java连接Ubuntu、windows FTP服务器获取文件

1、前言

socket数据传输不满足大数据的传输，采用ftp方式传输pcm文件

2、pom

        <dependency>
            <groupId>commons-net</groupId>
            <artifactId>commons-net</artifactId>
            <version>3.6</version>
        </dependency>

3、windows代码

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

import java.io.*;

public class FTPConnectWindowsTest {
    private static String username = "ftpuser";
    private static String password = "123456";
    private static String ip = "192.168.1.19";
    private static Integer port = 21;

    public static void start() {
        String saveDir = "F:/Program/FTP_Save";
        //下载远程文件夹下的 中文 文件
        String remoteFileName = "/1/津巴多普通心理学.pdf";
        String fileName = "津巴多普通心理学.pdf";

        // remoteFileName = "/1/2/654321.pcm";
        // fileName = "654321.pcm";

        downloadFtpFile(remoteFileName, saveDir, fileName);
    }

    public static void downloadFtpFile(String remoteFileName, String saveDir, String fileName) {
        FTPClient ftpClient = new FTPClient();
        int reply;
        try {
            ftpClient.connect(ip, port);
            ftpClient.login(username, password);
            reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                return;
            }
            ftpClient.setControlEncoding("UTF-8");
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.enterLocalPassiveMode();

            File localFile = new File(saveDir + File.separatorChar + fileName);
            OutputStream os = new FileOutputStream(localFile);
            //ftp中文名需要iso-8859-1字符
            boolean flag2 = ftpClient.retrieveFile(new String(remoteFileName.getBytes("GBK"), "iso-8859-1"), os);
            if (!flag2) {
                System.out.println("没有找到" + remoteFileName + "---该文件");
                localFile.delete();
            } else {
                System.out.println("=================== Windows save success");
            }
            os.close();
            ftpClient.logout();
            ftpClient.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

4、Ubuntu代码

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

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

public class FTPConnectUbuntuTest {
    private static String username = "bjlthy";
    private static String password = "xxxxx";
    private static String ip = "192.168.1.90";
    private static Integer port = 21;

    public static void start() {
        String saveDir = "F:/Program/FTP_Save";
        //下载远程文件夹下的 中文 文件
        String remoteFileName = "1234567.pdf";
        remoteFileName = "./3/1234567.pdf";
        String fileName = "津巴多普通心理学.pdf";
        downloadFtpFile(remoteFileName, saveDir, fileName);
    }

    public static void downloadFtpFile(String remoteFileName, String saveDir, String fileName) {
        FTPClient ftpClient = new FTPClient();
        int reply;
        try {
            ftpClient.connect(ip, port);
            ftpClient.login(username, password);
            reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                System.out.println("=================== connect fail");
                ftpClient.disconnect();
                return;
            }
            ftpClient.setControlEncoding("UTF-8");
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.enterLocalPassiveMode();

            File localFile = new File(saveDir + File.separatorChar + fileName);
            OutputStream os = new FileOutputStream(localFile);
            //ftp中文名需要iso-8859-1字符
            boolean flag2 = ftpClient.retrieveFile(new String(remoteFileName.getBytes("GBK"), "iso-8859-1"), os);
            if (!flag2) {
                System.out.println("没有找到" + remoteFileName + "---该文件");
                localFile.delete();
            } else {
                System.out.println("=================== ubuntu save success");
            }
            os.close();
            ftpClient.logout();
            ftpClient.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}