JAVA中的FtpClient与FTPClient,并实现jsp页面下载ftp服务器上的文件

JSP页面如何实现文件上传下载JSP页面如何实现文件上传下载Java 技术具有卓越的通用性、高效性、平台移植性和安全性，广泛应用于PC、数据中心、游戏控制台、科学超级计算机、移动电话和互联网，同时拥有全球最大的开发者专业社群。

下面，店铺为大家搜索整理了JSP页面如何实现文件上传下载，希望能给大家带来帮助!名称：jsp页面上传类作者：SinNeRMail：vogoals[at]特点：可以多文件上传;返回上传后的文件名;form表单中的其他参数也可以得到。

先贴上传类,JspFileUploadpackage com.vogoal.util;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.Hashtable;import javax.servlet.ServletInputStream;import javax.servlet.http.HttpServletRequest;/** vogoalAPI 1.0*************************** by *mail:********************//*** JSP上传文件类** @author SinNeR* @version 1.0*/public class JspFileUpload {/** request对象 */private HttpServletRequest request = null;/** 上传文件的路径 */private String uploadPath = null;/** 每次读取得字节的大小 */private static int BUFSIZE = 1024 * 8;/** 存储参数的Hashtable */private Hashtable paramHt = new Hasptable();/** 存储上传的文件的文件名的ArrayList */private ArrayList updFileArr = new ArrayList();/*** 设定request对象。

