ftp与sftp连接服务器，获取服务器列表，上传下载相关文件

如果对ftp和sftp不是很了解的，可以查看下方连接

ftp与sftp说明链接

ftp连接

需要引入jar包

   <dependency>
       <groupId>commons-net</groupId>
       <artifactId>commons-net</artifactId>
       <version>3.3</version>
   </dependency>

jar包的话我就提供一个公共的maven仓库链接，自己去找吧

ftp工具类

package com.waving.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.log4j.Logger;

public class FTPUtil {

    private static Logger log = Logger.getLogger("FTPUtil.class");

    private String host = "47.92.134.102";
    private int port = 21;
    private String username = "root";
    private String password = "password";

    public FTPUtil(String host, String port, String username, String password) {
        this.host = host;
        this.port = Integer.parseInt(port);
        this.username = username;
        this.password = password;
    }

    public File downloadFile(String remotePath, String remoteFileName, String localPath, String localFileName) {
        FTPClient ftpClient = new FTPClient();
        FileOutputStream outputStream = null;
        File file = null;
        try {
            log.info(">>>>>>>>FTP-->downloadFile--登录开始>>>>>>>>>>>>>");

            ftpClient.connect(host, port);
            //设置ftp连接模式 被动模式
            ftpClient.enterLocalPassiveMode();

            boolean login = ftpClient.login(username, password);

            if (login) {
                log.info(">>>>>>>>FTP-->downloadFile--登录成功>>>>>>>>>>>>>");
            }
            else {
                log.info(">>>>>>>>FTP-->downloadFile--登录失败>>>>>>>>>>>>>");
                throw new RuntimeException("FTP登陆失败,请检查用户信息！");
            }

            boolean isDownload = false;

            file = new File(localPath + localFileName);
            if (file.exists()) {
                file.delete();
            }
            file.createNewFile();

            //切换文件路径
            ftpClient.makeDirectory(remotePath);
            ftpClient.changeWorkingDirectory(remotePath);

            FTPFile[] ftpFiles = ftpClient.listFiles();
            for (FTPFile ftpFile : ftpFiles) {
                if (ftpFile.getName().equals(remoteFileName)) {
                    outputStream = new FileOutputStream(file);

                    isDownload = ftpClient.retrieveFile(ftpFile.getName(), outputStream);
                }
            }

            if (isDownload) {
                log.info(">>>>>>>>FTP-->downloadFile--文件下载成功！本地路径：" + file);
            }
            else {
                throw new RuntimeException("FTP-->downloadFile--文件下载失败！请检查！");
            }

        }
        catch (IOException e) {
            e.printStackTrace();
        }
        finally {
            try {
                outputStream.close();
                ftpClient.disconnect();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }
        return file;
    }

    public void uploadFile(String remotePath, String remoteFileName, String localPath, String localFileName) {
        FTPClient ftpClient = new FTPClient();
        FileInputStream inputStream = null;
        log.info(">>>>>>>>FTP-->uploadFile--登录开始>>>>>>>>>>>>>");

        ftpClient.enterLocalPassiveMode();//设置成被动FTP模式
        try {
            boolean login = ftpClient.login(username, password);
            if (login) {
                log.info(">>>>>>>>FTP-->uploadFile--登录成功>>>>>>>>>>>>>");
            }
            else {
                log.info(">>>>>>>>FTP-->uploadFile--登录失败>>>>>>>>>>>>>");
                throw new RuntimeException("FTP登陆失败,请检查用户信息！");
            }

            //切换文件路径
            ftpClient.makeDirectory(remotePath);
            ftpClient.changeWorkingDirectory(remotePath);
            inputStream = new FileInputStream(new File(localPath + localFileName));
            //可上传多文件
            boolean isUpload = ftpClient.storeFile(remoteFileName, inputStream);

            if (isUpload) {
                log.info(">>>>>>>>FTP-->uploadFile--文件上传成功!");
            } else {
                log.info(">>>>>>>>FTP-->uploadFile--文件上传失败!");
                throw new RuntimeException("文件上传失败!");
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        finally {
            try {
                inputStream.close();
                ftpClient.disconnect();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        FTPClient ftpClient = new FTPClient();
        try {
            ftpClient.connect("47.92.134.102", 21);

