SpringBoot接入ftp/ftps并上传文件和配置的代码指南

        <dependency>
            <groupId>commons-net</groupId>
            <artifactId>commons-net</artifactId>
            <version>3.8.0</version>
        </dependency>

    /**
     * 打开FTP连接
     *
     * @param hostname hostname
     * @param port     port
     * @param username username
     * @param password password
     */
    public static FTPSClient openFTP(String hostname, int port, String username, String password) {
        // 显示方式传false，隐式方式传true
        FTPSClient ftpsClient = new FTPSClient(true);
        ftpsClient.setControlEncoding("UTF-8");
        try {
            System.out.println("ftpsClient connect");
            ftpsClient.connect(hostname, port);
            boolean flag = ftpsClient.login(username, password);
            // 切换到被动模式
            ftpsClient.setControlEncoding("UTF-8");
            ftpsClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpsClient.enterLocalPassiveMode();
            ftpsClient.setFileTransferMode(FTP.STREAM_TRANSFER_MODE);
            ftpsClient.execPROT("P");
            ftpsClient.setAuthValue("TLS");

            if (!flag) {
                System.out.println("login failed");
                return null;
            }

            String path = ftpsClient.printWorkingDirectory();
            System.out.println("path:" + path);

        } catch (Exception e) {
            e.printStackTrace();
        }
        return ftpsClient;
    }

/**
     * 创建多层目录文件，如果有ftp服务器已存在该文件，则不创建，如果无，则创建
     *
     * @param filePath   上传文件本地路径
     * @param ftpPath    上传文件FTP路径
     * @param ftpsClient ftp客户端
     */
    public static void uploadFileToFTP(String filePath, String ftpPath, FTPSClient ftpsClient) {
        try {
            File file = new File(filePath);

            boolean changeFlag = ftpsClient.changeWorkingDirectory(ftpPath);
            System.out.println("changeFlag:" + changeFlag);
            if (!changeFlag) {
                boolean createFlag = createDirectory(ftpPath, ftpsClient);
                System.out.println("createFlag:" + createFlag);
            }

            String uploadPath = ftpsClient.printWorkingDirectory();
            System.out.println("uploadPath:" + uploadPath);

            ftpsClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            boolean uploadFlag = ftpsClient.storeUniqueFile(file.getName(), new FileInputStream(file));

            System.out.println("uploadFlag:" + uploadFlag);
            System.out.println("uploadFlag:" + ftpsClient.getReplyString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 关闭FTP连接
     *
     * @param ftpsClient ftp客户端
     */
    public static void closeFTP(FTPSClient ftpsClient) {
        try {
            ftpsClient.logout();
            ftpsClient.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

/**
     * 创建多层目录文件，如果有ftp服务器已存在该文件，则不创建，如果无，则创建
     *
     * @param remote     目录
     * @param ftpsClient ftp客户端
     */
    public static boolean createDirectory(String remote, FTPSClient ftpsClient) {
        String directory = remote;
        try {
            if (!remote.endsWith("/")) {
                directory = directory + "/";
            }
            // 如果远程目录不存在，则递归创建远程服务器目录
            if (!directory.equals("/") && !ftpsClient.changeWorkingDirectory(directory)) {
                int start = 0;
                int end = 0;
                if (directory.startsWith("/")) {
                    start = 1;
                } else {
                    start = 0;
                }
                end = directory.indexOf("/", start);
                String paths = "", path = "";
                while (true) {
                    String subDirectory = remote.substring(start, end);
                    path = path + "/" + subDirectory;
                    // 目录不存在就创建
                    if (!ftpsClient.changeWorkingDirectory(subDirectory)) {
                        if (ftpsClient.makeDirectory(subDirectory)) {
                            ftpsClient.changeWorkingDirectory(subDirectory);
                        }
                    }
                    paths = paths + "/" + subDirectory;
                    start = end + 1;
                    end = directory.indexOf("/", start);
                    // 检查所有目录是否创建完毕
                    if (end <= start) {
                        break;
                    }
                }
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

public static void main(String[] args) {

        // 打开ftp连接
        FTPSClient ftpsClient = openFTP("192.168.1.100", 10012, "test1", "123456");
        if (null == ftpsClient) {
            return;
        }
        // 上传文件
        uploadFileToFTP("C:\\Users\\10187\\Desktop\\ftp.txt", "/TEST/PICTURE", ftpsClient);
        // 下载文件
        downloadFileFromFTP(ftpsClient);

        // 关闭ftp连接
        closeFTP(ftpsClient);
    }

openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/vsftpd/vsftpd_ssl_key.pem -out /etc/vsftpd/vsftpd_ssl_cert.pem

ssl_enable=YES
ssl_tlsv1=YES
ssl_sslv2=YES
ssl_sslv3=YES
allow_anon_ssl=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
rsa_cert_file=/etc/vsftpd/vsftpd_ssl_cert.pem
rsa_private_key_file=/etc/vsftpd/vsftpd_ssl_key.pem
require_ssl_reuse=NO

systemctl restart vsftpd

implicit_ssl=YES