Java读取Linux上文件

public void readFile() {
    //创建远程连接，默认连接端口为22，如果不使用默认，可以使用方法
    //new Connection(ip, port)创建对象
    String ip = "";
    String usr = "";
    String pwd = "";
    //int     port=22;
    Connection conn = null;
    String date = "";
    String path="";
    try {
        //连接远程服务器
        // 连接部署服务器
        conn = new Connection(ip);
        conn.connect();
        //使用用户名和密码登录
        boolean b = conn.authenticateWithPassword(usr, pwd);
        if (!b) {
            throw new IOException("Authentication failed.");
        } else {
            SFTPv3Client sft = new SFTPv3Client(conn);
            Vector<?> v = sft.ls("path");
            for (int i = 0; i < v.size(); i++) {
                SFTPv3DirectoryEntry s = new SFTPv3DirectoryEntry();
                s = (SFTPv3DirectoryEntry) v.get(i);
                //文件名
                String filename = s.filename;
                if (filename.length() > 17) {
                    String substring = filename.substring(7, 17);
                    if (substring.equals(date)) {
                        System.out.println(filename);

                        Session ss=null;
                        ss=conn.openSession();
                        ss.execCommand("cat ".concat("path"+filename));
                        InputStream    is = new StreamGobbler(ss.getStdout());
                        BufferedReader bs = new BufferedReader(new InputStreamReader(is));
                        while(true){
                            String line = bs.readLine();
                            if(line==null){
                                break;
                            }else{
                                System.out.println("abc........................"+line);
                            }
                        }
                        bs.close();
                        ss.close();
                        conn.close();
                    }
                }
            }

        }
    } catch (IOException e) {
        System.err.printf("用户%s密码%s登录服务器%s失败！", usr, pwd, ip);
        e.printStackTrace();
    }

}