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;

 

/**

 * ftp上传下载工具类

 */

public class FtpUtil {

 

       /**

        * Description: 向FTP服务器上传文件

        * @param host 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 basePath FTP服务器基础目录

        * @param filePath FTP服务器文件存放路径。例如分日期存放:/2015/01/01。文件的路径为basePath+filePath

        * @param filename 上传到FTP服务器上的文件名

        * @param input 输入流

        * @return 成功返回true,否则返回false

        */ 

       public static boolean uploadFile(String host, int port, String username, String password, String basePath,

                     String filePath, String filename, InputStream input) {

              boolean result = false;

              FTPClient ftp = new FTPClient();

              try {

                     int reply;

                     ftp.connect(host, port);// 连接FTP服务器

                     // 如果采用默认端口,可以使用ftp.connect(host)的方式直接连接FTP服务器

                     ftp.login(username, password);// 登录

                     reply = ftp.getReplyCode();

                     if (!FTPReply.isPositiveCompletion(reply)) {

                            ftp.disconnect();

                            return result;

                     }

                     //切换到上传目录

                     if (!ftp.changeWorkingDirectory(basePath+filePath)) {

                            //如果目录不存在创建目录

                            String[] dirs = filePath.split("/");

                            String tempPath = basePath;

                            for (String dir : dirs) {

                                   if (null == dir || "".equals(dir)) continue;

                                   tempPath += "/" + dir;

                                   if (!ftp.changeWorkingDirectory(tempPath)) {

                                          if (!ftp.makeDirectory(tempPath)) {

                                                 return result;

                                          } else {

                                                 ftp.changeWorkingDirectory(tempPath);

                                          }

                                   }

                            }

                     }

                     //设置上传文件的类型为二进制类型

                     ftp.setFileType(FTP.BINARY_FILE_TYPE);

                     //上传文件

                     if (!ftp.storeFile(filename, input)) {

                            return result;

                     }

                     input.close();

                     ftp.logout();

                     result = true;

              } catch (IOException e) {

                     e.printStackTrace();

              } finally {

                     if (ftp.isConnected()) {

                            try {

                                   ftp.disconnect();

                            } catch (IOException ioe) {

                            }

                     }

              }

              return result;

       }

      

       /**

        * Description: 从FTP服务器下载文件

        * @param host 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 downloadFile(String host, int port, String username, String password, String remotePath,

                     String fileName, String localPath) {

              boolean result = false;

              FTPClient ftp = new FTPClient();

              try {

                     int reply;

                     ftp.connect(host, port);

                     // 如果采用默认端口,可以使用ftp.connect(host)的方式直接连接FTP服务器

                     ftp.login(username, password);// 登录

                     reply = ftp.getReplyCode();

                     if (!FTPReply.isPositiveCompletion(reply)) {

                            ftp.disconnect();

                            return result;

                     }

                     ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录

                     FTPFile[] fs = ftp.listFiles();

                     for (FTPFile ff : fs) {

                            if (ff.getName().equals(fileName)) {

                                   File localFile = new File(localPath + "/" + ff.getName());

 

                                   OutputStream is = new FileOutputStream(localFile);

                                   ftp.retrieveFile(ff.getName(), is);

                                   is.close();

                            }

                     }

 

                     ftp.logout();

                     result = true;

              } catch (IOException e) {

                     e.printStackTrace();

              } finally {

                     if (ftp.isConnected()) {

                            try {

                                   ftp.disconnect();

                            } catch (IOException ioe) {

                            }

                     }

              }

              return result;

       }

      

       public static void main(String[] args) {

              try { 

               FileInputStream in=new FileInputStream(new File("D:\\temp\\image\\gaigeming.jpg")); 

               boolean flag = uploadFile("192.168.25.133", 21, "ftpuser", "ftpuser", "/home/ftpuser/www/images","/2015/01/21", "gaigeming.jpg", in); 

               System.out.println(flag); 

           } catch (FileNotFoundException e) { 

               e.printStackTrace(); 

           } 

       }

}