ftp连接池客户端

1、添加ftp配置

package com.scenetec.isv.utils.ftp.config;

import lombok.Getter;
import lombok.Setter;
import org.apache.commons.net.ftp.FTP;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * @author shendunyuan@scenetec.com
 * @date 2018/12/19
 */
@Getter
@Setter
@Component
@ConfigurationProperties(ignoreUnknownFields = false, prefix = "ftp.client")
public class FtpClientProperties {

    /**
     * ftp地址
     */
    private String host;

    /**
     * 端口号
     */
    private Integer port = 21;

    /**
     * 登录用户
     */
    private String username;

    /**
     * 登录密码
     */
    private String password;

    /**
     * 被动模式
     */
    private boolean passiveMode = false;

    /**
     * 编码
     */
    private String encoding = "UTF-8";

    /**
     * 连接超时时间(秒)
     */
    private Integer connectTimeout;

    /**
     * 缓冲大小
     */
    private Integer bufferSize = 1024;

    /**
     * 设置keepAlive
     * 单位:秒  0禁用
     */
    private Integer keepAliveTimeout = 0;

    /**
     * 传输文件类型
     */
    private Integer transferFileType = FTP.BINARY_FILE_TYPE;

}

ftp:
 client:
    host: 132.232.68.30
    port: 21
    username: isv
    password: xintai1234
    passiveMode: true

2、ftp客户端工厂处理类

package com.scenetec.isv.utils.ftp.core;

import com.scenetec.isv.utils.ftp.config.FtpClientProperties;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.commons.pool2.BasePooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;
import org.springframework.stereotype.Component;

/**
 * @author shendunyuan@scenetec.com
 * @date 2018/12/19
 */
@Slf4j
@Component
public class FtpClientFactory extends BasePooledObjectFactory<FTPClient> {

    private FtpClientProperties config;

    public FtpClientFactory(FtpClientProperties config) {
        this.config = config;
    }

    @Override
    public FTPClient create() {

        FTPClient ftpClient = new FTPClient();
        ftpClient.setControlEncoding(config.getEncoding());
        if (null != config.getConnectTimeout()) {
            ftpClient.setConnectTimeout(config.getConnectTimeout());
        }

        try {
            ftpClient.connect(config.getHost(), config.getPort());
            int replyCode = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(replyCode)) {
                ftpClient.disconnect();
                log.warn("FTPServer refused connection,replyCode:{}", replyCode);
                return null;
            }

            if (!ftpClient.login(config.getUsername(), config.getPassword())) {
                log.warn("FTPClient login failed... username is {}; password: {}", config.getUsername(), config.getPassword());
            }

            ftpClient.setBufferSize(config.getBufferSize());
            ftpClient.setFileType(config.getTransferFileType());
            if (config.isPassiveMode()) {
                ftpClient.enterLocalPassiveMode();
            }

        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("Failed to create FTP connection");
        }

        return ftpClient;
    }

    void destroyObject(FTPClient client) {
        destroyObject(wrap(client));
    }

    /**
     * 用PooledObject封装对象放入池中
     * @param ftpClient ftp客户端
     * @return 默认池对象
     */
    @Override
    public PooledObject<FTPClient> wrap(FTPClient ftpClient) {
        return new DefaultPooledObject<>(ftpClient);
    }

    /**
     * 销毁FtpClient对象
     * @param ftpPooled ftp池对象
     */
    @Override
    public void destroyObject(PooledObject<FTPClient> ftpPooled) {
        if (ftpPooled == null) {
            return;
        }

        FTPClient ftpClient = ftpPooled.getObject();

        close(ftpClient);
    }

    /**
     * 销毁FtpClient对象
     * @param client ftp对象
     */
    public void close(FTPClient client) {
        try {
            if (client.isConnected()) {
                client.logout();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("Failure to destroy FTP connection pool.");
        } finally {
            try {
                client.disconnect();
            } catch (Exception ex) {
                ex.printStackTrace();
                log.error("Failed to close FTP connection pool.");
            }
        }
    }