java实现ftp的几种方式（第3方包）最近在做ssh ，sftp。

顺便总结一下java实现ftp的几种方式。

.StringTokenizer;public class FtpUpfile {private FtpClient ftpclient;private String ipAddress;private int ipPort;private String userName;private String PassWord;/*** 构造函数* @param ip String 机器IP* @param port String 机器FTP端口号* @param username String FTP用户名* @param password String FTP密码* @throws Exception*/public FtpUpfile(String ip, int port, String username, String password) throws Exception {ipAddress = new String(ip);ipPort = port;ftpclient = new FtpClient(ipAddress, ipPort);//ftpclient = new FtpClient(ipAddress);userName = new String(username);PassWord = new String(password);}/*** 构造函数* @param ip String 机器IP，默认端口为21* @param username String FTP用户名* @param password String FTP密码* @throws Exception*/public FtpUpfile(String ip, String username, String password) throws Exception {ipAddress = new String(ip);ipPort = 21;ftpclient = new FtpClient(ipAddress, ipPort);//ftpclient = new FtpClient(ipAddress);userName = new String(username);PassWord = new String(password);}/*** 登录FTP服务器* @throws Exception*/public void login() throws Exception {ftpclient.login(userName, PassWord);}/*** 退出FTP服务器* @throws Exception*/public void logout() throws Exception {//用ftpclient.closeServer()断开FTP出错时用下更语句退出ftpclient.sendServer("QUIT\r\n");int reply = ftpclient.readServerResponse(); //取得服务器的返回信息}/*** 在FTP服务器上建立指定的目录,当目录已经存在的情下不会影响目录下的文件,这样用以判断FTP* 上传文件时保证目录的存在目录格式必须以"/"根目录开头* @param pathList String* @throws Exception*/public void adServerResponse();}ftpclient.binary();}/*** 取得指定目录下的所有文件名，不包括目录名称* 分析nameList得到的输入流中的数，得到指定目录下的所有文件名* @param fullPath String* @return ArrayList* @throws Exception*/public ArrayList fileNames(String fullPath) throws Exception {ftpclient.ascii(); //注意，使用字符模式TelnetInputStream list = List(fullPath);byte[] names = new byte[2048];int bufsize = 0;bufsize = list.read(names, 0, names.length); //从流中读取list.close();ArrayList namesList = new ArrayList();int i = 0;int j = 0;while (i < bufsize /*names.length*/) {//char bc = (char) names;//System.out.println(i + " " + bc + " : " + (int) names);//i = i + 1;if (names[i] == 10) { //字符模式为10，二进制模式为13//文件名在数据中开始下标为j,i-j为文件名的长度,文件名在数据中的结束下标为i -1//System.out.write(names, j, i - j);//System.out.println(j + " " + i + " " + (i - j));String tempName = new String(names, j, i - j);namesList.add(tempName);//System.out.println(temp);// 处理代码处//j = i + 2; //上一次位置二进制模式j = i + 1; //上一次位置字符模式}i = i + 1;}return namesList;}/*** 上传文件到FTP服务器,destination路径以FTP服务器的"/"开始，带文件名、* 上传文件只能使用二进制模式，当文件存在时再次上传则会覆盖* @param source String* @param destination String* @throws Exception*/public void upFile(String source, String destination) throws Exception { buildList(destination.substring(0, stIndexOf("/")));ftpclient.binary(); //此行代码必须放在buildList之后TelnetOutputStream ftpOut = ftpclient.put(destination);TelnetInputStream ftpIn = new TelnetInputStream(newFileInputStream(source), true);byte[] buf = new byte[204800];int bufsize = 0;while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) {ftpOut.write(buf, 0, bufsize);}ftpIn.close();ftpOut.close();}ush();ftpOut.close();}/*** 从FTP文件服务器上下载文件SourceFileName，到本地destinationFileName * 所有的文件名中都要求包括完整的路径名在内* @param SourceFileName String* @param destinationFileName String* @throws Exception*/public void downFile(String SourceFileName, String destinationFileName) throws Exception {ftpclient.binary(); //一定要使用二进制模式TelnetInputStream ftpIn = ftpclient.get(SourceFileName);byte[] buf = new byte[204800];int bufsize = 0;FileOutputStream ftpOut = new FileOutputStream(destinationFileName);while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) {ftpOut.write(buf, 0, bufsize);}ftpOut.close();ftpIn.close();}/***从FTP文件服务器上下载文件，输出到字节数组中* @param SourceFileName String* @return byte[]* @throws Exception*/public byte[] downFile(String SourceFileName) throwsException {ftpclient.binary(); //一定要使用二进制模式TelnetInputStream ftpIn = ftpclient.get(SourceFileName);ByteArrayOutputStream byteOut = new ByteArrayOutputStream();byte[] buf = new byte[204800];int bufsize = 0;while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) {byteOut.write(buf, 0, bufsize);}byte[] return_arraybyte = byteOut.toByteArray();byteOut.close();ftpIn.close();return return_arraybyte;}/**调用示例* FtpUpfile fUp = new FtpUpfile("192.150.189.22", 21, "admin", "admin");* fUp.login();* fUp.buildList("/adfadsg/sfsdfd/cc");* String destination = "/test.zip";* fUp.upFile("C:\\Documents and Settings\\Administrator\\My Documents\\sample.zi p",destination);* ArrayList filename = fUp.fileNames("/");* for (int i = 0; i < filename.size(); i++) {* System.out.println(filename.get(i).toString());* }* fUp.logout();* @param args String[]* @throws Exception*/public static void main(String[] args) throws Exception {FtpUpfile fUp = new FtpUpfile("172.16.0.142", 22, "ivr", "ivr");fUp.login();/* fUp.buildList("/adfadsg/sfsdfd/cc");String destination = "/test/SetupDJ.rar";fUp.upFile("C:\\Documents and Settings\\Administrator\\My Documents\\SetupDJ.rar", destination);ArrayList filename = fUp.fileNames("/");for (int i = 0; i < filename.size(); i++) {System.out.println(filename.get(i).toString());}fUp.downFile("/sample.zip", "d:\\sample.zip");*/FileInputStream fin = new FileInputStream("d:\\wapPush.txt");byte[] data = new byte[20480000];fin.read(data, 0, data.length);fUp.upFile(data, "/home/cdr/wapPush.txt");fUp.logout();System.out.println("程序运行完成！");/*FTP远程命令列表USER PORT RETR ALLO DELE SITE XMKD CDUP FEATPASS PASV STOR REST CWD STAT RMD XCUP OPTSACCT TYPE APPE RNFR XCWD HELP XRMD STOU AUTH REIN STRU SMNT RNTO LIST NOOP PWD SIZE PBSZQUIT MODE SYST ABOR NLST MKD XPWD MDTM PROT *//*在服务器上执行命令,如果用sendServer来执行远程命令(不能执行本地FTP命令)的话，所有FTP命令都要加上\r\nftpclient.sendServer("XMKD /test/bb\r\n"); //执行服务器上的FTP命令ftpclient.readServerResponse一定要在sendServer后调用nameList("/test")获取指目录下的文件列表XMKD建立目录，当目录存在的情况下再次创建目录时报错XRMD删除目录DELE删除文件*/}}package com.ftp;p.FTPFile;import .ftp.FTPFileEntryParser;import .TelnetInputStream;public class FtpAppache {public FtpAppache() throws Exception{// .ftp.FtpClient ft = null;// TelnetInputStream t = ft.list();// t.setStickyCRLF(true);}public void test1() throws Exception {//String strTemp = "";//InetAddress ia = InetAddress.getByName("192.168.0.193");FTPClient ftp = new FTPClient();ftp.connect("172.16.0.142",22);boolean blogin = ftp.login("ivr", "ivr");if (!blogin) {System.out.println("连接失败");();ftp = null;return;}/*//如果是中文名必需进行字符集转换boolean bMakeFlag = ftp.makeDirectory(new String("测试目录".getBytes( "gb2312"), "iso-8859-1")); //在服务器创建目录//上传文件到服务器，目录自由创建File file = new File("c:\\test.properties");ftp.storeFile("test.properties",new FileInputStream(file));*/System.out.println(SystemName());FTPFile[] ftpFiles = ();if (ftpFiles != null) {for (int i = 0; i < ftpFiles.length; i++) {System.out.println(ftpFiles[i].getName());//System.out.println(ftpFiles[i].isFile());if (ftpFiles[i].isFile()) {FTPFile ftpf = new FTPFile();/*System.err.println(ftpf.hasPermission(FTPFile.GROUP_ACCESS,FTPFile.EXECUTE_PERMISSION));System.err.println("READ_PERMISSION="+ftpf.hasPermission( ER_ACCESS,FTPFile.READ_PERMISSION));System.err.println("EXECUTE_PERMISSION="+ftpf.hasPermission(FTPFile. USER_ACCESS,FTPFile.EXECUTE_PERMISSION));System.err.println("WRITE_PERMISSION="+ftpf.hasPermission(FTPFile.U SER_ACCESS,FTPFile.WRITE_PERMISSION));System.err.println(ftpf.hasPermission(FTPFile.WORLD_ACCESS,FTPFile.READ_PERMISSION));*/}//System.out.println(ftpFiles[i].getUser());}}//下载服务器文件FileOutputStream fos = new FileOutputStream("e:/proftpd-1.2.10.tar.gz");ftp.retrieveFile("proftpd-1.2.10.tar.gz",fos);fos.close();//改变ftp目录//ftp.changeToParentDirectory();//回到父目录//ftp.changeWorkingDirectory("");//转移工作目录//pletePendingCommand();////删除ftp服务器文件//ftp.deleteFile("");//注销当前用户，//ftp.logout();//ftp.structureMount("");();ftp = null;}/*** 封装好的东西是好用，碰到这种问题，我们就。

