JAVASFTP文件上传、下载及批量下载实例

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.Vector;
import org.apache.log4j.Logger;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpATTRS;
import com.jcraft.jsch.SftpException;
import com.jcraft.jsch.ChannelSftp.LsEntry;
/**
 * sftp工具类
 * 
 * @author xxx
 * @date 2014-6-17
 * @time 下午1:39:44
 * @version 1.0
 */
public class SFTPUtils
{
  private static Logger log = Logger.getLogger(SFTPUtils.class.getName());

  private String host;//服务器连接ip
  private String username;//用户名
  private String password;//密码
  private int port = 22;//端口号
  private ChannelSftp sftp = null;
  private Session sshSession = null;

  public SFTPUtils(){}

  public SFTPUtils(String host, int port, String username, String password)
  {
    this.host = host;
    this.username = username;
    this.password = password;
    this.port = port;
  }

  public SFTPUtils(String host, String username, String password)
  {
    this.host = host;
    this.username = username;
    this.password = password;
  }

  /**
   * 通过SFTP连接服务器
   */
  public void connect()
  {
    try
    {
      JSch jsch = new JSch();
      jsch.getSession(username, host, port);
      sshSession = jsch.getSession(username, host, port);
      if (log.isInfoEnabled())
      {
        log.info("Session created.");
      }
      sshSession.setPassword(password);
      Properties sshCOnfig= new Properties();
      sshConfig.put("StrictHostKeyChecking", "no");
      sshSession.setConfig(sshConfig);
      sshSession.connect();
      if (log.isInfoEnabled())
      {
        log.info("Session connected.");
      }
      Channel channel = sshSession.openChannel("sftp");
      channel.connect();
      if (log.isInfoEnabled())
      {
        log.info("Opening Channel.");
      }
      sftp = (ChannelSftp) channel;
      if (log.isInfoEnabled())
      {
        log.info("Connected to " + host + ".");
      }
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  /**
   * 关闭连接
   */
  public void disconnect()
  {
    if (this.sftp != null)
    {
      if (this.sftp.isConnected())
      {
        this.sftp.disconnect();
        if (log.isInfoEnabled())
        {
          log.info("sftp is closed already");
        }
      }
    }
    if (this.sshSession != null)
    {
      if (this.sshSession.isConnected())
      {
        this.sshSession.disconnect();
        if (log.isInfoEnabled())
        {
          log.info("sshSession is closed already");
        }
      }
    }
  }

  /**
   * 批量下载文件
   * @param remotPath：远程下载目录(以路径符号结束,可以为相对路径eg:/assess/sftp/jiesuan_2/2014/)
   * @param localPath：本地保存目录(以路径符号结束,D:\Duansha\sftp\)
   * @param fileFormat：下载文件格式(以特定字符开头,为空不做检验)
   * @param fileEndFormat：下载文件格式(文件格式)
   * @param del：下载后是否删除sftp文件
   * @return
   */
  public List batchDownLoadFile(String remotePath, String localPath,
      String fileFormat, String fileEndFormat, boolean del)
  {
    List filenames = new ArrayList();
    try
    {
      // connect();
      Vector v = listFiles(remotePath);
      // sftp.cd(remotePath);
      if (v.size() > 0)
      {
        System.out.println("本次处理文件个数不为零,开始下载...fileSize=" + v.size());
        Iterator it = v.iterator();
        while (it.hasNext())
        {
          LsEntry entry = (LsEntry) it.next();
          String filename = entry.getFilename();
          SftpATTRS attrs = entry.getAttrs();
          if (!attrs.isDir())
          {
            boolean flag = false;
            String localFileName = localPath + filename;
            fileFormat = fileFormat == null &＃63; "" : fileFormat
                .trim();
            fileEndFormat = fileEndFormat == null &＃63; ""
                : fileEndFormat.trim();
            // 三种情况
            if (fileFormat.length() > 0 && fileEndFormat.length() > 0)
            {
              if (filename.startsWith(fileFormat) && filename.endsWith(fileEndFormat))
              {
                flag = downloadFile(remotePath, filename,localPath, filename);
                if (flag)
                {
                  filenames.add(localFileName);
                  if (flag && del)
                  {
                    deleteSFTP(remotePath, filename);
                  }
                }
              }
            }
            else if (fileFormat.length() > 0 && "".equals(fileEndFormat))
            {
              if (filename.startsWith(fileFormat))
              {
                flag = downloadFile(remotePath, filename, localPath, filename);
                if (flag)
                {
                  filenames.add(localFileName);
                  if (flag && del)
                  {
                    deleteSFTP(remotePath, filename);
                  }
                }
              }
            }
            else if (fileEndFormat.length() > 0 && "".equals(fileFormat))
            {
              if (filename.endsWith(fileEndFormat))
              {
                flag = downloadFile(remotePath, filename,localPath, filename);
                if (flag)
                {
                  filenames.add(localFileName);
                  if (flag && del)
                  {
                    deleteSFTP(remotePath, filename);
                  }
                }
              }
            }
            else
            {
              flag = downloadFile(remotePath, filename,localPath, filename);
              if (flag)
              {
                filenames.add(localFileName);
                if (flag && del)
                {
                  deleteSFTP(remotePath, filename);
                }
              }
            }
          }
        }
      }
      if (log.isInfoEnabled())
      {
        log.info("download file is success:remotePath=" + remotePath
            + "and localPath=" + localPath + ",file size is"
            + v.size());
      }
    }
    catch (SftpException e)
    {
      e.printStackTrace();
    }
    finally
    {
      // this.disconnect();
    }
    return filenames;
  }

