ftp上傳和下載文件的java實現

最近一個項目需要去ftp上下載文件，遇到一個問題是沒有用戶名和密碼，後來才發現ftp原來可以匿名登錄，而且還要聲明一下自己是匿名的，空字符串都登陸不上去的，一下是我的代碼，是匿名登錄的。

package ftp2;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.SocketException;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
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;

/**
 * 使用commons的net包進行ftp鏈接. 相關包：commons-net-1.4.1.jar ;
 * commons-io-1.2.jar;jakarta-oro-2.0.8.jar測試通過.可以列出ftp上的文件
 * 通過把ftp服務器上的文件流連接到outSteam及可以把文件下載到本機的目錄..限制如果目錄爲中文則需要處理.最好使用英文文件名
 *
 */
public class ListFtpFile {

    private FTPClient ftpClient = new FTPClient();

    private OutputStream outSteam = null;

    /**
     * ftp服務器地址
     */
    private String hostName = "192.168.0.2";
    private int port = 212;

    /**
     * 登錄名
     */
    private String userName = "anonymous";//匿名登錄，空字符串不行

    /**
     * 登錄密碼
     */
    private String password = "[email protected]";//隨便一個地址，我胡亂寫一個也可以運行的

    /**
     * 需要訪問的遠程目錄
     */
    private String remoteDir = "/software/dreamweaver/";

    /**
     * 下載
     */
    private void download() {
        try {
            // 鏈接到ftp服務器
            ftpClient.connect(hostName,port);
            System.out.println("連接到ftp服務器：" + hostName + " 成功..開始登錄");
            // 登錄.用戶名 密碼
            boolean b = ftpClient.login(userName, password);
            System.out.println("登錄成功." + b);

//          檢測連接是否成功
            int reply = ftpClient.getReplyCode();
            if(!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                System.err.println("FTP server refused connection.");
                System.exit(1);
            }

            ftpClient.setControlEncoding("GBK");
            FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
            conf.setServerLanguageCode("zh");
            FTPFile[] remoteFiles = ftpClient.listFiles(remoteDir);
            if (remoteFiles != null) {
                for (int i = 0; i < remoteFiles.length; i++) {
                    String name = remoteFiles[i].getName();

                    //下載
                    File localFile = new File("c:/001/ftp/" + name);
                    OutputStream is = new FileOutputStream(localFile);
                    //retrieveFile的第一個參數需要是 ISO-8859-1 編碼,並且必須是完整路徑！
                    String fileName = remoteDir + name;
                    ftpClient.retrieveFile(new String(fileName.getBytes("GBK"),"ISO-8859-1"), is);
                    is.close();

                    //打印
                    long length = remoteFiles[i].getSize();
                    String readableLength = FileUtils.byteCountToDisplaySize(length);
                    System.out.println(name + ":\t"+remoteFiles[i].isFile()+"\t" + readableLength);

                }
            }


            ftpClient.logout();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(outSteam);
            try {
                ftpClient.disconnect();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }

    /**
     * 上傳
     * */
    public void upload(){
        String srcUrl = "C:/001/菜單權限設計.doc";
        String targetFileName = "菜單權限設計.doc";
        try {
            ftpClient.connect(hostName,port);
            boolean b = ftpClient.login(userName, password);
            // 檢測連接是否成功
            int reply = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(reply)) {
                ftpClient.disconnect();
                System.err.println("FTP server refused connection.");
                System.exit(1);
            }

            ftpClient.setControlEncoding("GBK");
            FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
            conf.setServerLanguageCode("zh");

            File srcFile = new File(srcUrl);
            FileInputStream fis = null;
            fis = new FileInputStream(srcFile);

            // 設置上傳目錄
            ftpClient.changeWorkingDirectory(remoteDir);
            ftpClient.setBufferSize(1024);
            ftpClient.setControlEncoding("GBK");

            // 設置文件類型（二進制）
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            // 上傳
            b = ftpClient.storeFile(targetFileName, fis);
            IOUtils.closeQuietly(fis);

            /*boolean bool = ftpClient.changeWorkingDirectory("/NC");
            System.out.println("changeWorkingDirectory="+bool);
            bool = ftpClient.makeDirectory("/NC");
            System.out.println("makeDirectory="+bool);*/

            ftpClient.logout();
        } catch (SocketException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try {
                ftpClient.disconnect();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

    /**
     * 測試
     * */
    public static void main(String[] args) {
        ListFtpFile listFtpfiles = new ListFtpFile();
        listFtpfiles.download();
        listFtpfiles.upload();
    }
}

package ftp2;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.SocketException;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
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;

