java用ftp做数据传输方案

⑴ 我想登录一个ftp然后把某个目录的所有文件考到另一个ftp的目录的某个文件夹下用java代码实现

用的commons-net包中的FTPClient
ftp1为拷贝目录,ftp2为被拷贝目录
你先登录ftp2调用ftp1,
ftpClient1.changeWorkingDirectory(path);
InputStream inputStream = ftpClient1.retrieveFileStream(file.getName());
用这个代码应该可以从ftp1中获得一个inputStream ,在ftp2中可以做上传操作
目录的话ftp2还要做递归存放到list中,ftp2遍历上传. 其实我也没做这个,希望思路有点帮助,应该可以实现.good luck!~~~

⑵ JAVA 传输文件

//以前写的一个文件传输的小程序，有客户端和服务器端两部分，服务器可//以一直运行，客户端传输完一个后退出，当然你也可以根据你的需要改。
//服务器端可以支持多个客户端同时上传，用到了多线程
/**
* 文件传输，客户端
* @aurth anyx
*/
//package per.anyx.ftp;

import java.net.*;
import java.io.*;

public class FtpClient{
public static void main(String[] args){
if(args.length != 3){
System.out.println("Usage: FtpClient host_add host_port src_file");
System.exit(0);
}
File file = new File(args[2]);
if(!file.exists() || !file.isFile()){
System.out.println("File \"" + args[2] + "\" does not exist or is not a normal file.");
System.exit(0);
}
Socket s = null;
FileInputStream in = null;
OutputStream out = null;
try{
s = new Socket(args[0], Integer.parseInt(args[1]));
in = new FileInputStream(file);
out = s.getOutputStream();

byte[] buffer = new byte[1024*8];
int len = -1;
System.out.println("File tansfer statr...");
while((len=in.read(buffer)) != -1){
out.write(buffer, 0, len);
}
System.out.println("File tansfer complete...");
}catch(Exception e){
System.out.println("Error: " + e.getMessage());
System.exit(1);
}finally{
try{
if(in != null) in.close();
if(out != null) out.close();
if(s != null) s.close();
}catch(Exception e){}
}
}
}

/**
* 文件传输，服务器端
* @aurth anyx
*/
//package per.anyx.ftp;

import java.net.*;
import java.io.*;

public class FtpServer{
public static void main(String[] args){
if(args.length != 1){
System.out.println("Usage: FtpServer server_port");
System.exit(0);
}
ServerSocket ss = null;
try{
ss = new ServerSocket(Integer.parseInt(args[0]));
System.out.println("FtpServer start on port ..." + args[0]);
while(true){
Socket s = ss.accept();
new FtpThread(s).start();
System.out.println(s.getInetAddress().getHostAddress() + " connected.");
}
}catch(Exception e){
System.out.println("Error: " + e.getMessage());
}finally{
try{
if(ss != null) ss.close();
}catch(Exception e){}
}
}
}

class FtpThread extends Thread{
Socket s;
long fileName = 0;
public FtpThread(Socket s){
this.s = s;
}
public void run(){
FileOutputStream out = null;
InputStream in = null;
File file = null;
do{
file = new File("" + (fileName++));
}while(file.exists());
try{
out = new FileOutputStream(file);
in = s.getInputStream();

byte[] buffer = new byte[1024*8];
int len = -1;
while((len=in.read(buffer)) != -1){
out.write(buffer, 0, len);
}
}catch(Exception e){
System.out.println("Error: " + e.getMessage());
}finally{
try{
if(in != null) in.close();
if(out != null) out.close();
if(s != null) s.close();
System.out.println(s.getInetAddress().getHostAddress() + " connect closed..");
}catch(Exception e){}
}
}
}

⑶ javaweb 怎么样将本地文件传输到远程服务器

可以通过JDK自带的API实现，如下代码：
package com.cloudpower.util;
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
*/
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
* @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);
}
}
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);
}
}
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();
}
}
}
}
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();
}
}

⑷ 如何使用java远程传输文件，client只提供ip\文件路径等参数，server端无需部署服务！

其实有几种方式的，
1 ftp传输应用情况，加入在linux系统端有一些文件需要下载到用户电脑专client端，而linux系统又不是web服务器，属那么可以通过java程序FTP方式登录到linux，读取文件转换为流输出到用户IE端， java访问Linux服务器读取文件 所需jar包：j2ssh-core-0.2.2.jar
2 socket方式，可以应用于比如server-client 聊天窗，传输文字；
3 http协议，这种就是最常用的了，比如打开IE下载，上传东西，java是通过jsp servlet来实现的，然后部署放在tomcat web 服务器上，在其他局域网环境下的电脑登录IE即可访问到。没有特殊jar，只用java servlet的jar即可。例子如附件，可能上传不成功哈，网络网络会有很多哈