    /**
     * 验证FtpClient对象
     * @param ftpPooled ftp池对象
     * @return 发送一个NOOP命令到FTP服务器，如果成功返回true，否则为false。
     */
    @Override
    public boolean validateObject(PooledObject<FTPClient> ftpPooled) {
        try {
            FTPClient ftpClient = ftpPooled.getObject();
            if (ftpClient == null) {
                return false;
            }
            if (!ftpClient.isConnected()) {
                return false;
            }
            return ftpClient.sendNoOp();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return false;
    }

}

3、ftp资源池处理类

package com.scenetec.isv.utils.ftp.core;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.pool2.BaseObjectPool;
import org.springframework.util.ObjectUtils;

import java.util.NoSuchElementException;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

/**
 * @author shendunyuan@scenetec.com
 * @date 2018/12/19
 */
@Slf4j
public class FtpClientPool extends BaseObjectPool<FTPClient> {

    private static final int DEFAULT_POOL_SIZE = 5;
    private final BlockingQueue<FTPClient> pool;
    private final FtpClientFactory factory;


    /**
     * 初始化连接池，需要注入一个工厂来提供FTPClient实例
     * @param factory
     */
    public FtpClientPool(FtpClientFactory factory) {
        this(DEFAULT_POOL_SIZE, factory);
    }

    public FtpClientPool(int poolSize, FtpClientFactory factory) {
        this.factory = factory;
        this.pool = new ArrayBlockingQueue<>(poolSize * 2);
        initPool(poolSize);
    }

    /**
     * 初始化连接池，需要注入一个工厂来提供FTPClient实例
     * @param maxPoolSize
     */
    private void initPool(int maxPoolSize) {
        try {
            for (int i = 0; i < maxPoolSize; i++) {
                addObject();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new RuntimeException("Failed to initialize FTP thread pool.");
        }
    }

    /**
     * 客户端从池中借出一个对象
     * @return
     * @throws Exception
     * @throws NoSuchElementException
     * @throws IllegalStateException
     */
    @Override
    public FTPClient borrowObject() throws Exception, NoSuchElementException, IllegalStateException {
        FTPClient client = pool.take();
        if (ObjectUtils.isEmpty(client)) {
            // 创建新的连接
            client = factory.create();
        }
        // 验证对象是否有效
        else if (!factory.validateObject(factory.wrap(client))) {
            // 对无效的对象进行处理
            invalidateObject(client);
            // 创建新的对象
            client = factory.create();
        }
        // 返回ftp对象
        return client;
    }

    /**
     * 返还对象到连接池中
     * @param client
     * @throws Exception
     */
    @Override
    public void returnObject(FTPClient client) {
        try {
            long timeout = 3L;
            if (client != null) {
                if (client.isConnected()) {
                    if (pool.size() < DEFAULT_POOL_SIZE) {
                        // 添加回队列
                        if (!pool.offer(client, timeout, TimeUnit.SECONDS)) {
                            factory.destroyObject(client);
                        }
                    } else {
                        factory.destroyObject(client);
                    }
                } else {
                    factory.destroyObject(client);
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("Failed to return FTP connection object.");
        }
    }

    /**
     * 移除无效的对象
     * @param client
     * @throws Exception
     */
    @Override
    public void invalidateObject(FTPClient client) {
        try {
            // 移除无效对象
            pool.remove(client);
            // 注销对象
            factory.destroyObject(client);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("Failed to remove invalid FTP object.");
        }
    }

    /**
     * 增加一个新的链接，超时失效
     * @throws Exception
     * @throws IllegalStateException
     * @throws UnsupportedOperationException
     */
    @Override
    public void addObject() throws Exception, IllegalStateException, UnsupportedOperationException {
        pool.offer(factory.create(), 3, TimeUnit.SECONDS);
    }

    @Override
    public void close() {
        try {
            while (pool.iterator().hasNext()) {
                FTPClient client = pool.take();
                factory.destroyObject(client);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("Failed to close FTP object.");
        }
    }
}

4、ftp上传下载基础处理类

package com.scenetec.isv.utils.ftp.template;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.net.ftp.FTPClient;

import java.io.*;

/**
 * @author shendunyuan@scenetec.com
 * @date 2019/1/22
 */
@Slf4j
public abstract class FtpBaseTemplate {