/**
 * 使用commons的net包進行ftp鏈接. 相關包：commons-net-1.4.1.jar ;
 * commons-io-1.2.jar;jakarta-oro-2.0.8.jar測試通過.可以列出ftp上的文件
 * 通過把ftp服務器上的文件流連接到outSteam及可以把文件下載到本機的目錄..限制如果目錄爲中文則需要處理.最好使用英文文件名
 * 
 */
public class ListFtpFile {

	private FTPClient ftpClient = new FTPClient();

	private OutputStream outSteam = null;

	/**
	 * ftp服務器地址
	 */
	private String hostName = "192.168.0.2";
	private int port = 212;

	/**
	 * 登錄名
	 */
	private String userName = "anonymous";//匿名登錄，空字符串不行

	/**
	 * 登錄密碼
	 */
	private String password = "[email protected]";//隨便一個地址，我胡亂寫一個也可以運行的

	/**
	 * 需要訪問的遠程目錄
	 */
	private String remoteDir = "/software/dreamweaver/";

	/**
	 * 下載
	 */
	private void download() {
		try {
			// 鏈接到ftp服務器
			ftpClient.connect(hostName,port);
			System.out.println("連接到ftp服務器：" + hostName + " 成功..開始登錄");
			// 登錄.用戶名 密碼
			boolean b = ftpClient.login(userName, password);
			System.out.println("登錄成功." + b);
			
//			檢測連接是否成功
			int reply = ftpClient.getReplyCode();
			if(!FTPReply.isPositiveCompletion(reply)) {
				ftpClient.disconnect();
				System.err.println("FTP server refused connection.");
				System.exit(1);
			}
			
			ftpClient.setControlEncoding("GBK");
			FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);  
			conf.setServerLanguageCode("zh"); 
			FTPFile[] remoteFiles = ftpClient.listFiles(remoteDir);
			if (remoteFiles != null) {
				for (int i = 0; i < remoteFiles.length; i++) {
					String name = remoteFiles[i].getName();
					
					//下載
					File localFile = new File("c:/001/ftp/" + name);
					OutputStream is = new FileOutputStream(localFile);
					//retrieveFile的第一個參數需要是 ISO-8859-1 編碼,並且必須是完整路徑！
					String fileName = remoteDir + name;
					ftpClient.retrieveFile(new String(fileName.getBytes("GBK"),"ISO-8859-1"), is);
					is.close();
					
					//打印
					long length = remoteFiles[i].getSize();
					String readableLength = FileUtils.byteCountToDisplaySize(length);
					System.out.println(name + ":\t"+remoteFiles[i].isFile()+"\t" + readableLength);
					
				}
			}
			

			ftpClient.logout();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			IOUtils.closeQuietly(outSteam);
			try {
				ftpClient.disconnect();
			} catch (IOException ioe) {
				ioe.printStackTrace();
			}
		}
	}
	
	/**
	 * 上傳
	 * */
	public void upload(){
		String srcUrl = "C:/001/菜單權限設計.doc";
		String targetFileName = "菜單權限設計.doc";
		try {
			ftpClient.connect(hostName,port);
			boolean b = ftpClient.login(userName, password);
			// 檢測連接是否成功
			int reply = ftpClient.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				ftpClient.disconnect();
				System.err.println("FTP server refused connection.");
				System.exit(1);
			}
			
			ftpClient.setControlEncoding("GBK");
			FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);  
			conf.setServerLanguageCode("zh"); 
			
			File srcFile = new File(srcUrl);
			FileInputStream fis = null;
			fis = new FileInputStream(srcFile);

			// 設置上傳目錄
			ftpClient.changeWorkingDirectory(remoteDir);
			ftpClient.setBufferSize(1024);
			ftpClient.setControlEncoding("GBK");

			// 設置文件類型（二進制）
			ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
			// 上傳
			b = ftpClient.storeFile(targetFileName, fis);
			IOUtils.closeQuietly(fis);
			
			/*boolean bool = ftpClient.changeWorkingDirectory("/NC");
			System.out.println("changeWorkingDirectory="+bool);
			bool = ftpClient.makeDirectory("/NC");
			System.out.println("makeDirectory="+bool);*/
			
			ftpClient.logout();
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
	}

	/**
	 * 測試
	 * */
	public static void main(String[] args) {
		ListFtpFile listFtpfiles = new ListFtpFile();
		listFtpfiles.download();
		listFtpfiles.upload();
	}
}

需要common-io 和common-net兩個jar包的，同學們自己下載吧