用apache FTP client实现FTP客户端--支持断点续传和中文文件（转）

利用org.apache.commons.net.ftp包实现一个简单的ftp客户端实用类。主要实现一下功能

1.支持上传下载。支持断点续传

2.支持进度汇报

3.支持对于中文目录及中文文件创建的支持。

具体请看代码，上面有详细的注释。简化版本请参见http://zhouzaibao.iteye.com/blog/342766

 

枚举类UploadStatus代码

public enum UploadStatus {   
    Create_Directory_Fail,      //远程服务器相应目录创建失败   
    Create_Directory_Success,   //远程服务器闯将目录成功   
    Upload_New_File_Success,    //上传新文件成功   
    Upload_New_File_Failed,     //上传新文件失败   
    File_Exits,                 //文件已经存在   
    Remote_Bigger_Local,        //远程文件大于本地文件   
    Upload_From_Break_Success,  //断点续传成功   
    Upload_From_Break_Failed,   //断点续传失败   
    Delete_Remote_Faild;        //删除远程文件失败   
}

 枚举类DownloadStatus代码

public enum DownloadStatus {   
    Remote_File_Noexist,    //远程文件不存在   
    Local_Bigger_Remote,    //本地文件大于远程文件   
    Download_From_Break_Success,    //断点下载文件成功   
    Download_From_Break_Failed,     //断点下载文件失败   
    Download_New_Success,           //全新下载文件成功   
    Download_New_Failed;            //全新下载文件失败   
}

 

核心FTP代码

 

import java.io.File;   
import java.io.FileOutputStream;   
import java.io.IOException;   
import java.io.InputStream;   
import java.io.OutputStream;   
import java.io.PrintWriter;   
import java.io.RandomAccessFile;   
  
import open.mis.data.DownloadStatus;   
import open.mis.data.UploadStatus;    
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.FTPFile;   
import org.apache.commons.net.ftp.FTPReply;   
  
/**  
 * 支持断点续传的FTP实用类  
 * @author BenZhou  
 * @version 实现基本断点上传下载  
 * @version 实现上传下载进度汇报  
 * @version 实现中文目录创建及中文文件创建，添加对于中文的支持  
 */  
public class ContinueFTP {   
    public FTPClient ftpClient = new FTPClient();   
      
    public ContinueFTP(){   
        //设置将过程中使用到的命令输出到控制台   
        this.ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));   
    }   
       
    /**  
     * 连接到FTP服务器  
     * @param hostname 主机名  
     * @param port 端口  
     * @param username 用户名  
     * @param password 密码  
     * @return 是否连接成功  
     * @throws IOException  
     */  
    public boolean connect(String hostname,int port,String username,String password) throws IOException{   
        ftpClient.connect(hostname, port);   
        ftpClient.setControlEncoding("GBK");   
        if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){   
            if(ftpClient.login(username, password)){   
                return true;   
            }   
        }   
        disconnect();   
        return false;   
    }   
       
    /**  
     * 从FTP服务器上下载文件,支持断点续传，上传百分比汇报  
     * @param remote 远程文件路径  
     * @param local 本地文件路径  
     * @return 上传的状态  
     * @throws IOException  
     */  
    public DownloadStatus download(String remote,String local) throws IOException{   
        //设置被动模式   
        ftpClient.enterLocalPassiveMode();   
        //设置以二进制方式传输   
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);   
        DownloadStatus result;   
           
        //检查远程文件是否存在   
        FTPFile[] files = ftpClient.listFiles(new String(remote.getBytes("GBK"),"iso--));   
        if(files.length != {   
            System.out.println("远程文件不存在");   
            return DownloadStatus.Remote_File_Noexist;   
        }   
           
        long lRemoteSize = files[.getSize();   
        File f = new File(local);   
        //本地存在文件，进行断点下载   
        if(f.exists()){   
            long localSize = f.length();   
            //判断本地文件大小是否大于远程文件大小   
            if(localSize >= lRemoteSize){   
                System.out.println("本地文件大于远程文件，下载中止");   
                return DownloadStatus.Local_Bigger_Remote;   
            }   
               