    /**
     * 上传文件
     *
     * @param localPath 本地路径
     * @param remotePath 远程路径，必须包含文件名（"/"为当前ftp用户根路径）
     * @return 上传成功返回true， 否则返回false
     */
    public boolean uploadFile(String localPath, String remotePath) {
        if (StringUtils.isBlank(localPath)) {
            log.error("本地文件路径为空");
            return false;
        }
        return uploadFile(new File(localPath), remotePath);
    }

    /**
     * 上传文件
     *
     * @param localFile 本地文件
     * @param remotePath 远程文件，必须包含文件名
     * @return 上传成功返回true， 否则返回false
     */
    public boolean uploadFile(File localFile, String remotePath) {
        if (!localFile.exists()) {
            log.error("本地文件不存在");
            return false;
        }
        if (!localFile.isFile()) {
            log.error("上传类型不是文件");
        }
        if (StringUtils.isBlank(remotePath)) {
            remotePath = "/";
        }
        FileInputStream fis = null;
        BufferedInputStream bis = null;
        try {
            fis = new FileInputStream(localFile);
            bis = new BufferedInputStream(fis);
            // 上传
            return uploadFile(bis, remotePath);
        } catch (FileNotFoundException fex) {
            fex.printStackTrace();
            log.error("系统找不到指定的文件：{}", localFile);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("上传文件异常。");
        } finally {
            try {
                if (bis != null) {
                    bis.close();
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
            try {
                if (fis != null) {
                    fis.close();
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return false;
    }

    /**
     * 上传文件
     *
     * @param fileContent 文件内容
     * @param remotePath 远程文件，必须包含文件名
     * @return 上传成功返回true， 否则返回false
     */
    public boolean uploadFile(byte[] fileContent, String remotePath) {
        if (fileContent == null || fileContent.length <= 0) {
            log.error("上传文件内容为空。");
            return false;
        }
        InputStream is = null;
        try {
            is = new ByteArrayInputStream(fileContent);
            // 上传
            return uploadFile(is, remotePath);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("上传文件异常。原因：【{}】", ex.getMessage());
        } finally {
            try {
                if (is != null) {
                    is.close();
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return false;
    }

    /**
     * 下载文件
     * @param remotePath 远程文件，必须包含文件名
     * @param localPath 本地路径，必须包含文件名（全路径）
     * @return 下载成功返回true，否则返回false
     */
    public boolean downloadFile(String remotePath, String localPath) {
        if (StringUtils.isBlank(remotePath)) {
            remotePath = "/";
        }
        if (StringUtils.isBlank(localPath)) {
            log.error("本地文件路径为空");
            return false;
        }
        return downloadFile(new File(localPath), remotePath);
    }

    /**
     * 下载文件
     * @param remotePath 远程文件，必须包含文件名
     * @param localFile 本地文件
     * @return 下载成功返回true，否则返回false
     */
    public boolean downloadFile(File localFile, String remotePath) {
        // 创建本地文件路径
        if (!localFile.exists()) {
            File parentFile = localFile.getParentFile();
            if (!parentFile.exists()) {
                boolean bool = parentFile.mkdirs();
                if (!bool) {
                    log.error("创建本地路径失败");
                    return false;
                }
            }
        }
        OutputStream os = null;
        try {
            os = new FileOutputStream(localFile);
            // 下载
            return downloadFile(remotePath, os);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("下载文件异常。原因：【{}】", ex.getMessage());
        } finally {
            try {
                if (os != null) {
                    os.close();
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return false;
    }

    /**
     * 删除文件
     * @param remotePath 远程文件，必须包含文件名
     * @return 删除成功返回true，否则返回false
     */
    public boolean deleteFile(String remotePath) {
        if (StringUtils.isBlank(remotePath)) {
            log.info("远程路径为空");
            return false;
        }
        return deleFile(remotePath);
    }

    /**
     * 上传文件
     * @param inputStream 文件流
     * @param remotePath 远程路径，必须包含文件名
     * @return 上传成功返回true，否则返回false
     */
    protected abstract boolean uploadFile(InputStream inputStream, String remotePath);
    /**
     * 下载文件
     * @param remotePath 远程文件，必须包含文件名
     * @param outputStream 本地文件流
     * @return 下载成功返回true，否则返回false
     */
    protected abstract boolean downloadFile(String remotePath, OutputStream outputStream);
    /**
     * 删除文件
     * @param remotePath 程文件，必须包含文件名
     * @return 删除成功返回true，否则返回false
     */
    protected abstract boolean deleFile(String remotePath);

