/**  *实现服务器连接  * @param host  * @param port  * @param username  * @param password  * @param privateKeyFile  * @return  * @throws IOException  */ public static Connection getSSHConnection(String host,int port,String username,String password,String privateKeyFile) throws IOException {
      Connection connection=new Connection(host,port);     connection.connect();     File file=new File(privateKeyFile);     System.out.println(file);     boolean b=connection.authenticateWithPublicKey(username,file,password);     System.out.println(b);     if (b){
          return connection;     }else {
          System.out.println("登录连接失败，请检查用户名、密码、私钥文件");         return null;     } }

/**  *实现下载服务器上的文件到本地指定目录  * @param conn SSH连接信息  * @param fileName 服务器上的文件地址/opt/scf2/log/loanorder/all.log  * @param localPath 本地路径：D:\  * @throws IOException  */ public void getFile(Connection conn, String fileName,String localPath) throws IOException{
      SCPClient scpClient=conn.createSCPClient();     //String logPath="cd /opt/scf2/log/loanorder";     //Session session = conn.openSession();     //session.execCommand(logPath);//执行shell命令     scpClient.get(fileName,localPath); } /**  *实现上传本地文件到服务器上指定目录  * @param conn SSH连接信息  * @param fileName D:\a.txt  * @param localPath 服务器地址路径：/opt/scf2/log/loanorder  * @throws IOException  */ public void putFile(Connection conn, String fileName,String localPath) throws IOException{
      SCPClient scpClient=conn.createSCPClient();     scpClient.put(fileName,localPath); }