {
   // Upload failed 
  }
  } else {
  // Server connection failed 
  }

Appendix: I wrote FTP upload code when I was doing the project before:

package com.kandao.yunbell.videocall; 
 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.io.UnsupportedEncodingException; 
import java.net.SocketException; 
 
import org.apache.commons.net.ftp.FTP; 
import org.apache.commons.net.ftp.FTPClient; 
import org.apache.commons.net.ftp.FTPReply; 
 
import com.kandao.yunbell.common.SysApplication; 
 
import android.content.Context; 
import android.util.Log; 
 
public class MyUploadThread extends Thread { 
 private String fileName;//  File name  
 private String filePath;//  File local path  
 private String fileStoragePath;//  File server storage path  
 private String serverAddress;//  Server address  
 private String ftpUserName;// ftp Account number  
 private String ftpPassword;// ftp Password  
 private Context mContext; 
 public MyUploadThread() { 
 super(); 
 // TODO Auto-generated constructor stub 
 } 
 
 public MyUploadThread(Context mContext,String fileName, String filePath, 
  String fileStoragePath,String serverAddress,String ftpUserName,String ftpPassword) { 
 super(); 
 this.fileName = fileName; 
 this.filePath = filePath; 
 this.fileStoragePath = fileStoragePath; 
 this.serverAddress = serverAddress; 
 this.ftpUserName = ftpUserName; 
 this.ftpPassword = ftpPassword; 
 this.mContext=mContext; 
 } 
 
 @Override 
 public void run() { 
 super.run(); 
 try { 
  FileInputStream fis=null; 
  FTPClient ftpClient = new FTPClient(); 
  String[] idPort = serverAddress.split(":"); 
  ftpClient.connect(idPort[0], Integer.parseInt(idPort[1])); 
  int returnCode = ftpClient.getReplyCode(); 
  Log.i("caohai", "returnCode,upload:"+returnCode); 
  boolean loginResult = ftpClient.login(ftpUserName, ftpPassword); 
  Log.i("caohai", "loginResult:"+loginResult); 
  if (loginResult && FTPReply.isPositiveCompletion(returnCode)) {//  If login is successful  
   
  //  Set up the upload directory  
   
  if (((SysApplication) mContext).getIsVideo()) { 
   ((SysApplication) mContext).setIsVideo(false); 
   boolean ff=ftpClient.changeWorkingDirectory(fileStoragePath + "/video/"); 
   Log.i("caohai", "ff:"+ff); 
  }else{ 
  boolean ee=ftpClient.changeWorkingDirectory(fileStoragePath + "/photo/"); 
  Log.i("caohai", "ee:"+ee); 
  } 
  ftpClient.setBufferSize(1024); 
  // ftpClient.setControlEncoding("iso-8859-1"); 
  // ftpClient.enterLocalPassiveMode(); 
  ftpClient.setFileType(FTP.BINARY_FILE_TYPE); 
   fis = new FileInputStream(filePath + "/" 
   + fileName); 
   Log.i("caohai", "fileStoragePath00000:"+fileStoragePath); 
  String[] path = fileStoragePath.split("visitorRecord"); 
   
  boolean fs = ftpClient.storeFile(new String((path[1] 
   + "/photo/" + fileName).getBytes(), "iso-8859-1"), fis); 
  Log.i("caohai", "shifoushangchuanchenggong:"+fs); 
  fis.close(); 
  ftpClient.logout(); 
  //ftpClient.disconnect(); 
  } else {//  If login fails  
  ftpClient.disconnect(); 
  } 
 } catch (NumberFormatException e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
 } catch (SocketException e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
 } catch (FileNotFoundException e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
 } catch (UnsupportedEncodingException e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
 } catch (IOException e) { 
  // TODO Auto-generated catch block 
  e.printStackTrace(); 
 } 
 
 } 
} 

Summarize