JAVA FTP 服务器文件的上传或者下载

直接上代码：

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.log4j.Logger;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.stream.Collectors;


public class FTPUtils {
    private FTPClient ftpClient;
    private String strIp;
    private int intPort;
    private String user;
    private String password;

    private static Logger logger = Logger.getLogger(FTPUtils.class.getName());


    public FTPUtils(String strIp, int intPort, String user, String Password) {
        this.strIp = strIp;
        this.intPort = intPort;
        this.user = user;
        this.password = Password;
        this.ftpClient = new FTPClient();
    }

    /**
     * @return 判断是否登入成功
     */
    public boolean ftpLogin() {
        boolean isLogin = false;
        FTPClientConfig ftpClientConfig = new FTPClientConfig();
        ftpClientConfig.setServerTimeZoneId(TimeZone.getDefault().getID());
        this.ftpClient.setControlEncoding("GBK");
        this.ftpClient.configure(ftpClientConfig);
        try {
            if (this.intPort > 0) {
                this.ftpClient.connect(this.strIp, this.intPort);
            } else {
                this.ftpClient.connect(this.strIp);
            }
            // FTP服务器连接回答
            int reply = this.ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                this.ftpClient.disconnect();
                logger.error("登录FTP服务失败！");
                return isLogin;
            }
            this.ftpClient.login(this.user, this.password);
            // 设置传输协议
            this.ftpClient.enterLocalPassiveMode();
            this.ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            logger.info("恭喜" + this.user + "成功登陆FTP服务器");
            isLogin = true;
        } catch (Exception e) {
            e.printStackTrace();
            logger.error(this.user + "登录FTP服务失败！" + e.getMessage());
        }
        this.ftpClient.setBufferSize(1024 * 2);
        this.ftpClient.setDataTimeout(30 * 1000);
        return isLogin;
    }

    /**
     * @退出关闭服务器链接
     */
    public void ftpLogOut() {
        if (null != this.ftpClient && this.ftpClient.isConnected()) {
            try {
                boolean reuslt = this.ftpClient.logout();// 退出FTP服务器
                if (reuslt) {
                    logger.info("成功退出服务器");
                }
            } catch (IOException e) {
                e.printStackTrace();
                logger.warn("退出FTP服务器异常！" + e.getMessage());
            } finally {
                try {
                    this.ftpClient.disconnect();// 关闭FTP服务器的连接
                } catch (IOException e) {
                    e.printStackTrace();
                    logger.warn("关闭FTP服务器的连接异常！");
                }
            }
        }
    }

    /***
     * 上传Ftp文件
     * @param localFile 当地文件
     * @param  - 应该以/结束
     * */
    public boolean uploadFile(File localFile, String remoteUpLoadPath) {
        BufferedInputStream inStream = null;
        boolean success = false;
        try {
            this.ftpClient.changeWorkingDirectory(remoteUpLoadPath);// 改变工作路径
            inStream = new BufferedInputStream(new FileInputStream(localFile));
            logger.info(localFile.getName() + "开始上传.....");
            success = this.ftpClient.storeFile(localFile.getName(), inStream);
            if (success == true) {
                logger.info(localFile.getName() + "上传成功");
                return success;
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            logger.error(localFile + "未找到");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inStream != null) {
                try {
                    inStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return success;
    }




    public void downloadFile(FTPFile file, String localDir,
                             String remoteDownLoadPath) {
        String strFilePath = localDir + file.getName();
        BufferedOutputStream outStream = null;
        boolean success = false;
        try {
            this.ftpClient.changeWorkingDirectory(remoteDownLoadPath);
            outStream = new BufferedOutputStream(new FileOutputStream(
                    strFilePath));
            success = this.ftpClient.retrieveFile(file.getName(), outStream);
            if (success == true) {
                logger.info(file.getName() + "--成功下载到--" + strFilePath);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (null != outStream) {
                try {
                    outStream.flush();
                    outStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        if (success == false) {
            logger.error(file.getName() + "下载失败!!!");
        }
    }

