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🤟 Introduction to the author: member of China DBA Alliance (ACDU), administrator of CSDN program ape (yuan) gathering places all over the country. Currently engaged in industrial automation software development. Good at C#, Java, machine vision, underlying algorithms and other languages. The July software studio was established in 2019 and registered with Suzhou Kaijie Intelligent Technology Co., Ltd. in 2021
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Enable FTP function
First open control panel – > programs – > enable or disable Windows features:
Check FTP service, web management tool and World Wide Web Service:
Click Finish to wait for it to take effect:
Release port
Open the Windows firewall – > allow applications to pass through the firewall – > click change settings and check the public and private of the FTP server:
Restart the computer
After completing the above operations, restart the computer.
Add FTP access user
Optional. If you set anonymous access to FTP or directly use existing users in Windows, you don't need to create users.
Open the computer management function – > local users and groups, select users, and right-click new users:
Set the user name and password. Check that the password cannot be modified and will never expire. Uncheck other and click Create:
Add FTP site
Open the computer management function, find Internet Information Services in the service, select the user on the left, and right-click to add an FTP site:
Customize the site name and select the file path to be shared by FTP:
Set the IP address as the local IP address. The default port is 21. If there is no SSL, select no SSL:
Check that authentication is basic, that authorization is the specified user, that users can access, and that permissions are write and read (this can be customized according to the specific situation. If you want to set anonymous access, check anonymous, and then allow access. Select all users), and then click OK:
Local access test
File manager input ip address plus port:
Right click and select login (if the login interface does not pop up, anonymous access does not have this operation)
Enter the user name and password and click login:
Normal access:
Modify the file name to test whether it can be modified:
Test remote access FTP (in the same network environment):
After completing the above steps, you can access it.
Modify FTP settings
Open the computer management function, find Internet Information Services in the service, expand the computer user – > website, double-click the created FTP server, and then you can make various modifications:
- Add all user access:
Double click FTP authentication to enable anonymous authentication:
Double click the FTP authorization rule and right-click to add an allow rule:
Select all users, check the read and write permissions, and click OK. You don't need to enter a password when accessing again.
Java integration FTP code implementation
FTP file deletion implementation:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import java.io.File;
import java.io.IOException;
/**
* @author Suzhou program Dabai
* @create 2021/12/16
* @desc File deletion (the function of deleting subfolders in the path has not been realized yet)
*/
public class DeleteFTP {
/**
* @param pathName ftp path where the file / directory is to be deleted
* @param fileName The file name of the ftp where the file is to be deleted
* @param ftpClient FTPClient object
*/
public void deleteFTP(String pathName, String fileName, FTPClient ftpClient) {
try {
ftpClient.changeWorkingDirectory(pathName);// Jump to file directory
ftpClient.enterLocalPassiveMode(); //Set passive mode transmission
if (fileName != null && fileName != "") {
//The file name is not empty. Delete the specified file
ftpClient.deleteFile(pathName + File.separator + fileName);
System.out.println("Delete succeeded");
} else {
//The file name is empty. Delete all files under the path
System.out.println("Deleting");
//Delete file
FTPFile[] files = ftpClient.listFiles();//Get the file collection under the directory
for (FTPFile file : files) {
if (file.isFile()) {
//If it is judged as a file, delete it directly
ftpClient.deleteFile(pathName + File.separator + file.getName());
System.out.println(file + ": Delete operation completed");
}
if (file.isDirectory()) {
/*There is a problem. It is recommended to use thread optimization
//Determine whether it is a folder, and recursively delete the files in the subfolder
deleteFTP(pathName + File.separator + file.getName(), null, ftpClient);
*/
}
}
//remove folders
ftpClient.removeDirectory(pathName);
System.out.println("Delete operation completed");
}
} catch (Exception e) {
System.out.println("Deletion failed");
e.printStackTrace();
} finally {
//Close connection
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
}
}
}
FTP file download implementation:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* @author Suzhou program Dabai
* @create 2021/12/16
* @desc File download (the file function in the sub file in the download path has not been realized yet)
*/
public class DownloadFTP {