    /**
     * 上传文件
     *
     * @param client ftp客户端
     * @param inputStream 文件流
     * @param remotePath 远程文件，必须包含文件名
     * @return 上传成功返回true， 否则返回false
     */
    protected boolean uploadHandle(FTPClient client, InputStream inputStream, String remotePath) {
        // 上传
        try {
            // 获取远程文件路径
            String remoteFilePath = getRemoteFilePath(remotePath);
            // 获取远程文件名
            String remoteFileName = getRemoteFileName(remotePath);
            // 切换工作路径
            boolean bool = changeDirectory(client, remoteFilePath);
            if (!bool) {
                log.error("切换工作路径失败，{}", client.getReplyString());
                return false;
            }
            // 设置重试次数
            final int retryTime = 3;
            boolean retryResult = false;

            for (int i = 0; i <= retryTime; i++) {
                boolean success = client.storeFile(remoteFileName, inputStream);
                if (success) {
                    log.info("文件【{}】上传成功。", remotePath);
                    retryResult = true;
                    break;
                } else {
                    log.error("文件上传失败。{}", client.getReplyString());
                }
                log.warn("文件【{}】上传失败,重试上传...尝试{}次", remotePath, i);
            }

            return retryResult;
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("上传文件异常。");
        }

        return false;
    }

    /**
     * 下载文件
     * @param client ftp客户端
     * @param remotePath 远程文件，必须包含文件名
     * @param outputStream 本地文件流
     * @return 下载成功返回true，否则返回false
     */
    protected boolean downloadHandle(FTPClient client, String remotePath, OutputStream outputStream) {
        // 下载
        try {
            // 获取远程文件路径
            String remoteFilePath = getRemoteFilePath(remotePath);
            // 获取远程文件名
            String remoteFileName = getRemoteFileName(remotePath);
            // 切换工作路径
            boolean bool = client.changeWorkingDirectory(remoteFilePath);
            if (!bool) {
                log.error("切换工作路径失败，{}", client.getReplyString());
                return false;
            }
            // 设置重试次数
            final int retryTime = 3;
            boolean retryResult = false;

            for (int i = 0; i <= retryTime; i++) {
                boolean success = client.retrieveFile(remoteFileName, outputStream);
                if (success) {
                    log.info("文件【{}】下载成功。", remotePath);
                    retryResult = true;
                    break;
                } else {
                    log.error("文件下载失败。 {}", client.getReplyString());
                }
                log.warn("文件【{}】下载失败，重试下载...尝试{}次", remotePath, i);
            }
            // 返回结果
            return retryResult;
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("下载文件异常。");
        } finally {

        }
        return false;
    }

    /**
     * 删除文件
     * @param remotePath 远程文件，必须包含文件名
     * @return 删除成功返回true，否则返回false
     */
    protected boolean deleteHandle(FTPClient client, String remotePath) {
        try {
            // 删除文件
            boolean bool = client.deleteFile(remotePath);
            if (!bool) {
                log.error("删除文件失败，{}", client.getReplyString());
            }
            return bool;
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("删除文件异常。");
        }
        return false;
    }

    /**
     * 获取远程工作目录
     * @param remotePath 远程路径
     * @return 返回工作路径
     */
    private String getRemoteFilePath(String remotePath) {
        if (StringUtils.isNotBlank(remotePath)) {
            return remotePath.substring(0, remotePath.lastIndexOf("/") + 1);
        }
        return "/";
    }

    /**
     * 获取远程文件名
     * @param remotePath 远程路径
     * @return 返回文件名
     */
    private String getRemoteFileName(String remotePath) {
        if (StringUtils.isNotBlank(remotePath)) {
            return remotePath.substring(remotePath.lastIndexOf("/") + 1);
        }
        return "";
    }