            //进行断点续传，并记录状态   
            FileOutputStream out = new FileOutputStream(f,true);   
            ftpClient.setRestartOffset(localSize);   
            InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso--));   
            byte[] bytes = new byte[];   
            long step = lRemoteSize /   
            long process=localSize /step;   
            int c;   
            while((c = in.read(bytes))!= -{   
                out.write(bytes,c);   
                localSize+=c;   
                long nowProcess = localSize /step;   
                if(nowProcess > process){   
                    process = nowProcess;   
                    if(process %  ==    
                        System.out.println("下载进度："+process);   
                    //TODO 更新文件下载进度,值存放在process变量中   
                }   
            }   
            in.close();   
            out.close();   
            boolean isDo = ftpClient.completePendingCommand();   
            if(isDo){   
                result = DownloadStatus.Download_From_Break_Success;   
            }else {   
                result = DownloadStatus.Download_From_Break_Failed;   
            }   
        }else {   
            OutputStream out = new FileOutputStream(f);   
            InputStream in= ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso--));   
            byte[] bytes = new byte[];   
            long step = lRemoteSize /   
            long process=   
            long localSize = ;   
            int c;   
            while((c = in.read(bytes))!= -{   
                out.write(bytes,  c);   
                localSize+=c;   
                long nowProcess = localSize /step;   
                if(nowProcess > process){   
                    process = nowProcess;   
                    if(process %  ==    
                        System.out.println("下载进度："+process);   
                    //TODO 更新文件下载进度,值存放在process变量中   
                }   
            }   
            in.close();   
            out.close();   
            boolean upNewStatus = ftpClient.completePendingCommand();   
            if(upNewStatus){   
                result = DownloadStatus.Download_New_Success;   
            }else {   
                result = DownloadStatus.Download_New_Failed;   
            }   
        }   
        return result;   
    }   
       
    /**  
     * 上传文件到FTP服务器，支持断点续传  
     * @param local 本地文件名称，绝对路径  
     * @param remote 远程文件路径，使用/home/directorysubdirectory/file.ext 按照Linux上的路径指定方式，支持多级目录嵌套，支持递归创建不存在的目录结构  
     * @return 上传结果  
     * @throws IOException  
     */  
    public UploadStatus upload(String local,String remote) throws IOException{   
        //设置PassiveMode传输   
        ftpClient.enterLocalPassiveMode();   
        //设置以二进制流的方式传输   
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);   
        ftpClient.setControlEncoding("GBK");   
        UploadStatus result;   
        //对远程目录的处理   
        String remoteFileName = remote;   
        if(remote.contains("/")){   
            remoteFileName = remote.substring(remote.lastIndexOf("/")+;   
            //创建服务器远程目录结构，创建失败直接返回   
            if(CreateDirecroty(remote, ftpClient)==UploadStatus.Create_Directory_Fail){   
                return UploadStatus.Create_Directory_Fail;   
            }   
        }   
           
        //检查远程是否存在文件   
        FTPFile[] files = ftpClient.listFiles(new String(remoteFileName.getBytes("GBK"),"iso--));   
        if(files.length == {   
            long remoteSize = files[.getSize();   
            File f = new File(local);   
            long localSize = f.length();   
            if(remoteSize==localSize){   
                return UploadStatus.File_Exits;   
            }else if(remoteSize > localSize){   
                return UploadStatus.Remote_Bigger_Local;   
            }   
               
            //尝试移动文件内读取指针,实现断点续传   
            result = uploadFile(remoteFileName, f, ftpClient, remoteSize);   
               
            //如果断点续传没有成功，则删除服务器上文件，重新上传   
            if(result == UploadStatus.Upload_From_Break_Failed){   
                if(!ftpClient.deleteFile(remoteFileName)){   
                    return UploadStatus.Delete_Remote_Faild;   
                }   
                result = uploadFile(remoteFileName, f, ftpClient, ;   
            }   
        }else {   
            result = uploadFile(remoteFileName, new File(local), ftpClient, ;   
        }   
        return result;   
    }   
    /**  
     * 断开与远程服务器的连接  
     * @throws IOException  
     */  
    public void disconnect() throws IOException{   
        if(ftpClient.isConnected()){   
            ftpClient.disconnect();   
        }   
    }   
       