JAVA技术实现上传下载文件到FTP服务器（完整）FavFTPUtil.Javapackage com.favccxx.favsoft.util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import .ftp.FTPClient; import .ftp.FTPFile;import .ftp.FTPReply; public class FavFTPUtil {/*** 上传文件（可供Action/Controller层使用）* @param hostname FTP服务器地址* @param port FTP服务器端口号* @param username FTP登录帐号* @param password FTP登录密码* @param pathname FTP服务器保存目录* @param fileName 上传到FTP服务器后的文件名称* @param inputStream 输入文件流* @return*/public static boolean uploadFile(String hostname, int port, String username, String password, String pathname, String fileName, InputStream inputStream){boolean flag = false;FTPClient ftpClient = new FTPClient();ftpClient.setControlEncoding("UTF-8");try {//连接FTP服务器ftpClient.connect(hostname, port);//登录FTP服务器ftpClient.login(username, password);//是否成功登录FTP服务器int replyCode = ftpClient.getReplyCode();if(!FTPReply.isPositiveCompletion(replyCode)){return flag;}ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);ftpClient.makeDirectory(pathname);ftpClient.changeWorkingDirectory(pathname);ftpClient.storeFile(fileName, inputStream);inputStream.close();ftpClient.logout();flag = true;} catch (Exception e) {e.printStackTrace();} finally{if(ftpClient.isConnected()){try {ftpClient.disconnect();} catch (IOException e) {e.printStackTrace();}}}return flag;}/*** 上传文件（可对文件进行重命名）* @param hostname FTP服务器地址* @param port FTP服务器端口号* @param username FTP登录帐号* @param password FTP登录密码* @param pathname FTP服务器保存目录* @param filename 上传到FTP服务器后的文件名称* @param originfilename 待上传文件的名称（绝对地址）* @return*/public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String filename, String originfilename){boolean flag = false;try {InputStream inputStream = new FileInputStream(new File(originfilename));flag = uploadFile(hostname, port, username, password, pathname, filename, inputStream);} catch (Exception e) {e.printStackTrace();}return flag;}/*** 上传文件（不可以进行文件的重命名操作）* @param hostname FTP服务器地址* @param port FTP服务器端口号* @param username FTP登录帐号* @param password FTP登录密码* @param pathname FTP服务器保存目录* @param originfilename 待上传文件的名称（绝对地址）* @return*/public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String originfilename){boolean flag = false;try {String fileName = new File(originfilename).getName();InputStream inputStream = new FileInputStream(new File(originfilename));flag = uploadFile(hostname, port, username, password, pathname, fileName, inputStream);} catch (Exception e) {e.printStackTrace();}return flag;}/*** 删除文件* @param hostname FTP服务器地址* @param port FTP服务器端口号* @param username FTP登录帐号* @param password FTP登录密码* @param pathname FTP服务器保存目录* @param filename 要删除的文件名称* @return*/public static boolean deleteFile(String hostname, int port, String username, String password, String pathname, String filename){boolean flag = false;FTPClient ftpClient = new FTPClient();try {//连接FTP服务器ftpClient.connect(hostname, port);//登录FTP服务器ftpClient.login(username, password);//验证FTP服务器是否登录成功int replyCode = ftpClient.getReplyCode();if(!FTPReply.isPositiveCompletion(replyCode)){return flag;}//切换FTP目录ftpClient.changeWorkingDirectory(pathname);ftpClient.dele(filename);ftpClient.logout();flag = true;} catch (Exception e) {e.printStackTrace();} finally{if(ftpClient.isConnected()){try {ftpClient.logout();} catch (IOException e) {}}}return flag;}/*** 下载文件* @param hostname FTP服务器地址* @param port FTP服务器端口号* @param username FTP登录帐号* @param password FTP登录密码* @param pathname FTP服务器文件目录* @param filename 文件名称* @param localpath 下载后的文件路径* @return*/public static boolean downloadFile(String hostname, int port, String username, String password, String pathname, String filename, String localpath){boolean flag = false;FTPClient ftpClient = new FTPClient();try {//连接FTP服务器ftpClient.connect(hostname, port);//登录FTP服务器ftpClient.login(username, password);//验证FTP服务器是否登录成功int replyCode = ftpClient.getReplyCode();if(!FTPReply.isPositiveCompletion(replyCode)){return flag;}//切换FTP目录ftpClient.changeWorkingDirectory(pathname); FTPFile[] ftpFiles = ftpClient.listFiles();for(FTPFile file : ftpFiles){if(filename.equalsIgnoreCase(file.getName())){File localFile = new File(localpath + "/" + file.getName()); OutputStream os = new FileOutputStream(localFile); ftpClient.retrieveFile(file.getName(), os);os.close();}}ftpClient.logout();flag = true;} catch (Exception e) {e.printStackTrace();} finally{if(ftpClient.isConnected()){try {ftpClient.logout();} catch (IOException e) {}}}return flag;}}FavFTPUtilTest.javapackage com.favccxx.favsoft.util;import junit.framework.TestCase;public class FavFTPTest extends TestCase {public void testFavFTPUtil(){String hostname = "127.0.0.1";int port = 21;String username = "business";String password = "business";String pathname = "business/ebook";String filename = "big.rar";String originfilename = "C:\\Users\\Downloads\\Downloads.rar";FavFTPUtil.uploadFileFromProduction(hostname, port, username, password, pathname, filename, originfilename);// String localpath = "D:/";// FavFTPUtil.downloadFile(hostname, port, username, password, pathname, filename, localpath);}}。

