Java实现FTP上传下载功能

http://lavasoft.blog.51cto.com/62575/93883/

 

Java FTP客户端工具包很多，在此我选用的Apache的FTPClient。这个包的获取可以通过 [url]http://commons.apache.org/net/[/url]来获取，我使用的是最新的commons-net-1.4.1.zip。其中包含了众多的java网络编程的工具包，官方文档列举如下：
    支持网络协议如下: 
        FTP 
        NNTP 
        SMTP 
        POP3 
        Telnet 
        TFTP 
        Finger 
        Whois 
        rexec/rcmd/rlogin 
        Time (rdate) and Daytime 
        Echo 
        Discard 
        NTP/SNTP

都很有用。在此我用到的是FTP相关的一些包。

public class FtpTest { 

    public static void main(String[] args) { 

        testUpload(); 

        testDownload(); 

    } 



    /** 

     * FTP上传单个文件测试 

     */ 

    public static void testUpload() { 

        FTPClient ftpClient = new FTPClient(); 

        FileInputStream fis = null; 



        try { 

            ftpClient.connect("192.168.14.117"); 

            ftpClient.login("admin", "123"); 



            File srcFile = new File("C:\\new.gif"); 

            fis = new FileInputStream(srcFile); 

            //设置上传目录 

            ftpClient.changeWorkingDirectory("/admin/pic"); 

            ftpClient.setBufferSize(1024); 

            ftpClient.setControlEncoding("GBK"); 

            //设置文件类型（二进制） 

            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); 

            ftpClient.storeFile("3.gif", fis); 

        } catch (IOException e) { 

            e.printStackTrace(); 

            throw new RuntimeException("FTP客户端出错！", e); 

        } finally { 

            IOUtils.closeQuietly(fis); 

            try { 

                ftpClient.disconnect(); 

            } catch (IOException e) { 

                e.printStackTrace(); 

                throw new RuntimeException("关闭FTP连接发生异常！", e); 

            } 

        } 

    } 



    /** 

     * FTP下载单个文件测试 

     */ 

    public static void testDownload() { 

        FTPClient ftpClient = new FTPClient(); 

        FileOutputStream fos = null; 



        try { 

            ftpClient.connect("192.168.14.117"); 

            ftpClient.login("admin", "123"); 



            String remoteFileName = "/admin/pic/3.gif"; 

            fos = new FileOutputStream("c:/down.gif"); 



            ftpClient.setBufferSize(1024); 

            //设置文件类型（二进制） 

            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); 

            ftpClient.retrieveFile(remoteFileName, fos); 

        } catch (IOException e) { 

            e.printStackTrace(); 

            throw new RuntimeException("FTP客户端出错！", e); 

        } finally { 

            IOUtils.closeQuietly(fos); 

            try { 

                ftpClient.disconnect(); 

            } catch (IOException e) { 

                e.printStackTrace(); 

                throw new RuntimeException("关闭FTP连接发生异常！", e); 

            } 

        } 

    } 

} 

 

public class Ftp {

    private static final Logger logger = Logger.getLogger(FTP.class);

    /**

     * FTP客户端

     */

    private FtpClient ftpClient;



    /**

     * 服务器连接

     * 

     * @param ip

     *            服务器IP

     * @param port

     *            服务器端口

     * @param user

     *            用户名

     * @param password

     *            密码

     * @param path

     *            服务器路径

     * @throws IOException

     * 

     */

    public void connectServer(String ip, int port, String user, String password, String path) throws IOException {

        try {

            System.out.println("ftp connect...");

            ftpClient = new FtpClient(ip);

            ftpClient.login(user, password);

            // 设置成2进制传输

            ftpClient.binary();

            System.out.println("ftp login success!");

            if (path.length() != 0) {

                // 把远程系统上的目录切换到参数path所指定的目录

                try {

                    ftpClient.cd(path);

                } catch (Exception e) {

                    throw new IOException("FTP server: 550 CWD failed 远程目录未响应", e);

                }

            }

            ftpClient.binary();

        } catch (IOException e) {

            logger.error("ftp connect err!");

            logger.error(e.getMessage());

            e.printStackTrace();

            throw new IOException(e.getMessage());

