SFTP文件下载和上传

工具类-- SFTP文件下载和上传
下载功能–下载到本地文件夹中,并将SFTP文件删除备份到备份文件夹中.
上传功能–就是上传.

package com.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Iterator;
import java.util.Vector;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;
import com.jcraft.jsch.UserInfo;

/** 
 * SFTP工具类
 */
public class SFTPUtils{
	private static final Logger	log  =  LoggerFactory.getLogger(SFTPUtils.class);

	/**
	 * 上传数据信息到SFTP
	 * @param  host 
	 * @param  port 端口号
	 * @param  userName 用户名
	 * @param  password 密码
	 * @param  keyFile	密钥
	 * @param  filePath	文件路径
	 * @param  remoteAbsolutePath	远程路径
	 * @param @throws IOException
	 */
	public static boolean uploadSFTP(String host,String port,String userName,String password,String keyFile,String filePath,String remoteAbsolutePath) throws IOException{
		JSch jsch = new JSch();
		try {
			String resource = SFTPUtils.class.getResource("/")+keyFile;	
			String keyFilePath = resource.replace("file:", "");
			jsch.addIdentity(keyFilePath);
			Session sesison = jsch.getSession(userName, host ,Integer.parseInt(port));
			UserInfo info = new MyUserInfo(password);
			sesison.setUserInfo(info);
			sesison.connect();
			
			Channel channel = sesison.openChannel("sftp");
		    channel.connect();
		    ChannelSftp sftp = (ChannelSftp) channel;
		    try {
				//sftp.mkdir("/nike/test");
				sftp.put(filePath, remoteAbsolutePath);
				//sftp.put(new FileInputStream(new File(filePath)), remoteAbsolutePath);
			} catch (SftpException e) {
				log.error("上传数据失败,报错原因为 "+e);
				return false;
			}finally{
				//退出
				sftp.disconnect();
			}
		} catch (JSchException e) {
			e.printStackTrace();
			return false;
		}finally{
			try {
                File tempFile = new File(filePath);
                if(tempFile!=null)
    				tempFile.delete();
            } catch (Exception e) {
                e.printStackTrace();
            }
		}
		return true;
	}

    	
	public static class MyUserInfo implements UserInfo {
		private String passPhrase;
		

		public MyUserInfo(String passPhrase) {
			super();
			this.passPhrase = passPhrase;
		}

		@Override
		public String getPassphrase() {
			// TODO Auto-generated method stub
			return passPhrase;
		}

		@Override
		public String getPassword() {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public boolean promptPassword(String message) {
			// TODO Auto-generated method stub
			return true;
		}

		@Override
		public boolean promptPassphrase(String message) {
			// TODO Auto-generated method stub
			return true;
		}

		@Override
		public boolean promptYesNo(String message) {
			// TODO Auto-generated method stub
			return true;
		}

		@Override
		public void showMessage(String message) {
			//System.out.println(message);
		}
		
	}

	/**
	 * SFTP下载数据到临时文件夹，并备份文件到SFTP备份文件夹中.
	 * @param  host
	 * @param  port 端口号
	 * @param  userName 用户名
	 * @param  password 密码
	 * @param  keyFile	密钥
	 * @param  localFilePath	本地临时文件路径
	 * @param  remoteAbsolutePath	 远程路径
	 * @param  remoteBakPath 远程备份路径
	 * @Author 楚长川
	 */
	public static boolean downloadSFTP(String host,String port,String userName,String password,String keyFile,String localFilePath	,String remoteAbsolutePath,String remoteBakPath) throws IOException{
		JSch jsch = new JSch();
		try {
			String resource = String.valueOf(Thread.currentThread().getContextClassLoader().getResource(keyFile));
            String keyFilePath = resource.replace("file:", "");
			jsch.addIdentity(keyFilePath);
			Session sesison = jsch.getSession(userName, host ,Integer.parseInt(port));
			UserInfo info = new MyUserInfo(password);
			sesison.setUserInfo(info);
			sesison.connect();

			Channel channel = sesison.openChannel("sftp");
			channel.connect();
			ChannelSftp sftp = (ChannelSftp) channel;
			try {
                Vector sftpFiles = sftp.ls(remoteAbsolutePath);
                if(sftpFiles.size()>0){
                    Iterator sftpIts = sftpFiles.iterator();
                    while(sftpIts.hasNext()){
                        ChannelSftp.LsEntry entry = (ChannelSftp.LsEntry)sftpIts.next();
						String filename = entry.getFilename();
						if(filename.equals("..")||filename.equals(".")) {
                            continue;
                        }
						sftp.get(remoteAbsolutePath + filename, localFilePath);
						//下载完成后,将下载文件上传至备份文件夹
						sftp.put(localFilePath	+ File.separator + filename, remoteBakPath);
						//删除读取文件,防止二次读取
						sftp.rm(remoteAbsolutePath+filename);
                    }
                }
            } catch (SftpException e) {
				log.error("下载数据失败,报错原因为 "+e);
				return false;
			}finally{
				//退出
				sftp.disconnect();
			}
		} catch (JSchException e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
}