    /***
     * @上传文件夹
     * @param localDirectory
     *            当地文件夹
     * @param remoteDirectoryPath
     *            Ftp 服务器路径 以目录"/"结束
     * */
    public boolean uploadDirectory(String localDirectory,
                                   String remoteDirectoryPath) {
        File src = new File(localDirectory);
        try {
            remoteDirectoryPath = remoteDirectoryPath + src.getName() + "/";
            boolean makeDirFlag = this.ftpClient.makeDirectory(remoteDirectoryPath);
            System.out.println("localDirectory : " + localDirectory);
            System.out.println("remoteDirectoryPath : " + remoteDirectoryPath);
            System.out.println("src.getName() : " + src.getName());
            System.out.println("remoteDirectoryPath : " + remoteDirectoryPath);
            System.out.println("makeDirFlag : " + makeDirFlag);
            // ftpClient.listDirectories();
        } catch (IOException e) {
            e.printStackTrace();
            logger.info(remoteDirectoryPath + "目录创建失败");
        }
        File[] allFile = src.listFiles();
        for (int currentFile = 0; currentFile < allFile.length; currentFile++) {
            if (!allFile[currentFile].isDirectory()) {
                String srcName = allFile[currentFile].getPath().toString();
                uploadFile(new File(srcName), remoteDirectoryPath);
            }
        }
        for (int currentFile = 0; currentFile < allFile.length; currentFile++) {
            if (allFile[currentFile].isDirectory()) {
                // 递归
                uploadDirectory(allFile[currentFile].getPath().toString(),
                        remoteDirectoryPath);
            }
        }
        return true;
    }

    public boolean isDirectory(String a) {
        if ("..".equals(a)) {
            return false;
        } else if (".".equals(a)) {
            return false;
        } else return true;
    }

    public int getFileListLength(String remoteDirectory) throws IOException {
        FTPFile[] allFile = this.ftpClient.listFiles(remoteDirectory);
        List<FTPFile> list = Arrays.stream(allFile).filter(
                file -> isDirectory(file.getName())).collect(Collectors.toList());
        for (FTPFile file :
                list) {
            logger.info(file.getName() + "---" + file.getType());
            logger.info("..".equals(file.getName()));
        }
        return list.size();
    }

    /***
     * @下载文件夹
     * @param
     * @param remoteDirectory 远程文件夹
     * */
    public boolean downLoadDirectory(String localDirectoryPath, String remoteDirectory) {
        try {
            String fileName = new File(remoteDirectory).getName();
            localDirectoryPath = localDirectoryPath + fileName + "\\";
            new File(localDirectoryPath).mkdirs();
            FTPFile[] allFile = this.ftpClient.listFiles(remoteDirectory);
            logger.info("总文件的个数" + allFile.length);
            for (FTPFile file : allFile) {
                logger.info(file.getName() + "---" + file.getType());

            }
            List<FTPFile> list = Arrays.stream(allFile).filter(
                    file -> isDirectory(file.getName())).collect(Collectors.toList());
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            Calendar calendar=Calendar.getInstance();
            calendar.setTime(new Date());
            calendar.add(Calendar.DATE,-1);
            for (FTPFile file : list) {
                if (!file.isDirectory()) {
                    if (!sdf.format(calendar.getTime()).equals(file.getName().substring(15, 23))) continue;
                    downloadFile(file, localDirectoryPath, remoteDirectory);
                }
            }
            for (FTPFile file : list) {
                if (file.isDirectory()) {
                    String strremoteDirectoryPath = remoteDirectory + "\\" + file.getName();
                    downLoadDirectory(localDirectoryPath, strremoteDirectoryPath);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
            logger.info("下载文件夹失败");
            return false;
        }
        return true;
    }

    // FtpClient的Set 和 Get 函数
    public FTPClient getFtpClient() {
        return ftpClient;
    }

    public void setFtpClient(FTPClient ftpClient) {
        this.ftpClient = ftpClient;
    }


}