    /**
     * 切换工作目录
     * @param client ftp客户端
     * @param dir 工作目录
     * @return 切换成功返回true，否则返回false
     */
    private boolean changeDirectory(FTPClient client, String dir) {
        try {
            if (client == null || StringUtils.isBlank(dir)) {
                return false;
            }

            String fileBackslashSeparator = "\\";
            String fileSeparator = "/";

            if (StringUtils.contains(dir, fileBackslashSeparator)) {
                dir = StringUtils.replaceAll(dir, fileBackslashSeparator, fileSeparator);
            }

            String[] dirArray = StringUtils.split(dir, fileSeparator);

            String tmp = "";
            for (String aDirArray : dirArray) {
                tmp += fileSeparator + aDirArray;
                if (!client.changeWorkingDirectory(tmp)) {
                    // 创建工作目录
                    client.makeDirectory(tmp);
                    // 切换工作目录
                    client.changeWorkingDirectory(tmp);
                }
            }
            return true;
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("切换工作目录失败。");
        }
        return false;
    }

}

5、ftp一次连接处理上传下载

package com.scenetec.isv.utils.ftp.template;

import com.scenetec.isv.utils.ftp.core.FtpClientFactory;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.net.ftp.FTPClient;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author shendunyuan@scenetec.com
 * @date 2019/1/22
 */
@Slf4j
@Component
public class FtpOnceTemplate extends FtpBaseTemplate {

    @Resource
    private FtpClientFactory factory;

    /**
     * 上传文件
     *
     * @param inputStream 文件流
     * @param remotePath 远程文件，必须包含文件名
     * @return 上传成功返回true， 否则返回false
     */
    @Override
    public boolean uploadFile(InputStream inputStream, String remotePath) {
        // 上传
        FTPClient client = null;
        try {
            // 创建对象
            client = factory.create();
            // 上传
            return uploadHandle(client, inputStream, remotePath);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("上传文件异常。");
        } finally {
            factory.close(client);
        }
        return false;
    }

    /**
     * 下载文件
     * @param remotePath 远程文件，必须包含文件名
     * @param outputStream 本地文件流
     * @return 下载成功返回true，否则返回false
     */
    @Override
    public boolean downloadFile(String remotePath, OutputStream outputStream) {
        // 下载
        FTPClient client = null;
        try {
            // 获取对象
            client = factory.create();
            // 文件下载
            return downloadHandle(client, remotePath, outputStream);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("下载文件异常。");
        } finally {
            if (client != null) {
                factory.close(client);
            }
        }
        return false;
    }

    /**
     * 删除文件
     * @param remotePath 远程文件，必须包含文件名
     * @return 下载成功返回true，否则返回false
     */
    @Override
    public boolean deleFile(String remotePath) {
        FTPClient client = null;
        try {
            // 获取对象
            client = factory.create();
            // 删除文件
            return deleteHandle(client, remotePath);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("删除文件异常。");
        } finally {
            if (client != null) {
                factory.close(client);
            }
        }
        return false;
    }

}

6、ftp使用资源池处理上传下载

package com.scenetec.isv.utils.ftp.template;

import com.scenetec.isv.utils.ftp.core.FtpClientFactory;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.commons.pool2.impl.GenericObjectPool;
import org.springframework.stereotype.Component;

import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author shendunyuan@scenetec.com
 * @date 2018/12/20
 */
@Slf4j
@Component
public class FtpPoolTemplate extends FtpBaseTemplate {

    private GenericObjectPool<FTPClient> ftpClientPool;

    public FtpPoolTemplate(FtpClientFactory ftpClientFactory) {
        this.ftpClientPool = new GenericObjectPool<>(ftpClientFactory);
    }

    /**
     * 上传文件
     *
     * @param inputStream 文件流
     * @param remotePath 远程文件，必须包含文件名
     * @return 上传成功返回true， 否则返回false
     */
    @Override
    public boolean uploadFile(InputStream inputStream, String remotePath) {
        // 上传
        FTPClient client = null;
        try {
            // 从池中获取对象
            client = getFtpClient();
            // 上传
            return uploadHandle(client, inputStream, remotePath);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("上传文件异常。");
        } finally {
            // 将对象放回池中
            if (client != null) {
                ftpClientPool.returnObject(client);
            }
        }
        return false;
    }