    /**  
     * 递归创建远程服务器目录  
     * @param remote 远程服务器文件绝对路径  
     * @param ftpClient FTPClient对象  
     * @return 目录创建是否成功  
     * @throws IOException  
     */  
    public UploadStatus CreateDirecroty(String remote,FTPClient ftpClient) throws IOException{   
        UploadStatus status = UploadStatus.Create_Directory_Success;   
        String directory = remote.substring(remote.lastIndexOf("/")+;   
        if(!directory.equalsIgnoreCase("/")&&!ftpClient.changeWorkingDirectory(new String(directory.getBytes("GBK"),"iso--))){   
            //如果远程目录不存在，则递归创建远程服务器目录   
            int start=   
            int end =    
            if(directory.startsWith("/")){   
                start =    
            }else{   
                start =    
            }   
            end = directory.indexOf("/",start);   
            while(true){   
                String subDirectory = new String(remote.substring(start,end).getBytes("GBK"),"iso--);   
                if(!ftpClient.changeWorkingDirectory(subDirectory)){   
                    if(ftpClient.makeDirectory(subDirectory)){   
                        ftpClient.changeWorkingDirectory(subDirectory);   
                    }else {   
                        System.out.println("创建目录失败");   
                        return UploadStatus.Create_Directory_Fail;   
                    }   
                }   
                   
                start = end +    
                end = directory.indexOf("/",start);   
                   
                //检查所有目录是否创建完毕   
                if(end <= start){   
                    break;   
                }   
            }   
        }   
        return status;   
    }   
       
    /**  
     * 上传文件到服务器,新上传和断点续传  
     * @param remoteFile 远程文件名，在上传之前已经将服务器工作目录做了改变  
     * @param localFile 本地文件File句柄，绝对路径  
     * @param processStep 需要显示的处理进度步进值  
     * @param ftpClient FTPClient引用  
     * @return  
     * @throws IOException  
     */  
    public UploadStatus uploadFile(String remoteFile,File localFile,FTPClient ftpClient,long remoteSize) throws IOException{   
        UploadStatus status;   
        //显示进度的上传   
        long step = localFile.length() /    
        long process =    
        long localreadbytes = ;   
        RandomAccessFile raf = new RandomAccessFile(localFile,"r");   
        OutputStream out = ftpClient.appendFileStream(new String(remoteFile.getBytes("GBK"),"iso--));   
        //断点续传   
        if(remoteSize>{   
            ftpClient.setRestartOffset(remoteSize);   
            process = remoteSize /step;   
            raf.seek(remoteSize);   
            localreadbytes = remoteSize;   
        }   
        byte[] bytes = new byte[];   
        int c;   
        while((c = raf.read(bytes))!= -{   
            out.write(bytes,c);   
            localreadbytes+=c;   
            if(localreadbytes / step != process){   
                process = localreadbytes / step;   
                System.out.println("上传进度:" + process);   
                //TODO 汇报上传状态   
            }   
        }   
        out.flush();   
        raf.close();   
        out.close();   
        boolean result =ftpClient.completePendingCommand();   
        if(remoteSize > {   
            status = result?UploadStatus.Upload_From_Break_Success:UploadStatus.Upload_From_Break_Failed;   
        }else {   
            status = result?UploadStatus.Upload_New_File_Success:UploadStatus.Upload_New_File_Failed;   
        }   
        return status;   
    }   
       
    public static void main(String[] args) {   
        ContinueFTP myFtp = new ContinueFTP();   
        try {   
            myFtp.connect("., , "nid", ");   
//          myFtp.ftpClient.makeDirectory(new String("电视剧".getBytes("GBK"),"iso--));   
//          myFtp.ftpClient.changeWorkingDirectory(new String("电视剧".getBytes("GBK"),"iso--));   
//          myFtp.ftpClient.makeDirectory(new String("走西口".getBytes("GBK"),"iso--));   
//          System.out.println(myFtp.upload("E:\\yw.flv", "/yw.flv",);   
//          System.out.println(myFtp.upload("E:\\走西口.mp,"/央视走西口/新浪网/走西口.mp));   
            System.out.println(myFtp.download("/央视走西口/新浪网/走西口.mp, "E:\\走西口mp));   
            myFtp.disconnect();   
        } catch (IOException e) {   
            System.out.println("连接FTP出错："+e.getMessage());   
        }   
    }   
}