JAVA连接SFTP服务

private ChannelSftp sftp;
    private Session session;
    /***
     * 连接sftp客户端
     * @param ip
     * @param port
     * @param userName
     * @param password
     * @return
     */
    public LoadFtp(String ip,int port,String userName,String password){
        JSch jsch = new JSch();
        try {
            session=jsch.getSession(userName,ip,port);
            session.setPassword(password);
            Properties config=new Properties ();
            config.setProperty("StrictHostKeyChecking","no");
            session.setConfig(config);
            session.connect();

            Channel channel = session.openChannel("sftp");
            channel.connect();

            sftp= (ChannelSftp) channel;
            logger.info("sftp is connect ip {} success",session);
        } catch (JSchException e) {
            logger.info("sftp is error {}",e);
            e.printStackTrace();
        }
    }

    /**
     * sftp读取目录，按关键字获取文件名或者路径
     * @param dir
     * @param fileName
     * @return
     */
    public Vector readPath(String dir,String fileName){
        Vector vr=null;
        try {
            vr=sftp.ls(dir+fileName);
            for (Object object:vr
                ) {
                ChannelSftp.LsEntry dirName= (ChannelSftp.LsEntry) object;
            }
            logger.info("dir path is content {}",vr.toArray().toString());
        } catch (SftpException e) {
            logger.error("readPath is error {}",e);
            e.printStackTrace();
        }
        return vr;
    }

    /**
     * 关闭sftp连接
     */
    public void logout(){
        if (sftp !=null){
            sftp.disconnect();
        }

        if (session!=null){
            session.disconnect();
        }
    }