java通過ftp上傳、下載文件，遍歷文件目錄

import java.io.DataInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

 

import org.apache.catalina.tribes.util.Logs;

 

import sun.net.TelnetInputStream;

import sun.net.TelnetOutputStream;

import sun.net.ftp.FtpClient;

 

public class DownFileForFtp {

    FtpClient ftpClient;

    private String server = "ip";

    private int port = 21;

    private String userName = "usn";

    private String userPassword = "pwd";

 

    /**

     * 鏈接到服務器

     *

     * @return

     */

    public boolean open() {

        if (ftpClient != null && ftpClient.serverIsOpen())

            return true;

        try {

            ftpClient = new FtpClient();

            ftpClient.openServer(server, port);

            ftpClient.login(userName, userPassword);

            ftpClient.binary();

            return true;

        } catch (Exception e) {

            e.printStackTrace();

            ftpClient = null;

            return false;

        }

    }

 

    public boolean cd(String dir) {

        boolean f = false;

        try {

            ftpClient.cd(dir);

        } catch (IOException e) {

            //Logs.error(e.toString());

            return f;

        }

        return true;

    }

 

    /**

     * 上傳文件到FTP服務器

     *

     * @param localPathAndFileName

     *            本地文件目錄和文件名

     * @param ftpFileName

     *            上傳後的文件名

     * @param ftpDirectory

     *            FTP目錄如:/path1/pathb2/,如果目錄不存在回自動創建目錄

     * @throws Exception

     */

    public boolean upload(String localDirectoryAndFileName, String ftpFileName,

            String ftpDirectory) throws Exception {

        if (!open())

            return false;

        FileInputStream is = null;

        TelnetOutputStream os = null;

        try {

            char ch = ' ';

            if (ftpDirectory.length() > 0)

                ch = ftpDirectory.charAt(ftpDirectory.length() - 1);

            for (; ch == '/' || ch == '\\'; ch = ftpDirectory

                    .charAt(ftpDirectory.length() - 1))

                ftpDirectory = ftpDirectory.substring(0,

                        ftpDirectory.length() - 1);

 

            int slashIndex = ftpDirectory.indexOf(47);

            int backslashIndex = ftpDirectory.indexOf(92);

            int index = slashIndex;

            String dirall = ftpDirectory;

            if (backslashIndex != -1 && (index == -1 || index > backslashIndex))

                index = backslashIndex;

            String directory = "";

            while (index != -1) {

                if (index > 0) {

                    String dir = dirall.substring(0, index);

                    directory = directory + "/" + dir;

                    ftpClient.sendServer("XMKD " + directory + "\r\n");

                    ftpClient.readServerResponse();

                }

                dirall = dirall.substring(index + 1);

                slashIndex = dirall.indexOf(47);

                backslashIndex = dirall.indexOf(92);

                index = slashIndex;

                if (backslashIndex != -1

                        && (index == -1 || index > backslashIndex))

                    index = backslashIndex;

            }

            ftpClient.sendServer("XMKD " + ftpDirectory + "\r\n");

            ftpClient.readServerResponse();

 

            os = ftpClient.put(ftpDirectory + "/" + ftpFileName);

            File file_in = new File(localDirectoryAndFileName);

            is = new FileInputStream(file_in);

            byte bytes[] = new byte[1024];

            int i;

            while ((i = is.read(bytes)) != -1)

                os.write(bytes, 0, i);

            // 清理垃圾

 

            return true;

        } catch (Exception e) {

            e.printStackTrace();

            return false;

        } finally {

            if (is != null)

                is.close();

            if (os != null)

                os.close();

        }

    }

 

    /**

     * 從FTP服務器上下載文件並返回下載文件長度

     *

     * @param ftpDirectoryAndFileName

     * @param localDirectoryAndFileName

     * @return

     * @throws Exception

     */

    public long download(String ftpDirectoryAndFileName,

            String localDirectoryAndFileName) throws Exception {

        long result = 0;

        if (!open())

            return result;

        TelnetInputStream is = null;

        FileOutputStream os = null;

        try {

            is = ftpClient.get(ftpDirectoryAndFileName);

            java.io.File outfile = new java.io.File(localDirectoryAndFileName);

            os = new FileOutputStream(outfile);

            byte[] bytes = new byte[1024];

            int c;

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

                os.write(bytes, 0, c);

                result = result + c;

            }

        } catch (Exception e) {

            throw e;

        } finally {

            if (is != null)

                is.close();

            if (os != null)

                os.close();

 

        }

        return result;

    }

 

    /**

     * 返回FTP目錄下的文件列表

     *

     * @param ftpDirectory

     * @return

     */

    public List<String> getFileNameList(String ftpDirectory) {

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

        if (!open())

            return list;

        try {

            DataInputStream dis = new DataInputStream(

                    ftpClient.nameList(ftpDirectory));

            String filename = "";

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

                list.add(filename);

                System.out.println(filename);

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

        return list;

    }

 

    /**

     * 刪除FTP上的文件

     *

     * @param ftpDirAndFileName

     */

    public boolean deleteFile(String ftpDirAndFileName) {

        if (!open())

            return false;

        ftpClient.sendServer("DELE " + ftpDirAndFileName + "\r\n");

        return true;

    }

 

    /**

     * 刪除FTP目錄

     *

     * @param ftpDirectory

     */

    public boolean deleteDirectory(String ftpDirectory) {

        if (!open())

            return false;

        ftpClient.sendServer("XRMD " + ftpDirectory + "\r\n");

        return true;

    }

 

    /**

     * 關閉鏈接

     */

    public void close() {

        try {

            if (ftpClient != null && ftpClient.serverIsOpen())

                ftpClient.closeServer();

        } catch (Exception e) {

 

        }

    }

     

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

        DownFileForFtp df = new DownFileForFtp();

        df.getFileNameList("E:\\uploadfiles\\cat");

        df.download("E:\\uploadfiles\\cat\\2012-03-29.11.00.00.012.xml", "F:\\temp\\ftpdown\\2012-03-29.11.00.00.012.xml");

 

    }

     

}