怎么用JSP把本地的文件夹上传到FTP服务器？

前段时间做了一个文件上传ftp功能，你参照一下

package comftpupload;

import javaioFile;

import javaioFileInputStream;

import javaioFileOutputStream;

import javaioIOException;

import javaioInputStream;

import javaioOutputStream;

import orgapachecommonsioFileUtils;

import orgapachecommonsioIOUtils;

import orgapachecommonsnetftpFTPClient;

import orgapachecommonsnetftpFTPFile;

import orgapachecommonsnetftpFTPReply;

public class FTPUpload {

private FTPClient ftpClient = null;

private OutputStream outSteam = null;

/

ftp服务器地址

/

private String hostname = "19216812";

/

ftp服务器端口

/

int port = 21;

/

登录名

/

private String username = "admin";

/

登录密码

/

private String password = "admin";

/

需要访问的远程目录

/

private String remoteDir = "/home/demo";

public FTPUpload() { }

public FTPUpload(String hostname, int port, String username, String password, String remoteDir){

thishostname = hostname;

thisport = port;

thisusername = username;

thispassword = password;

thisremoteDir = remoteDir;

}

/

连接FTP服务器 并登录

@param hostName 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

/

private FTPClient connectFTPServer() {

try {

//1创建FTPClient对象

ftpClient = new FTPClient();

//2连接FTP服务器

// 如果采用默认端口，可以使用ftpconnect(url)的方式直接连接FTP服务器

ftpClientconnect(hostname, port); //链接到ftp服务器

// Systemoutprintln("连接到ftp服务器地址 --> ftp://" + hostName + ":" + port + " 成功开始登录");

//3判断连接ftp服务器是否成功

int reply = ftpClientgetReplyCode();

// Systemoutprintln("以2开头的返回值就会为真：" + reply);

//以2开头的返回值就会为真

if (!FTPReplyisPositiveCompletion(reply)) {

ftpClientdisconnect();

return null;

}

//4登录FTP服务器用户名 密码

ftpClientlogin(username, password);

Systemoutprintln("登录成功" );

return ftpClient;

} catch (Exception e) {

eprintStackTrace();

ftpClient = null;

return ftpClient;

}

}

/

向FTP服务器上传文件

@param filePathName 上传文件的全路径名称

@return 成功返回true，否则返回false

/

public boolean uploadFile(String filePathName) {

// 初始表示上传失败

boolean success = false;

try {

// 创建FTPClient对象

ftpClient = connectFTPServer();

//创建文件夹

boolean flag = ftpClientmakeDirectory(remoteDir);

if(flag) {

Systemoutprintln("创建文件夹：" + remoteDir );

}

// 转到指定上传目录

boolean flag0 = ftpClientchangeWorkingDirectory(remoteDir);

// 将上传文件存储到指定目录

if(filePathName == null || filePathNamelength() == 0){

return success;

}

String filename = filePathNamesubstring(filePathNamereplace("\\", "/")lastIndexOf("/") + 1, filePathNamelength());

InputStream input = new FileInputStream(new File(filePathName));

// ftpClientsetBufferSize(1024);

// ftpClientsetControlEncoding("GBK");

// ftpClientsetFileType(FTPClientBINARY_FILE_TYPE);//设置文件类型

boolean flag1 = ftpClientstoreFile(filename, input);

Systemoutprintln("转到指定上传目录：" + flag0 + " 将上传文件存储到指定目录：" + flag1);

inputclose(); // 关闭输入流

ftpClientlogout(); // 退出ftp

success = true; // 表示上传成功

} catch (Exception e) {

eprintStackTrace();

} finally {

if (ftpClientisConnected()) {

try {

ftpClientdisconnect();

} catch (IOException ioe) {

}

}

}

return success;

}

/

从FTP服务器指定目录下载文件 到本地目录中 OK

@param fileName 要下载的文件名

@param localPath 下载后保存到本地的路径

@param showlist 下载时是否显示列表 ( true 显示 )

@return

/

public boolean downFile(String fileName, String localPath, boolean showlist) {

// 初始表示下载失败

boolean success = false;

if(fileName == null || fileNamelength() == 0 || localPath == null || localPathlength() == 0){

return success;

}

try {

File file = new File(localPath);

if(!fileisDirectory()){

filemkdir();

}

// 创建FTPClient对象

ftpClient = connectFTPServer();

