Java实现ftp上传文件、文件夹

    import java.io.File;  
    import java.io.FileInputStream;  
    import org.apache.commons.net.ftp.FTPClient;  
    import org.apache.commons.net.ftp.FTPReply;  
      
    public class test {    
         
        private  FTPClient ftp;    
        /** 
         *  
         * @param path 上传到ftp服务器哪个路径下    
         * @param addr 地址 
         * @param port 端口号 
         * @param username 用户名 
         * @param password 密码 
         * @return 
         * @throws Exception 
         */  
        private  boolean connect(String path,String addr,int port,String username,String password) throws Exception {    
            boolean result = false;    
            ftp = new FTPClient();    
            int reply;    
            ftp.connect(addr,port);    
            ftp.login(username,password);    
            ftp.setFileType(FTPClient.BINARY_FILE_TYPE);    
            reply = ftp.getReplyCode();    
            if (!FTPReply.isPositiveCompletion(reply)) {    
                ftp.disconnect();    
                return result;    
            }    
            ftp.changeWorkingDirectory(path);    
            result = true;    
            return result;    
        }    
        /** 
         *  
         * @param file 上传的文件或文件夹 
         * @throws Exception 
         */  
        private void upload(File file) throws Exception{    
            if(file.isDirectory()){         
                ftp.makeDirectory(file.getName());              
                ftp.changeWorkingDirectory(file.getName());    
                String[] files = file.list();           
                for (int i = 0; i < files.length; i++) {    
                    File file1 = new File(file.getPath()+"\"+files[i] );    
                    if(file1.isDirectory()){    
                        upload(file1);    
                        ftp.changeToParentDirectory();    
                    }else{                  
                        File file2 = new File(file.getPath()+"\"+files[i]);    
                        FileInputStream input = new FileInputStream(file2);    
                        ftp.storeFile(file2.getName(), input);    
                        input.close();                          
                    }               
                }    
            }else{    
                File file2 = new File(file.getPath());    
                FileInputStream input = new FileInputStream(file2);    
                ftp.storeFile(file2.getName(), input);    
                input.close();      
            }    
        }    
       public static void main(String[] args) throws Exception{  
          test t = new test();  
          t.connect("", "localhost", 21, "yhh", "yhhazr");  
          File file = new File("e:\uploadify");  
          t.upload(file);  
       }  
    }  

其中port：21是默认端口，可以不写