⑸ java 实现ftp上传如何创建文件夹

这个功能我也刚写完，不过我也是得益于同行，现在我也把自己的分享给大家，希望能对大家有所帮助，因为自己的项目不涉及到创建文件夹，也仅作分享,不喜勿喷谢谢！

interface：
packagecom.sunline.bank.ftputil;

importjava.io.BufferedInputStream;
importjava.io.BufferedOutputStream;
importorg.apache.commons.net.ftp.FTPClient;

publicinterfaceIFtpUtils{
	/**
	*ftp登录
	*@paramhostname主机名
	*@paramport端口号
	*@paramusername用户名
	*@parampassword密码
	*@return
	*/
	publicFTPClientloginFtp(Stringhostname,Integerport,Stringusername,Stringpassword);
	/**
	*上穿文件
	*@paramhostname主机名
	*@paramport端口号
	*@paramusername用户名
	*@parampassword密码
	*@paramfpathftp路径
	*@paramlocalpath本地路径
	*@paramfileName文件名
	*@return
	*/
	(Stringhostname,Integerport,Stringusername,Stringpassword,Stringfpath,Stringlocalpath,StringfileName);
	/**
	*批量下载文件
	*@paramhostname
	*@paramport
	*@paramusername
	*@parampassword
	*@paramfpath
	*@paramlocalpath
	*@paramfileName源文件名
	*@paramfilenames需要修改成的文件名
	*@return
	*/
	publicbooleandownloadFileList(Stringhostname,Integerport,Stringusername,Stringpassword,Stringfpath,Stringlocalpath,StringfileName,Stringfilenames);
	/**
	*修改文件名
	*@paramlocalpath
	*@paramfileName源文件名
	*@paramfilenames需要修改的文件名
	*/
	(Stringlocalpath,StringfileName,Stringfilenames);
	/**
	*关闭流连接、ftp连接
	*@paramftpClient
	*@parambufferRead
	*@parambuffer
	*/
	publicvoidcloseFtpConnection(FTPClientftpClient,,BufferedInputStreambuffer);
}

impl:
packagecom.sunline.bank.ftputil;

importjava.io.BufferedInputStream;
importjava.io.BufferedOutputStream;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.io.IOException;
importorg.apache.commons.net.ftp.FTPClient;
importorg.apache.commons.net.ftp.FTPFile;
importorg.apache.commons.net.ftp.FTPReply;
importcommon.Logger;

{
	privatestaticLoggerlog=Logger.getLogger(FtpUtilsImpl.class);
	FTPClientftpClient=null;
	Integerreply=null;
	
	@Override
	publicFTPClientloginFtp(Stringhostname,Integerport,Stringusername,Stringpassword){
			ftpClient=newFTPClient();
		try{
			ftpClient.connect(hostname,port);
			ftpClient.login(username,password);
			ftpClient.setControlEncoding("utf-8");
			reply=ftpClient.getReplyCode();
			ftpClient.setDataTimeout(60000);
			ftpClient.setConnectTimeout(60000);
			//设置文件类型为二进制(避免解压缩文件失败)
			ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
			//开通数据端口传输数据，避免阻塞
			ftpClient.enterLocalActiveMode();
			if(!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){
				log.error("连接FTP失败，用户名或密码错误");
			}else{
				log.info("FTP连接成功");
			}
		}catch(Exceptione){
			if(!FTPReply.isPositiveCompletion(reply)){
				try{
					ftpClient.disconnect();
				}catch(IOExceptione1){
					log.error("登录FTP失败，请检查FTP相关配置信息是否正确",e1);
				}
			}
		}
		returnftpClient;
	}
	
	@Override
	@SuppressWarnings("resource")
	(Stringhostname,Integerport,Stringusername,Stringpassword,Stringfpath,Stringlocalpath,StringfileName){
		booleanflag=false;
		ftpClient=loginFtp(hostname,port,username,password);
		BufferedInputStreambuffer=null;
		try{
			buffer=newBufferedInputStream(newFileInputStream(localpath+fileName));
			ftpClient.changeWorkingDirectory(fpath);
			fileName=newString(fileName.getBytes("utf-8"),ftpClient.DEFAULT_CONTROL_ENCODING);
			if(!ftpClient.storeFile(fileName,buffer)){
				log.error("上传失败");
				returnflag;
			}
			buffer.close();
			ftpClient.logout();
			flag=true;
			returnflag;
		}catch(Exceptione){
			e.printStackTrace();
		}finally{
			closeFtpConnection(ftpClient,null,buffer);
			log.info("文件上传成功");
		}
		returnfalse;
	}

	@Override
	publicbooleandownloadFileList(Stringhostname,Integerport,Stringusername,Stringpassword,Stringfpath,Stringlocalpath,StringfileName,Stringfilenames){
		ftpClient=loginFtp(hostname,port,username,password);
		booleanflag=false;
=null;
		if(fpath.startsWith("/")&&fpath.endsWith("/")){
			try{
				//切换到当前目录
				this.ftpClient.changeWorkingDirectory(fpath);
				this.ftpClient.enterLocalActiveMode();
				FTPFile[]ftpFiles=this.ftpClient.listFiles();
				for(FTPFilefiles:ftpFiles){
					if(files.isFile()){
						System.out.println("=================="+files.getName());
						FilelocalFile=newFile(localpath+"/"+files.getName());
						bufferRead=newBufferedOutputStream(newFileOutputStream(localFile));
						ftpClient.retrieveFile(files.getName(),bufferRead);
						bufferRead.flush();
					}
				}
				ftpClient.logout();
				flag=true;

