ftp 递归下载文件下载过了就不在下载了代码,Java代码库,德仔网

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【Java】 ftp 递归下载文件下载过了就不在下载了
作者:瑞琪 / 发布于2017/2/6/ 410
package com.bailiangroup.bigdata.utils;  
  
import java.io.IOException;  
import java.net.SocketException;  
import org.apache.commons.logging.Log;  
import org.apache.commons.logging.LogFactory;  
import org.apache.commons.net.ftp.FTPClient;  
import org.apache.commons.net.ftp.FTPReply;  
  
public class FTPUtil{  
    private static  Log logger = LogFactory.getLog(FTPUtil.class);  
    public static FTPClient getFTPClient(String ftpHost, String ftpUserName,String ftpPassword, int ftpPort) {    
        FTPClient ftpClient = null;    
        try {    
            ftpClient = new FTPClient();    
            ftpClient.connect(ftpHost, ftpPort);// 连接FTP服务器    
            ftpClient.login(ftpUserName, ftpPassword);// 登陆FTP服务器    
            if (!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {    
                logger.info("未连接到FTP，用户名或密码错误。");    
                ftpClient.disconnect();    
            } else {    
                logger.info("FTP连接成功。");    
            }    
        } catch (SocketException e) {    
            e.printStackTrace();    
            logger.info("FTP的IP地址可能错误，请正确配置。");    
        } catch (IOException e) {    
            e.printStackTrace();    
            logger.info("FTP的端口错误,请正确配置。");    
        }    
        return ftpClient;    
    }    
}  

package com.bailiangroup.bigdata.utils;  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.OutputStream;  
import java.util.List;  
  
import org.apache.commons.logging.Log;  
import org.apache.commons.logging.LogFactory;  
import org.apache.commons.net.ftp.FTPClient;  
import org.apache.commons.net.ftp.FTPFile;  
  
public class FtpFileDownloadUtil{  
    private static Log log = LogFactory.getLog(FtpFileDownloadUtil.class);  
    private String ftpHost;  
    private String ftpUserName;  
    private String ftpPassword;  
    private int ftpPort;  
    private String remotePath;  
    private String localPath;  
    private String fileName;  
    FTPClient ftpClient = null;  
  
    public FtpFileDownloadUtil( String ftpHost, String ftpUserName, String ftpPassword, int ftpPort,String remotePath,String localPath){  
        this.ftpHost = ftpHost;  
        this.ftpUserName = ftpUserName;  
        this.ftpPassword = ftpPassword;  
        this.ftpPort = ftpPort;  
        this.remotePath = remotePath;  
        this.localPath = localPath;  
    }  
      
      
    public  void download(){  
        try {  
            //获得ftp连接  
            ftpClient = FTPUtil.getFTPClient(ftpHost, ftpUserName, ftpPassword, ftpPort);  
            if (ftpClient == null) {  
                log.error("连接远程ftp服务失败");  
                return;  
            }  
            ftpClient.enterLocalPassiveMode();  
            ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);  
            //从ftp中下载远程目录文件  
            downLoadFile(ftpClient, remotePath, localPath);  
              
              
        }catch(Exception e){  
              
        }finally{  
            //关闭ftp  
            if (ftpClient != null && ftpClient.isConnected()) {  
                try {  
                    ftpClient.disconnect();  
                } catch (IOException e) {  
                }  
            }  
              
              
        }  
    }  
      
      
  
    /**   
        * 递归下载文件   
        *    
        * @param ftp   
        * @param remote   
        * @param local   
        *    
        */    
          
       private void downLoadFile(FTPClient ftp, String remote, String local)    
       {    
             
           try    
           {    
        
               // 转到指定下载目录    
                
               ftp.changeWorkingDirectory(remote);   
               //System.out.println("remote:" +remote);  
  
               FTPFile[] files = ftp.listFiles();   
                 
               for (FTPFile file : files)    
               {    
                  // System.out.println(file.getName());  
                 //if(file.getName().contains("2015-11-24")){  
                         
                       if (file.isDirectory())  
                       {    
                           downLoadFile(ftp, remote + file.getName() + "/", local + "/" + file.getName() + "/");  
                       }    
                       else    
                       {    
                             
                           File localFile = new File(local +  File.separator + file.getName());    
                             
                           if (!localFile.getParentFile().exists())    
                           {    
                               localFile.getParentFile().mkdirs();   
                           }   
                             
                          if(!localFile.exists()){  
                                
                              OutputStream is = new FileOutputStream(localFile);    
                              // 下载文件    
                              ftp.retrieveFile(file.getName(), is);    
                              is.close();    
                          }  
                             
    
                       }    
                   }  
                     
                     
                     
              // }    
        
           }    
           catch (Exception e)    
           {    
               e.printStackTrace();    
           }    
        
       }    
       
  
  
  
        public String getFtpHost() {  
            return ftpHost;  
        }  
  
  
        public void setFtpHost(String ftpHost) {  
            this.ftpHost = ftpHost;  
        }  
  
  
        public String getFtpUserName() {  
            return ftpUserName;  
        }  
  
  
        public void setFtpUserName(String ftpUserName) {  
            this.ftpUserName = ftpUserName;  
        }  
  
  
        public String getFtpPassword() {  
            return ftpPassword;  
        }  
  
  
        public void setFtpPassword(String ftpPassword) {  
            this.ftpPassword = ftpPassword;  
        }  
  
  
        public int getFtpPort() {  
            return ftpPort;  
        }  
  
  
        public void setFtpPort(int ftpPort) {  
            this.ftpPort = ftpPort;  
        }  
  
  
        public String getRemotePath() {  
            return remotePath;  
        }  
  
  
        public void setRemotePath(String remotePath) {  
            this.remotePath = remotePath;  
        }  
  
  
          
  
  
        public String getLocalPath() {  
            return localPath;  
        }  
  
  
        public void setLocalPath(String localPath) {  
            this.localPath = localPath;  
        }  
  
  
        public String getFileName() {  
            return fileName;  
        }  
  
  
        public void setFileName(String fileName) {  
            this.fileName = fileName;  
        }  
  
  
        public FTPClient getFtpClient() {  
            return ftpClient;  
        }  
  
  
        public void setFtpClient(FTPClient ftpClient) {  
            this.ftpClient = ftpClient;  
        }  
  
  
      
      
      
}
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