            boolean login = ftpClient.login("Anonymous", "");
            System.out.println("login = " + login);
            ftpClient.setAutodetectUTF8(true);
            ftpClient.makeDirectory("/home/ftpuser");
            ftpClient.changeWorkingDirectory("/home/ftpuser");
            FTPFile[] ftpFiles = ftpClient.listFiles("*");
            for (FTPFile ftpFile : ftpFiles) {
                String name = ftpFile.getName();
                System.out.println("name = " + name);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

sftp连接

需要jar包

<dependency>
    <groupId>com.jcraft</groupId>
    <artifactId>jsch</artifactId>
    <version>0.1.54</version>
</dependency>

sftp工具类,这段代码是网上抄的，但根据他的代码实际可用

package com.waving.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.Vector;
import org.apache.log4j.Logger;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpATTRS;
import com.jcraft.jsch.SftpException;
import com.jcraft.jsch.ChannelSftp.LsEntry;
/**
 * sftp工具类
 *
 * @author waving
 * @date 2021-3-12
 * 
 * @version 1.0
 */
public class SFTPUtils
{
    private static Logger log = Logger.getLogger(SFTPUtils.class.getName());

    private String host;//服务器连接ip
    private String username;//用户名
    private String password;//密码
    private int port = 22;//端口号
    private ChannelSftp sftp = null;
    private Session sshSession = null;

    public SFTPUtils(){}

    public SFTPUtils(String host, int port, String username, String password)
    {
        this.host = host;
        this.username = username;
        this.password = password;
        this.port = port;
    }

    public SFTPUtils(String host, String username, String password)
    {
        this.host = host;
        this.username = username;
        this.password = password;
    }

    /**
     * 通过SFTP连接服务器
     */
    public void connect()
    {
        try
        {
            JSch jsch = new JSch();
            jsch.getSession(username, host, port);
            sshSession = jsch.getSession(username, host, port);
            if (log.isInfoEnabled())
            {
                log.info("Session created.");
            }
            sshSession.setPassword(password);
            Properties sshConfig = new Properties();
            sshConfig.put("StrictHostKeyChecking", "no");
            sshSession.setConfig(sshConfig);
            sshSession.connect();
            if (log.isInfoEnabled())
            {
                log.info("Session connected.");
            }
            Channel channel = sshSession.openChannel("sftp");
            channel.connect();
            if (log.isInfoEnabled())
            {
                log.info("Opening Channel.");
            }
            sftp = (ChannelSftp) channel;
            if (log.isInfoEnabled())
            {
                log.info("Connected to " + host + ".");
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 关闭连接
     */
    public void disconnect()
    {
        if (this.sftp != null)
        {
            if (this.sftp.isConnected())
            {
                this.sftp.disconnect();
                if (log.isInfoEnabled())
                {
                    log.info("sftp is closed already");
                }
            }
        }
        if (this.sshSession != null)
        {
            if (this.sshSession.isConnected())
            {
                this.sshSession.disconnect();
                if (log.isInfoEnabled())
                {
                    log.info("sshSession is closed already");
                }
            }
        }
    }

