几种不同的FTP下载方式

package com.downupload;

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.FTPClientConfig;
import org.apache.poi.util.IOUtils;

/**
* Apache commons-net 试用一把,看看FTP客户端工具做的好用不
*
* Standard:
*/
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 {
         //下面三行代码必须要,而且不能改变编码格式,否则不能正确下载中文文件
         FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
         conf.setServerLanguageCode("zh");
         ftpClient.setControlEncoding("GBK");
            ftpClient.connect("10.0.4.90");
            ftpClient.login("user", "user123");

            File srcFile = new File("D:\\资料文档\\颜色大全.docx");
            fis = new FileInputStream(srcFile);
            //设置上传目录
            ftpClient.changeWorkingDirectory("/");
            ftpClient.setBufferSize(1024);
            ftpClient.setControlEncoding("GBK");
            //设置文件类型(二进制)
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.storeFile("士大夫似的.docx", fis);
            System.out.println("上传完成!!");
        } 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;
//        ftp://10.0.1.80:2121/
//        ftpuser: sf12345678
        try {
         //下面三行代码必须要,而且不能改变编码格式,否则不能正确下载中文文件,文件读取不了,需要在connect前面设置
         FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
         conf.setServerLanguageCode("zh");
         ftpClient.setControlEncoding("GBK");
            ftpClient.connect("10.0.1.80");
            ftpClient.login("ftpuser", "234234");
//            01\\E_File12\\2010917\\{E40B9575-1B1C-4125-BEF7-9DE18F6C5FB9}.tif
            String remoteFileName = "01/E_File12/20101211/{41789A05-CA00-4343-96A4-678E1F17C299}.xls";
            fos = new FileOutputStream("d:/爱上.xls");

            ftpClient.setBufferSize(1024);
            //设置文件类型(二进制)
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.retrieveFile(remoteFileName, fos);
            System.out.println("下载完成!!");
        } 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);
            }
        }
        System.out.println("oooooooooooooooooooooooooooooooooooooooooooooooooooooooooo");
    }
}

 

 

package com.downupload;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;


//1、加上以下三句即可解决
//
//ftpClient.setControlEncoding(“GBK”);
//
//FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
//conf.setServerLanguageCode("zh");
//解答:经过测试,根本上行不通,上述问题依然存在
//
//2、与上述方式有所类似,但我觉得这种方式更靠谱一点
//
//首先,加上ftpClient.setControlEncoding(“GBK”);这一句,然后,将所有的中文进行转码为“ISO-8859-1”格式,如下:
//
//ftpClient.changeWorkingDirectory(new String(remotePath.getBytes("GBK"),"iso-8859-1"));
//
//解答:经过测试,仍然行不通,之所以我说此方式更靠谱一点,请继续往下看
//
//首先我们来说说为什么要进行转码:
//
//因为在FTP协议里面,规定文件名编码为iso-8859-1,所以目录名或文件名需要转码。
//
//接下来的问题是,我们应该将什么编码转换为此格式。因此,就有了第二种解决方案——把 GBK格式的转换为ISO-8859-1格式。而且,有的人还说,必须得这么转。其实,之所以他们能这么说,我觉得完全是巧合。它的真正原理是,既然 FTP协议规定的编码格式是“ISO-8859-1”,那么我们确实得将格式转换一下,然后等服务器收到文件时再自动转换为系统自带的编码格式,因此,关键不是规定为什么格式,而是取决于FTP服务器的编码格式。因此,如果FTP系统的编码格式为“GBK”时,第二种方式肯定会成功;但是,如果系统的编码格式为“UTF-8”时,那就会仍然出现乱码啦。所以,我们只能通过代码先获取系统的编码格式,然后通过此编码格式转换为ISO-8859-1的编码格式。获取方式如下:
//
//private static String encoding = System.getProperty("file.encoding");

public class FtpApache {
    private static FTPClient ftpClient = new FTPClient();
    private static String encoding = System.getProperty("file.encoding");
    /**
     * Description: 向FTP服务器上传文件
     *
     * @Version1.0
     * @param url
     *            FTP服务器hostname
     * @param port
     *            FTP服务器端口
     * @param username
     *            FTP登录账号
     * @param password
     *            FTP登录密码
     * @param path
     *            FTP服务器保存目录,如果是根目录则为“/”
     * @param filename
     *            上传到FTP服务器上的文件名
     * @param input
     *            本地文件输入流
     * @return 成功返回true,否则返回false
     */
    public static boolean uploadFile(String url, int port, String username,
            String password, String path, String filename, InputStream input) {
        boolean result = false;

        try {
            int reply;
            // 如果采用默认端口,可以使用ftp.connect(url)的方式直接连接FTP服务器
            ftpClient.connect(url);
            // ftp.connect(url, port);// 连接FTP服务器
            // 登录
            ftpClient.login(username, password);
            ftpClient.setControlEncoding(encoding);
            // 检验是否连接成功
            reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                System.out.println("连接失败");
                ftpClient.disconnect();
                return result;
            }

            // 转移工作目录至指定目录下
            boolean change = ftpClient.changeWorkingDirectory(path);
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
            if (change) {
                result = ftpClient.storeFile(new String(filename.getBytes(encoding),"iso-8859-1"), input);
                if (result) {
                    System.out.println("上传成功!");
                }
            }
            input.close();
            ftpClient.logout();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    ftpClient.disconnect();
                } catch (IOException ioe) {
                }
            }
        }
        return result;
    }