			}catch(IOExceptione){
				e.printStackTrace();
			}finally{
	closeFtpConnection(ftpClient,bufferRead,null);
	log.info("文件下载成功");
	}
		}
		modifiedLocalFileName(localpath,fileName,filenames);
		returnflag;
	}
	
	@Override
	(Stringlocalpath,StringfileName,Stringfilenames){
		Filefile=newFile(localpath);
		File[]fileList=file.listFiles();
		if(file.exists()){
			if(null==fileList||fileList.length==0){
				log.error("文件夹是空的");
			}else{
				for(Filedata:fileList){
					Stringorprefix=data.getName().substring(0,data.getName().lastIndexOf("."));
					Stringprefix=fileName.substring(0,fileName.lastIndexOf("."));
					System.out.println("index==="+orprefix+"prefix==="+prefix);
					if(orprefix.contains(prefix)){
					booleanf=data.renameTo(newFile(localpath+"/"+filenames));
					System.out.println("f============="+f);
					}else{
						log.error("需要重命名的文件不存在，请检查。。。");
					}
				}
			}
		}
	}
	
	
	@Override
	publicvoidcloseFtpConnection(FTPClientftpClient,,BufferedInputStreambuffer){
		if(ftpClient.isConnected()){
try{
ftpClient.disconnect();
}catch(IOExceptione){
e.printStackTrace();
}
}
		if(null!=bufferRead){
try{
bufferRead.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
		if(null!=buffer){
try{
	buffer.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
	}
	
	
	publicstaticvoidmain(String[]args)throwsIOException{
		Stringhostname="xx.xxx.x.xxx";
		Integerport=21;
		Stringusername="edwftp";
		Stringpassword="edwftp";
		Stringfpath="/etl/etldata/back/";
		StringlocalPath="C:/Users/Administrator/Desktop/ftp下载/";
		StringfileName="test.txt";
		Stringfilenames="ok.txt";
		FtpUtilsImplftp=newFtpUtilsImpl();
		/*ftp.modifiedLocalFileName(localPath,fileName,filenames);*/
		ftp.downloadFileList(hostname,port,username,password,fpath,localPath,fileName,filenames);
		/*ftp.uploadLocalFilesToFtp(hostname,port,username,password,fpath,localPath,fileName);*/
		/*ftp.modifiedLocalFileName(localPath);*/
	}
}

⑹ 如何在Java程序中实现FTP的上传下载功能

以下是这三部分的JAVA源程序： (1)显示FTP服务器上的文件 void ftpList_actionPerformed(ActionEvent e) {String server=serverEdit.getText();//输入的FTP服务器的IP地址 String user=userEdit.getText();//登录FTP服务器的用户名 String password=passwordEdit.getText();//登录FTP服务器的用户名的口令 String path=pathEdit.getText();//FTP服务器上的路径 try {FtpClient ftpClient=new FtpClient();//创建FtpClient对象 ftpClient.openServer(server);//连接FTP服务器 ftpClient.login(user, password);//登录FTP服务器 if (path.length()!=0) ftpClient.cd(path); TelnetInputStream is=ftpClient.list(); int c; while ((c=is.read())!=-1) { System.out.print((char) c);} is.close(); ftpClient.closeServer();//退出FTP服务器 } catch (IOException ex) {;} } (2)从FTP服务器上下传一个文件 void getButton_actionPerformed(ActionEvent e) { String server=serverEdit.getText(); String user=userEdit.getText(); String password=passwordEdit.getText(); String path=pathEdit.getText(); String filename=filenameEdit.getText(); try { FtpClient ftpClient=new FtpClient(); ftpClient.openServer(server); ftpClient.login(user, password); if (path.length()!=0) ftpClient.cd(path); ftpClient.binary(); TelnetInputStream is=ftpClient.get(filename); File file_out=new File(filename); FileOutputStream os=new FileOutputStream(file_out); byte[] bytes=new byte[1024]; int c; while ((c=is.read(bytes))!=-1) { os.write(bytes,0,c); } is.close(); os.close(); ftpClient.closeServer(); } catch (IOException ex) {;} } (3)向FTP服务器上上传一个文件 void putButton_actionPerformed(ActionEvent e) { String server=serverEdit.getText(); String user=userEdit.getText(); String password=passwordEdit.getText(); String path=pathEdit.getText(); String filename=filenameEdit.getText(); try { FtpClient ftpClient=new FtpClient(); ftpClient.openServer(server); ftpClient.login(user, password); if (path.length()!=0) ftpClient.cd(path); ftpClient.binary(); TelnetOutputStream os=ftpClient.put(filename); File file_in=new File(filename); FileInputStream is=new FileInputStream(file_in); byte[] bytes=new byte[1024]; int c; while ((c=is.read(bytes))!=-1){ os.write(bytes,0,c);} is.close(); os.close(); ftpClient.closeServer(); } catch (IOException ex) {;} } }