/**
* @param pathName ftp path of the file to be downloaded
* @param fileName The file name of the ftp where the file is to be downloaded
* @param downloadPath Path saved after file download
* @param ftpClient FTPClient object
*/
public void downLoadFTP(String pathName, String fileName, String downloadPath, FTPClient ftpClient) {
OutputStream outputStream = null;
try {
ftpClient.changeWorkingDirectory(pathName);// Jump to file directory
ftpClient.enterLocalPassiveMode(); //Set passive mode transmission
if (fileName != null && fileName != "") {
//The file name is not empty. Download the specified file
File filePath = new File(downloadPath);
if (!filePath.exists()) {
filePath.mkdir();//Directory does not exist, create directory
}
outputStream = new FileOutputStream(new File(downloadPath + File.separator + fileName));
ftpClient.retrieveFile(fileName, outputStream);
System.out.println("Download operation completed");
} else {
FTPFile[] files = ftpClient.listFiles();//Get the file collection under the directory
//The file name is empty. All files in the download path (excluding folders)
for (FTPFile file : files) {
File filePath = new File(downloadPath);
if (!filePath.exists()) {
filePath.mkdir();//Directory does not exist, create directory
}
File downloadFile = new File(downloadPath + File.separator + file.getName());
outputStream = new FileOutputStream(downloadFile);
ftpClient.retrieveFile(file.getName(), outputStream);
System.out.println("Download operation completed:" + downloadFile);
}
}
} catch (Exception e) {
System.out.println("Download failed");
e.printStackTrace();
} finally {
//Close connection
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
if(null != outputStream){
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
Connection FTP code implementation:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
import java.io.IOException;
import java.net.MalformedURLException;
/**
* @author Su program Dabai
* @create 2021/12/16
* @desc Link to FTP service
*/
public class InitFTP {
//ftp server IP
private static final String host = "127.0.0.1";
//The ftp server port number defaults to 21
private static final Integer port = 21;
//ftp login account
private static final String username = "ahzoo";
//ftp login password
private static final String password = "123456";
public void initFtpClient(FTPClient ftpClient) {
ftpClient.setControlEncoding("utf-8"); //Set encoding
try {
System.out.println("on connection FTP The server:" + host + ":" + port);
ftpClient.connect(host, port); //Connect to ftp server
ftpClient.login(username, password); //Log in to ftp server
int replyCode = ftpClient.getReplyCode(); //Successfully logged in to the server
if(!FTPReply.isPositiveCompletion(replyCode)){
System.out.println("FTP Server connection failed:" + host + ":" + port);
}
System.out.println("FTP Server connection succeeded:" + host + ":" + port);
}catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
}
Implementation of ftp path code where the mobile file is located:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import java.io.File;
import java.io.IOException;
/**
* @author Su program Dabai
* @create 2021/12/16
* @desc File move / rename
*/
public class MoveFTP {
/**
* @param pathName ftp path where the file is to be moved
* @param fileName The file name of the ftp where the file is to be moved
* @param movePath Path after file movement
* @param moveName The file name after the file is moved (only move without renaming if it is consistent with the source file, and move + rename if it is inconsistent)
* @param ftpClient FTPClient object
*/
public void moveFTP(String pathName, String fileName, String movePath, String moveName, FTPClient ftpClient) {
try {
ftpClient.enterLocalPassiveMode(); //Set passive mode transmission
if (!ftpClient.changeWorkingDirectory(movePath)) {
//Create target directory when jump to target path fails
ftpClient.makeDirectory(movePath);
}
if (moveName != null && moveName != "") {
ftpClient.changeWorkingDirectory(pathName);// Jump back to the directory where you want to operate
//The file name after the move is not empty. Move the target file
//ftpClient. Rename (old file name, new path)
ftpClient.rename(fileName, movePath + File.separator + moveName);
System.out.println("File move operation completed:" + movePath + File.separator + moveName);
} else {
//The file name after the move is empty, and all files in the target path are moved
ftpClient.changeWorkingDirectory(pathName);// Jump back to the directory where you want to operate
FTPFile[] files = ftpClient.listFiles();//Get the file collection under the directory
for (FTPFile file : files) {
ftpClient.rename(file.getName(), movePath + File.separator + file.getName());
System.out.println("Move operation completed:" + file.getName());
}
}
} catch (Exception e) {
System.out.println("Move failed");
e.printStackTrace();
} finally {
//Close connection
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
}
}
}
Read the ftp path code of the file to achieve:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import java.io.*;
/**
* @author Su program Dabai
* @create 2021/12/16