    /**
     * 批量下载文件
     * @param remotePath：远程下载目录(以路径符号结束,可以为相对路径eg:/assess/sftp/jiesuan_2/2014/)
     * @param localPath：本地保存目录(以路径符号结束,D:\Duansha\sftp\)
     * @param fileFormat：下载文件格式(以特定字符开头,为空不做检验)
     * @param fileEndFormat：下载文件格式(文件格式)
     * @param del：下载后是否删除sftp文件
     * @return
     */
    public List<String> batchDownLoadFile(String remotePath, String localPath,
                                          String fileFormat, String fileEndFormat, boolean del)
    {
        List<String> filenames = new ArrayList<String>();
        try
        {
            // connect();
            Vector v = listFiles(remotePath);
            // sftp.cd(remotePath);
            if (v.size() > 0)
            {
                System.out.println("本次处理文件个数不为零,开始下载...fileSize=" + v.size());
                Iterator it = v.iterator();
                while (it.hasNext())
                {
                    LsEntry entry = (LsEntry) it.next();
                    String filename = entry.getFilename();
                    SftpATTRS attrs = entry.getAttrs();
                    if (!attrs.isDir())
                    {
                        boolean flag = false;
                        String localFileName = localPath + filename;
                        fileFormat = fileFormat == null ? "" : fileFormat
                                .trim();
                        fileEndFormat = fileEndFormat == null ? ""
                                : fileEndFormat.trim();
                        // 三种情况
                        if (fileFormat.length() > 0 && fileEndFormat.length() > 0)
                        {
                            if (filename.startsWith(fileFormat) && filename.endsWith(fileEndFormat))
                            {
                                flag = downloadFile(remotePath, filename,localPath, filename);
                                if (flag)
                                {
                                    filenames.add(localFileName);
                                    if (flag && del)
                                    {
                                        deleteSFTP(remotePath, filename);
                                    }
                                }
                            }
                        }
                        else if (fileFormat.length() > 0 && "".equals(fileEndFormat))
                        {
                            if (filename.startsWith(fileFormat))
                            {
                                flag = downloadFile(remotePath, filename, localPath, filename);
                                if (flag)
                                {
                                    filenames.add(localFileName);
                                    if (flag && del)
                                    {
                                        deleteSFTP(remotePath, filename);
                                    }
                                }
                            }
                        }
                        else if (fileEndFormat.length() > 0 && "".equals(fileFormat))
                        {
                            if (filename.endsWith(fileEndFormat))
                            {
                                flag = downloadFile(remotePath, filename,localPath, filename);
                                if (flag)
                                {
                                    filenames.add(localFileName);
                                    if (flag && del)
                                    {
                                        deleteSFTP(remotePath, filename);
                                    }
                                }
                            }
                        }
                        else
                        {
                            flag = downloadFile(remotePath, filename,localPath, filename);
                            if (flag)
                            {
                                filenames.add(localFileName);
                                if (flag && del)
                                {
                                    deleteSFTP(remotePath, filename);
                                }
                            }
                        }
                    }
                }
            }
            if (log.isInfoEnabled())
            {
                log.info("download file is success:remotePath=" + remotePath
                        + "and localPath=" + localPath + ",file size is"
                        + v.size());
            }
        }
        catch (SftpException e)
        {
            e.printStackTrace();
        }
        finally
        {
            // this.disconnect();
        }
        return filenames;
    }

    /**
     * 下载单个文件
     * @param remotePath：远程下载目录(以路径符号结束)
     * @param remoteFileName：下载文件名
     * @param localPath：本地保存目录(以路径符号结束)
     * @param localFileName：保存文件名
     * @return
     */
    public boolean downloadFile(String remotePath, String remoteFileName,String localPath, String localFileName)
    {
        FileOutputStream fieloutput = null;
        try
        {
            // sftp.cd(remotePath);
            File file = new File(localPath + localFileName);
            // mkdirs(localPath + localFileName);
            fieloutput = new FileOutputStream(file);
            sftp.get(remotePath + remoteFileName, fieloutput);
            if (log.isInfoEnabled())
            {
                log.info("===DownloadFile:" + remoteFileName + " success from sftp.");
            }
            return true;
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (SftpException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (null != fieloutput)
            {
                try
                {
                    fieloutput.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
        return false;
    }

    /**
     * 上传单个文件
     * @param remotePath：远程保存目录
     * @param remoteFileName：保存文件名
     * @param localPath：本地上传目录(以路径符号结束)
     * @param localFileName：上传的文件名
     * @return
     */
    public boolean uploadFile(String remotePath, String remoteFileName,String localPath, String localFileName)
    {
        FileInputStream in = null;
        try
        {
            createDir(remotePath);
            File file = new File(localPath + localFileName);
            in = new FileInputStream(file);
            sftp.put(in, remoteFileName);
            return true;
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (SftpException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (in != null)
            {
                try
                {
                    in.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
        return false;
    }

    /**
     * 批量上传文件
     * @param remotePath：远程保存目录
     * @param localPath：本地上传目录(以路径符号结束)
     * @param del：上传后是否删除本地文件
     * @return
     */
    public boolean bacthUploadFile(String remotePath, String localPath,
                                   boolean del)
    {
        try
        {
            connect();
            File file = new File(localPath);
            File[] files = file.listFiles();
            for (int i = 0; i < files.length; i++)
            {
                if (files[i].isFile()
                        && files[i].getName().indexOf("bak") == -1)
                {
                    if (this.uploadFile(remotePath, files[i].getName(),
                            localPath, files[i].getName())
                            && del)
                    {
                        deleteFile(localPath + files[i].getName());
                    }
                }
            }
            if (log.isInfoEnabled())
            {
                log.info("upload file is success:remotePath=" + remotePath
                        + "and localPath=" + localPath + ",file size is "
                        + files.length);
            }
            return true;
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            this.disconnect();
        }
        return false;

