基于commons-net实现ftp创建文件夹、上传、下载功能.，commons-netftp,基于commons-ne

基于commons-net实现ftp创建文件夹、上传、下载功能.，commons-netftp,基于commons-ne

基于commons-net实现ftp创建文件夹、上传、下载功能.FtpClientUtil```java package com.demo.ftp;

import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.IOException;  import java.io.InputStream;  import java.io.OutputStream;  import java.io.PrintWriter;  import java.net.ConnectException;import org.apache.commons.net.PrintCommandListener;  import org.apache.commons.net.ftp.FTP;  import org.apache.commons.net.ftp.FTPClient;  import org.apache.commons.net.ftp.FTPReply;/**  * @author wobendiankun 2015-1-8 下午08:11:08  */  public class FtpClientUtil {      /**      * ftp服务器地址      */      private  String server;      /**      * 端口      */      private  int port;      /**      * 用户名      */      private  String username;      /**      *       */      private  String password;    public FtpClientUtil () {          server = "localhost";          port = 21;          username = "kun";          password = "111111";      }    public FtpClientUtil(String server, int port, String username,              String password) {          this.server = server;          this.port = port;          this.username = username;          this.password = password;      }      /**上传文件      * @param remoteFileName 远程文件名称      * @param locaFileName 本地文件名称      */      public void upload(String remoteFileName,String locaFileName){          FTPClient ftp=null;           try {              ftp = new FTPClient();              ftp.addProtocolCommandListener( new PrintCommandListener( new PrintWriter( System.out ), true ) );              //连接ftp服务器              connect( ftp );              //设置属性              setProperty( ftp );              //上传文件              upload( ftp, remoteFileName, locaFileName );              //退出              logout( ftp );          } catch (Exception e) {              e.printStackTrace();          }finally {              if (ftp.isConnected()) {                  try {                      ftp.disconnect();                  } catch (IOException f) {                  }              }          }    }      /**上传文件      * @param remoteFileName 远程文件名称      * @param locaFileName 本地文件名称      */      public void download(String remoteFileName,String locaFileName){          FTPClient ftp=null;           try {              ftp = new FTPClient();              ftp.addProtocolCommandListener( new PrintCommandListener( new PrintWriter( System.out ), true ) );              //连接ftp服务器              connect( ftp );              //设置属性              setProperty( ftp );              //下载文件              download( ftp, remoteFileName, locaFileName );              //退出              logout( ftp );          } catch (Exception e) {              e.printStackTrace();          }finally {              if (ftp.isConnected()) {                  try {                      ftp.disconnect();                  } catch (IOException f) {                  }              }          }      }      /**创建文件夹      * @param remotePathName 远程文件夹名称      */      public void mkdir(String remotePathName) {          FTPClient ftp=null;           try {              ftp = new FTPClient();              ftp.addProtocolCommandListener( new PrintCommandListener( new PrintWriter( System.out ), true ) );              //连接ftp服务器              connect( ftp );              //设置属性              setProperty( ftp );              //创建文件夹              mkdir( ftp, remotePathName);              //退出              logout( ftp );          } catch (Exception e) {              e.printStackTrace();          }finally {              if (ftp.isConnected()) {                  try {                      ftp.disconnect();                  } catch (IOException f) {                  }              }          }      }      /**      * @param ftp      * @param remotePathName      */      private void mkdir(FTPClient ftp, String remotePathName) throws Exception{          ftp.makeDirectory(remotePathName);      }    /**      * @param ftp      * @param remoteFileName      * @param locaFileName      */      private void download(FTPClient ftp, String remoteFileName,              String locaFileName) throws Exception{          OutputStream output=null;          output = new FileOutputStream(locaFileName);          ftp.retrieveFile(remoteFileName, output);           output.close();      }    /**      * @param ftp      * @throws Exception       */      private void setProperty(FTPClient ftp) throws Exception {          ftp.enterLocalPassiveMode();          //二进制传输,默认为ASCII          ftp.setFileType(FTP.BINARY_FILE_TYPE);      }    /**      * @param ftp      */      private void logout(FTPClient ftp) throws Exception{          ftp.noop();          ftp.logout();      }    /**      * @param ftp      * @param remoteFileName      * @param locaFileName      */      private void upload(FTPClient ftp, String remoteFileName,              String locaFileName) throws Exception{          //上传          InputStream input;        input = new FileInputStream(locaFileName);        ftp.storeFile(remoteFileName, input);        input.close();      }    /**      * @param ftp      */      private void connect(FTPClient ftp) throws Exception{          //连接服务器          ftp.connect( server, port);          int reply = ftp.getReplyCode();          //是否连接成功          if ( !FTPReply.isPositiveCompletion( reply ) )         {              throw new ConnectException( server+" 服务器拒绝连接" );          }          //登陆          if (!ftp.login(username, password)) {               throw new ConnectException( "用户名或密码错误" );          }      }  }

FtpTest```java    package com.demo.ftp;      /**      * @author wobendiankun 2015-1-8 下午08:34:36      */      public class FtpTest {          public static void main(String[] args) {              //上传文件              //upload();              //下载文件              //download();              //创建文件夹              mkdir();          }          /**          *           */          private static void mkdir() {              FtpClientUtil clientUtil=new FtpClientUtil();              clientUtil.mkdir("test");          }          /**          *           */          private static void download() {              String remoteFileName="./111.txt";              String locaFileName="F:\\test\\txt\\3333.txt";              FtpClientUtil clientUtil=new FtpClientUtil();              clientUtil.download(remoteFileName, locaFileName);          }          /**          *           */          private static void upload() {              String remoteFileName="./111.txt";              String locaFileName="F:\\test\\txt\\aaa.txt";              FtpClientUtil clientUtil=new FtpClientUtil();              clientUtil.upload(remoteFileName, locaFileName);          }      }