* @desc File reading (the function of reading files in sub files in the path has not been realized yet)
*/
public class ReadFTP {
/**
* @param pathName ftp path where the file is to be read
* @param fileName The file name of the ftp where the file is to be read
* @param ftpClient FTPClient object
*/
public void readFTP(String pathName, String fileName, FTPClient ftpClient) {
InputStream inputStream = null;
BufferedReader reader = null;
try {
System.out.println(pathName);
ftpClient.changeWorkingDirectory(pathName);// Jump to file directory
ftpClient.enterLocalPassiveMode(); //Set passive mode transmission
if (fileName != null && fileName != "") {
//The file name is not empty. Read the specified file
inputStream = ftpClient.retrieveFileStream(fileName);
reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
String fileL;
StringBuffer buffer = new StringBuffer();
while(((fileL=reader.readLine()) != null)){
buffer.append(fileL);
}
System.out.println(fileName + ":" + buffer.toString());
} else {
FTPFile[] files = ftpClient.listFiles();//Get the file collection under the directory
//The file name is empty. Read all files under the path (excluding folders)
System.out.println(files);
for (FTPFile file : files) {
System.out.println(file.getName());
inputStream = ftpClient.retrieveFileStream(file.getName());
System.out.println(inputStream);
reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
String fileL = null;
StringBuffer buffer = new StringBuffer();
while(((fileL=reader.readLine()) != null)){
buffer.append(fileL + "\n");
}
System.out.println(file + ":" + buffer.toString());
//retrieveFileStream uses a stream. It needs to be released, otherwise it will return a null pointer
ftpClient.completePendingCommand();
}
}
} catch (Exception e) {
System.out.println("read failure");
e.printStackTrace();
} finally {
//Close connection
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
if(null != inputStream){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(null != reader) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
Implementation of path code uploaded to ftp server:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* @author Su program Dabai
* @create 2021/12/16
* @desc File upload
*/
public class UploadFTP {
/**
* @param pathName The path to upload the file to the ftp server
* @param fileName The name of the file uploaded to the ftp server
* @param originPath The path where the file to be uploaded is located (absolute path)
**/
public void uploadFile(String pathName, String fileName, String originPath, FTPClient ftpClient){
InputStream inputStream = null;
try{
System.out.println("File transfer in progress");
inputStream = new FileInputStream(new File(originPath));//Convert text data to an input stream
ftpClient.enterLocalPassiveMode(); //Set passive mode transmission
ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);//Input as binary file
ftpClient.makeDirectory(pathName);//Create the target path on the ftp server
ftpClient.changeWorkingDirectory(pathName);//Switch to target path
ftpClient.enterLocalPassiveMode();//Open port
ftpClient.storeFile(fileName, inputStream);//Start uploading. inputStream represents the data source.
//ftpClient.storeFile(new String(fileName.getBytes("UTF-8"),"ISO-8859-1") inputStream);
System.out.println("File upload operation completed");
}catch (Exception e) {
System.out.println("File upload failed");
e.printStackTrace();
}finally{
//Close connection
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
if(null != inputStream){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
Path code implementation for writing text to ftp server:
package org.example;
import org.apache.commons.net.ftp.FTPClient;
import java.io.*;
/**
* @author Su program Dabai
* @create 2021/12/16
* @desc Text writing
*/
public class WriteFTP {
/**
* @param pathName Path to write text to ftp server
* @param fileName The name of the ftp server to which the text is written
* @param contentText Text data to write
**/
public void writeFile(String pathName, String fileName, String contentText, FTPClient ftpClient){
InputStream inputStream = null;
try{
System.out.println("Start write operation");
inputStream = new ByteArrayInputStream(contentText.getBytes());//Convert text data into input stream, and avoid Chinese garbled code through getBytes() method
ftpClient.enterLocalPassiveMode(); //Set passive mode transmission
ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);//Input as binary file
ftpClient.makeDirectory(pathName);//Create the target path on the ftp server
ftpClient.changeWorkingDirectory(pathName);//Switch to target path
ftpClient.enterLocalPassiveMode();//Open port
ftpClient.storeFile(fileName, inputStream);//Start writing, inputStream represents the data source.
System.out.println("Text write operation completed");
}catch (Exception e) {
System.out.println("Text writing failed");
e.printStackTrace();
}finally{
//Close connection
if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOException e){
e.printStackTrace();
}
}
if(null != inputStream){
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
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