    /**
     * 下载文件
     * @param remotePath 远程文件，必须包含文件名
     * @param outputStream 本地文件流
     * @return 下载成功返回true，否则返回false
     */
    @Override
    public boolean downloadFile(String remotePath, OutputStream outputStream) {
        // 下载
        FTPClient client = null;
        try {
            // 从池中获取对象
            client = getFtpClient();
            // 下载
            return downloadHandle(client, remotePath, outputStream);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("下载文件异常。");
        } finally {
            if (client != null) {
                ftpClientPool.returnObject(client);
            }
        }
        return false;
    }

    /**
     * 删除文件
     * @param remotePath 远程文件，必须包含文件名
     * @return 下载成功返回true，否则返回false
     */
    @Override
    public boolean deleFile(String remotePath) {
        FTPClient client = null;
        try {
            // 从池中获取对象
            client = getFtpClient();
            // 删除文件
            return deleteHandle(client, remotePath);
        } catch (Exception ex) {
            ex.printStackTrace();
            log.error("删除文件异常。");
        } finally {
            if (client != null) {
                ftpClientPool.returnObject(client);
            }
        }
        return false;
    }


    /**
     * 验证连接是否成功
     * @return 连接登录成功返回true，否则返回false
     */
    private FTPClient getFtpClient () {
        FTPClient client = null;
        try {
            while (true) {
                // 获取客户端
                client = ftpClientPool.borrowObject();
                // 验证客户端
                if (client == null) {
                    continue;
                } else {
                    if (!client.isConnected() || !FTPReply.isPositiveCompletion(client.getReplyCode())) {
                        ftpClientPool.invalidateObject(client);
                    } else {
                        break;
                    }
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return client;
    }

}

7、ftp部分依赖配置

<dependencies>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.7</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>commons-net</groupId>
            <artifactId>commons-net</artifactId>
            <version>3.3</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.8</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.5.0</version>
        </dependency>
    </dependencies>

8、ftp测试类

package com.scenetec.isv.operation.ftp;

import com.scenetec.isv.operation.ISVOperationManagerApplication;
import com.scenetec.isv.utils.ftp.template.FtpOnceTemplate;
import com.scenetec.isv.utils.ftp.template.FtpPoolTemplate;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;
import java.io.File;

/**
 * @author shendunyuan@scenetec.com
 * @date 2018/12/20
 */
@SpringBootTest(classes = ISVOperationManagerApplication.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@RunWith(SpringRunner.class)
public class FtpClientPoolTest {

    @Autowired
    private FtpPoolTemplate ftpPoolTemplate;
    @Resource
    private FtpOnceTemplate ftpOnceTemplate;

    private String localPath = "/Users/sdy/test/isv/platform.cer";
    private String localDownPath = "/Users/sdy/test/isv/2019/111test.cer";
    private String remotePath = "/2019/111.cer";

    @Test
    public void upload() {
        boolean bool = ftpPoolTemplate.uploadFile(localPath, remotePath);
        if (bool) {
            System.out.println("success");
        } else {
            System.out.println("failed");
        }
    }

    @Test
    public void up() {
        boolean bool = ftpOnceTemplate.uploadFile(localPath, remotePath);
        if (bool) {
            System.out.println("success");
        } else {
            System.out.println("failed");
        }
    }

    @Test
    public void uploadFile() {
        File file = new File(localPath);
        boolean bool = ftpPoolTemplate.uploadFile(file, remotePath);
        if (bool) {
            System.out.println("success");
        } else {
            System.out.println("failed");
        }
    }

    @Test
    public void downloadFile() {
        boolean bool = ftpPoolTemplate.downloadFile(remotePath, localDownPath);
        if (bool) {
            System.out.println("success");
        } else {
            System.out.println("failed");
        }
    }

    @Test
    public void deleteFile() {
        boolean bool = ftpPoolTemplate.deleteFile(remotePath);
        if (bool) {
            System.out.println("success");
        } else {
            System.out.println("failed");
        }
    }
}

注意：ftp多线程处理时容易超时，目前没有找到更好的处理办法。

完整项目代码请参见：https://github.com/sxpdy8571/ftpUtils/tree/develop