1、采用RequestDispatcher的方式进行jsp页面中添加如下代码：复制代码1.<%2. response.setContentType("application/x-download");//设置为下载application/x-download3. String filedownload = "/要下载的文件名";//即将下载的文件的相对路径4. String filedisplay = "最终要显示给用户的保存文件名";//下载文件时显示的文件保存名称5. filenamedisplay = URLEncoder.encode(filedisplay,"UTF-8");6. response.addHeader("Content-Disposition","attachment;filename=" + filedisplay);7.8. try9. ...{10. RequestDispatcher dis = application.getRequestDispatcher(filedownload);11. if(dis!= null)12. ...{13. dis.forward(request,response);14. }15. response.flushBuffer();16. }17. catch(Exception e)18. ...{19. e.printStackTrace();20. }21. finally22. ...{23.24. }25.%>2、采用文件流输出的方式下载复制代码1.<%@page language="java" contentType="application/x-msdownload" pageEncoding="gb2312"%>2.<%3. //关于文件下载时采用文件流输出的方式处理：4. //加上response.reset()，并且所有的％>后面不要换行，包括最后一个；5.6. response.reset();//可以加也可以不加7. response.setContentType("application/x-download");8. String filedownload = "想办法找到要提供下载的文件的物理路径＋文件名";9. String filedisplay = "给用户提供的下载文件名";10. filedisplay = URLEncoder.encode(filedisplay,"UTF-8");11. response.addHeader("Content-Disposition","attachment;filename=" + filedisplay);12.13. OutputStream outp = null;14. FileInputStream in = null;15. try16. ...{17. outp = response.getOutputStream();18. in = new FileInputStream(filenamedownload);19.20. byte[] b = new byte[1024];21. int i = 0;22.23. while((i = in.read(b)) > 0)24. ...{25. outp.write(b, 0, i);26. }27. outp.flush();28. }29. catch(Exception e)30. ...{31. System.out.println("Error!");32. e.printStackTrace();33. }34. finally35. ...{36. if(in != null)37. ...{38. in.close();39. in = null;40. }41. if(outp != null)42. ...{43. outp.close();44. outp = null;45. }46. }47.%>48.。