    }

    /**
     * 删除本地文件
     * @param filePath
     * @return
     */
    public boolean deleteFile(String filePath)
    {
        File file = new File(filePath);
        if (!file.exists())
        {
            return false;
        }

        if (!file.isFile())
        {
            return false;
        }
        boolean rs = file.delete();
        if (rs && log.isInfoEnabled())
        {
            log.info("delete file success from local.");
        }
        return rs;
    }

    /**
     * 创建目录
     * @param createpath
     * @return
     */
    public boolean createDir(String createpath)
    {
        try
        {
            if (isDirExist(createpath))
            {
                this.sftp.cd(createpath);
                return true;
            }
            String pathArry[] = createpath.split("/");
            StringBuffer filePath = new StringBuffer("/");
            for (String path : pathArry)
            {
                if (path.equals(""))
                {
                    continue;
                }
                filePath.append(path + "/");
                if (isDirExist(filePath.toString()))
                {
                    sftp.cd(filePath.toString());
                }
                else
                {
                    // 建立目录
                    sftp.mkdir(filePath.toString());
                    // 进入并设置为当前目录
                    sftp.cd(filePath.toString());
                }

            }
            this.sftp.cd(createpath);
            return true;
        }
        catch (SftpException e)
        {
            e.printStackTrace();
        }
        return false;
    }

    /**
     * 判断目录是否存在
     * @param directory
     * @return
     */
    public boolean isDirExist(String directory)
    {
        boolean isDirExistFlag = false;
        try
        {
            SftpATTRS sftpATTRS = sftp.lstat(directory);
            isDirExistFlag = true;
            return sftpATTRS.isDir();
        }
        catch (Exception e)
        {
            if (e.getMessage().toLowerCase().equals("no such file"))
            {
                isDirExistFlag = false;
            }
        }
        return isDirExistFlag;
    }

    /**
     * 删除stfp文件
     * @param directory：要删除文件所在目录
     * @param deleteFile：要删除的文件
     *
     */
    public void deleteSFTP(String directory, String deleteFile)
    {
        try
        {
            // sftp.cd(directory);
            sftp.rm(directory + deleteFile);
            if (log.isInfoEnabled())
            {
                log.info("delete file success from sftp.");
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 如果目录不存在就创建目录
     * @param path
     */
    public void mkdirs(String path)
    {
        File f = new File(path);

        String fs = f.getParent();

        f = new File(fs);

        if (!f.exists())
        {
            f.mkdirs();
        }
    }

    /**
     * 列出目录下的文件
     *
     * @param directory：要列出的目录
     * 
     * @return
     * @throws SftpException
     */
    public Vector listFiles(String directory) throws SftpException
    {
        return sftp.ls(directory);
    }

    public String getHost()
    {
        return host;
    }

    public void setHost(String host)
    {
        this.host = host;
    }

    public String getUsername()
    {
        return username;
    }

    public void setUsername(String username)
    {
        this.username = username;
    }

    public String getPassword()
    {
        return password;
    }

    public void setPassword(String password)
    {
        this.password = password;
    }

    public int getPort()
    {
        return port;
    }

    public void setPort(int port)
    {
        this.port = port;
    }

    public ChannelSftp getSftp()
    {
        return sftp;
    }

    public void setSftp(ChannelSftp sftp)
    {
        this.sftp = sftp;
    }

    /**测试*/
    public static void main(String[] args)
    {
        SFTPUtils sftp = null;
        // 本地存放地址
        String localPath = "D:/tomcat5/webapps/ASSESS/DocumentsDir/DocumentTempDir/txtData/";
        // Sftp下载路径
        String sftpPath = "/home/assess/sftp/jiesuan_2/2014/";
        List<String> filePathList = new ArrayList<String>();
        try
        {
            sftp = new SFTPUtils("10.163.201.115", "tdcp", "tdcp");
            sftp.connect();
            // 下载
            sftp.batchDownLoadFile(sftpPath, localPath, "ASSESS", ".txt", true);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            sftp.disconnect();
        }
    }
}

附注：因为项目需要，所以上网上查找了一些方法，在此做下记录！！！