        }

    }



    /**

     * 关闭连接

     * 

     * 

     */

    public void closeConnect() {

        try {

            ftpClient.closeServer();

            System.out.println("closeConnect success");

        } catch (IOException ex) {

            System.out.println("not closeConnect");

            ex.printStackTrace();

            throw new RuntimeException(ex);

        }

    }



    /**

     * 上传文件

     * 

     * @param localFile

     *            本地文件

     * @param remoteFile

     *            远程文件

     * 

     */

    public void upload(String localFile, String remoteFile) {

        TelnetOutputStream os = null;

        FileInputStream is = null;

        try {

            // 将远程文件加入输出流中

            os = ftpClient.put(remoteFile);

            // 获取本地文件的输入流

            File file_in = new File(localFile);

            is = new FileInputStream(file_in);

            // 创建一个缓冲区

            byte[] bytes = new byte[1024];

            int c;

            while ((c = is.read(bytes)) != -1) {

                os.write(bytes, 0, c);

            }

            System.out.println("upload success");

        } catch (IOException ex) {

            System.out.println("not upload");

            ex.printStackTrace();

            throw new RuntimeException(ex);

        } finally {

            try {

                if (is != null) {

                    is.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            } finally {

                try {

                    if (os != null) {

                        os.close();

                    }

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }



    /**

     * 下载文件

     * 

     * @param remoteFile

     *            远程文件路径(服务器端)

     * @param localFile

     *            本地文件路径(客户端)

     * 

     */

    public void download(String remoteFile, String localFile) {

        TelnetInputStream is = null;

        FileOutputStream os = null;

        try {



            // 获取远程机器上的文件filename，借助TelnetInputStream把该文件传送到本地。

            is = ftpClient.get(remoteFile);

            File file_in = new File(localFile);

            os = new FileOutputStream(file_in);

            byte[] bytes = new byte[1024];

            int c;

            while ((c = is.read(bytes)) != -1) {

                os.write(bytes, 0, c);

            }

            System.out.println("download success");

        } catch (IOException ex) {

            System.out.println("not download");

            ex.printStackTrace();

            throw new RuntimeException(ex);

        } finally {

            try {

                if (is != null) {

                    is.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            } finally {

                try {

                    if (os != null) {

                        os.close();

                    }

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }



    /**

     * 返回FTP目录下的文件列表

     * 

     * @param ftpDirectory

     * @return

     */

    public List<String> getFileNameList(String ftpDirectory) {

        List<String> list = new ArrayList<String>();

        BufferedReader bf = null;

        InputStreamReader isr = null;

        DataInputStream ds = null;

        try {

            ds = new DataInputStream(ftpClient.nameList(ftpDirectory));

            isr = new InputStreamReader(ds);

            bf = new BufferedReader(isr);

            String filename = "";

            while ((filename = bf.readLine()) != null) {

                list.add(filename);

            }

        } catch (Exception e) {

            e.printStackTrace();

        } finally {

            try {

                ds.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                isr.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                bf.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        return list;

    }



    public static void main(String agrs[]) throws Exception {



        Ftp ftp = new Ftp();

        ftp.connectServer("192.168.1.221", 21, "admin", "123@123", "/FTP Files/temp");



        List<String> list = ftp.getFileNameList("/FTP Files/temp");

        for (String str : list) {

            try {

                Calendar cal = Calendar.getInstance();// 使用日历类

                int year = cal.get(Calendar.YEAR);// 得到年

                int month = cal.get(Calendar.MONTH) + 1;// 得到月，因为从0开始的，所以要加1

                int day = cal.get(Calendar.DAY_OF_MONTH);// 得到天

                String fileName = "WiMAX_" + year + month + day;

                System.out.println("str" + str + "---------" + "fileName:" + fileName);



                String regEx = "WiMAX_\\d{8}_\\d{5}_\\s{5}"; // 表示a或F

                Pattern pat = Pattern.compile(regEx);

                System.out.println(pat.matcher(str).find());



                // if (str.contains(fileName)) {

                // fu.download("/FTP Files/temp/" + str, "d:/temp/" + str);

                // System.out.println("download:" + str);

                // }



            } catch (Exception e) {

                e.printStackTrace();

                logger.error(e.getMessage());

                throw e;

            }

        }





        ftp.closeConnect();

    }

}

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