    /**
     * 将本地文件上传到FTP服务器上
     *
     */
    public void testUpLoadFromDisk() {
        try {
            FileInputStream in = new FileInputStream(new File("E:/号码.txt"));
            boolean flag = uploadFile("127.0.0.1", 21, "zlb","123", "/", "哈哈.txt", in);
            System.out.println(flag);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }


    /**
     * Description: 从FTP服务器下载文件
     *
     * @Version1.0
     * @param url
     *            FTP服务器hostname
     * @param port
     *            FTP服务器端口
     * @param username
     *            FTP登录账号
     * @param password
     *            FTP登录密码
     * @param remotePath
     *            FTP服务器上的相对路径
     * @param fileName
     *            要下载的文件名
     * @param localPath
     *            下载后保存到本地的路径
     * @return
     */
    public static boolean downFile(String url, int port, String username,
            String password, String remotePath, String fileName,
            String localPath) {
        boolean result = false;
        try {
            int reply;
            ftpClient.setControlEncoding(encoding);
           
            /*
             *  为了上传和下载中文文件,有些地方建议使用以下两句代替
             *  new String(remotePath.getBytes(encoding),"iso-8859-1")转码。
             *  经过测试,通不过。
             */
//            FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
//            conf.setServerLanguageCode("zh");

            ftpClient.connect(url, port);
            // 如果采用默认端口,可以使用ftp.connect(url)的方式直接连接FTP服务器
            ftpClient.login(username, password);// 登录
            // 设置文件传输类型为二进制
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            // 获取ftp登录应答代码
            reply = ftpClient.getReplyCode();
            // 验证是否登陆成功
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                System.err.println("FTP server refused connection.");
                return result;
            }
            // 转移到FTP服务器目录至指定的目录下
            ftpClient.changeWorkingDirectory(new String(remotePath.getBytes(encoding),"iso-8859-1"));
            // 获取文件列表
            FTPFile[] fs = ftpClient.listFiles();
            for (FTPFile ff : fs) {
                if (ff.getName().equals(fileName)) {
                    File localFile = new File(localPath + "/" + ff.getName());
                    OutputStream is = new FileOutputStream(localFile);
                    ftpClient.retrieveFile(ff.getName(), is);
                    is.close();
                }
            }

            ftpClient.logout();
            result = true;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    ftpClient.disconnect();
                } catch (IOException ioe) {
                }
            }
        }
        return result;
    }

    /**
     * 将FTP服务器上文件下载到本地
     *
     */
    public void testDownFile() {
        try {
            boolean flag = downFile("127.0.0.1", 21, "zlb",
                    "123", "/", "哈哈.txt", "D:/");
            System.out.println(flag);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
   
    public static void main(String[] args) {
     FtpApache fa = new FtpApache();
        fa.testDownFile();
    }
}

 

 

 

 

 

package com.downupload;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import sun.net.TelnetInputStream;
import sun.net.TelnetOutputStream;
import sun.net.ftp.FtpClient;

/**
 * Java自带的API对FTP的操作
 * @Title:Ftp.java
 * @author:  
 */
public class Ftp {
    /**
     * 本地文件名
     */
    private String localfilename;
    /**
     * 远程文件名
     */
    private String remotefilename;
    /**
     * 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
     * @author
     * @date   2012-7-11
     */
    public void connectServer(String ip, int port, String user,
            String password, String path) {
        try {
            /* ******连接服务器的两种方法*******/
            //第一种方法
            ftpClient = new FtpClient();
            ftpClient.openServer(ip, port);
            //第二种方法
            ftpClient = new FtpClient(ip);
           
            ftpClient.login(user, password);
            // 设置成2进制传输
            ftpClient.binary();
            System.out.println("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
                ftpClient.cd(path);
            }
            ftpClient.binary();
        } catch (IOException ex) {
            ex.printStackTrace();
            throw new RuntimeException(ex);
        }
    }
    /**
     * 关闭连接
     * @author
     * @date   2012-7-11
     */
    public void closeConnect() {
        try {
            ftpClient.closeServer();
            System.out.println("disconnect success");
        } catch (IOException ex) {
            System.out.println("not disconnect");
            ex.printStackTrace();
            throw new RuntimeException(ex);
        }
    }
    /**
     * 上传文件
     * @param localFile 本地文件
     * @param remoteFile 远程文件
     * @author
     * @date   2012-7-11
     */
    public void upload(String localFile, String remoteFile) {
        this.localfilename = localFile;
        this.remotefilename = remoteFile;
        TelnetOutputStream os = null;
        FileInputStream is = null;
        try {
            //将远程文件加入输出流中
            os = ftpClient.put(this.remotefilename);
            //获取本地文件的输入流
            File file_in = new File(this.localfilename);
            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)
     * @author
     * @date   2012-7-11
     */
    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();
                }
            }
        }
    }

    public static void main(String agrs[]) {

        String filepath[] = { "/temp/aa.txt", "/temp/regist.log"};
        String localfilepath[] = { "C:\\tmp\\1.txt","C:\\tmp\\2.log"};

        Ftp fu = new Ftp();
        /*
         * 使用默认的端口号、用户名、密码以及根目录连接FTP服务器
         */
        fu.connectServer("127.0.0.1", 22, "anonymous", "IEUser@", "/temp");
       
        //下载
        for (int i = 0; i < filepath.length; i++) {
            fu.download(filepath[i], localfilepath[i]);
        }
                String localfile = "E:\\号码.txt";
        String remotefile = "/temp/哈哈.txt";
        //上传
        fu.upload(localfile, remotefile);
        fu.closeConnect();

       System.out.println("呵呵呵呵呵呵呵呵呵呵呵呵呵呵");

       System.out.println("123456798=======================123123123123123123123");

    }
}

 

 

 

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