// 转到指定下载目录

boolean flag = ftpClientchangeWorkingDirectory(remoteDir);

if(!flag) {

Systemoutprintln("目录：" + remoteDir +"不存在!");

return success;

}

// 列出该目录下所有文件

FTPFile[] remoteFiles = ftpClientlistFiles();

// 遍历所有文件，找到指定的文件

if(showlist){

Systemoutprintln("目录" + remoteDir + "下的文件:");

}

for (FTPFile ftpFile : remoteFiles) {

String name = ftpFilegetName();

if(showlist){

long length = ftpFilegetSize();

String readableLength = FileUtilsbyteCountToDisplaySize(length);

Systemoutprintln(name + ":\t\t" + readableLength);

}

if (nameequals(fileName)) {

// 根据绝对路径初始化文件

File localFile = new File(localPath + "/" + name);

// 输出流

OutputStream is = new FileOutputStream(localFile);

// 下载文件

ftpClientretrieveFile(name, is);

isclose();

}

}

// 退出ftp

ftpClientlogout();

// 下载成功

success = true;

} catch (IOException e) {

eprintStackTrace();

} finally {

if (ftpClientisConnected()) {

try {

ftpClientdisconnect();

} catch (IOException ioe) {

}

}

}

return success;

}

/

显示FTP服务器指定文件夹中的文件及大小 OK

@return

/

private boolean showFileList() {

// 初始表示失败

boolean success = false;

try {

ftpClient = connectFTPServer();

FTPFile[] remoteFiles = null;

// 转到指定下载目录

boolean flag = ftpClientchangeWorkingDirectory(remoteDir);

if(!flag) {

Systemoutprintln("目录：" + remoteDir +"不存在!");

return success;

} else{

remoteFiles = ftpClientlistFiles(remoteDir);

Systemoutprintln("目录" + remoteDir + "下的文件:");

}

if(remoteFiles != null) {

for(int i=0;i < remoteFileslength; i++){

String name = remoteFiles[i]getName();

long length = remoteFiles[i]getSize();

String readableLength = FileUtilsbyteCountToDisplaySize(length);

Systemoutprintln(name + ":\t\t" + readableLength);

}

}

// 表示成功

success = true;

} catch (Exception e) {

eprintStackTrace();

} finally {

//使用IO包关闭流

IOUtilscloseQuietly(outSteam);

try {

ftpClientdisconnect();

} catch (IOException ioe) {

ioeprintStackTrace();

}

}

return success;

}

public static void main(String[] args) {

FTPUpload ftp = new FTPUpload();

ftpuploadFile("c:////test////bgsspjar");

}

}

准备条件：java实现ftp上传用到了commons-net-33jar包

首先建立ftphost连接

public boolean connect(String path, String addr, int port, String username, String password) {

try {

//FTPClient ftp = new FTPHTTPClient(addr, port, username, password);

ftp = new FTPClient();

int reply;

ftpconnect(addr);

Systemoutprintln("连接到：" + addr + ":" + port);

Systemoutprint(ftpgetReplyString());

reply = ftpgetReplyCode();

if (!FTPReplyisPositiveCompletion(reply)) {

ftpdisconnect();

Systemerrprintln("FTP目标服务器积极拒绝");

Systemexit(1);

return false;

}else{

ftplogin(username, password);

ftpenterLocalPassiveMode();

ftpsetFileType(FTPClientBINARY_FILE_TYPE);

ftpchangeWorkingDirectory(path);

Systemoutprintln("已连接：" + addr + ":" + port);

return true;

}

} catch (Exception ex) {

exprintStackTrace();

Systemoutprintln(exgetMessage());

return false;

}

}

然后再利用ftpclient的makeDirectory方法创建文件夹

public void createDir(String dirname){

try{

ftpmakeDirectory(dirname);

Systemoutprintln("在目标服务器上成功建立了文件夹: " + dirname);

}catch(Exception ex){

Systemoutprintln(exgetMessage());

}

}

断开host连接

public void disconnect(){

try {

ftpdisconnect();

} catch (IOException e) {

eprintStackTrace();

}

}

最后是程序的调用方法

public static void main(String[] args) {

FtpUploadTest ftpupload = new FtpUploadTest();

if(ftpuploadconnect("", "172398x", 20, "administrator", "abc@123")){

ftpuploadcreateDir("/UPLOAD");

ftpuploaddisconnect();

}

}