  /**
   * 下载单个文件
   * @param remotPath：远程下载目录(以路径符号结束)
   * @param remoteFileName：下载文件名
   * @param localPath：本地保存目录(以路径符号结束)
   * @param localFileName：保存文件名
   * @return
   */
  public boolean downloadFile(String remotePath, String remoteFileName,String localPath, String localFileName)
  {
    FileOutputStream fieloutput = null;
    try
    {
      // sftp.cd(remotePath);
      File file = new File(localPath + localFileName);
      // mkdirs(localPath + localFileName);
      fieloutput = new FileOutputStream(file);
      sftp.get(remotePath + remoteFileName, fieloutput);
      if (log.isInfoEnabled())
      {
        log.info("===DownloadFile:" + remoteFileName + " success from sftp.");
      }
      return true;
    }
    catch (FileNotFoundException e)
    {
      e.printStackTrace();
    }
    catch (SftpException e)
    {
      e.printStackTrace();
    }
    finally
    {
      if (null != fieloutput)
      {
        try
        {
          fieloutput.close();
        }
        catch (IOException e)
        {
          e.printStackTrace();
        }
      }
    }
    return false;
  }

  /**
   * 上传单个文件
   * @param remotePath：远程保存目录
   * @param remoteFileName：保存文件名
   * @param localPath：本地上传目录(以路径符号结束)
   * @param localFileName：上传的文件名
   * @return
   */
  public boolean uploadFile(String remotePath, String remoteFileName,String localPath, String localFileName)
  {
    FileInputStream in = null;
    try
    {
      createDir(remotePath);
      File file = new File(localPath + localFileName);
      in = new FileInputStream(file);
      sftp.put(in, remoteFileName);
      return true;
    }
    catch (FileNotFoundException e)
    {
      e.printStackTrace();
    }
    catch (SftpException e)
    {
      e.printStackTrace();
    }
    finally
    {
      if (in != null)
      {
        try
        {
          in.close();
        }
        catch (IOException e)
        {
          e.printStackTrace();
        }
      }
    }
    return false;
  }

  /**
   * 批量上传文件
   * @param remotePath：远程保存目录
   * @param localPath：本地上传目录(以路径符号结束)
   * @param del：上传后是否删除本地文件
   * @return
   */
  public boolean bacthUploadFile(String remotePath, String localPath,
      boolean del)
  {
    try
    {
      connect();
      File file = new File(localPath);
      File[] files = file.listFiles();
      for (int i = 0; i  filePathList = new ArrayList();
    try
    {
      sftp = new SFTPUtils("10.163.201.115", "tdcp", "tdcp");
      sftp.connect();
      // 下载
      sftp.batchDownLoadFile(sftpPath, localPath, "ASSESS", ".txt", true);
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    finally
    {
      sftp.disconnect();
    }
  }
}

/**
 * 时间处理工具类（简单的）
 * @author Aaron
 * @date 2014-6-17
 * @time 下午1:39:44
 * @version 1.0
 */
public class DateUtil {
   /**
   * 默认时间字符串的格式
   */
  public static final String DEFAULT_FORMAT_STR = "yyyyMMddHHmmss";
  
  public static final String DATE_FORMAT_STR = "yyyyMMdd";
  
  /**
   * 获取系统时间的昨天
   * @return
   */
  public static String getSysTime(){
     Calendar ca = Calendar.getInstance();  
     ca.set(Calendar.DATE, ca.get(Calendar.DATE)-1);
     Date d = ca.getTime();
     SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
     String a = sdf.format(d);
    return a;
  }
  
  /**
   * 获取当前时间
   * @param date
   * @return
   */
  public static String getCurrentDate(String formatStr)
  {
    if (null == formatStr)
    {
      formatStr=DEFAULT_FORMAT_STR;
    }
    return date2String(new Date(), formatStr);
  }
  
  /**
   * 返回年月日
   * @return yyyyMMdd
   */
  public static String getTodayChar8(String dateFormat){
    return DateFormatUtils.format(new Date(), dateFormat);
  }
  
  /**
   * 将Date日期转换为String
   * @param date
   * @param formatStr
   * @return
   */
  public static String date2String(Date date, String formatStr)
  {
    if (null == date || null == formatStr)
    {
      return "";
    }
    SimpleDateFormat df = new SimpleDateFormat(formatStr);

    return df.format(date);
  }
}