执行服务器中的指令

public class SSHUtil {
    private static Logger logger = LoggerFactory.getLogger(SSHUtil.class);

    private String ip;
    private int port;
    private String user;
    private String pa;
    private Session session ;
    private ChannelExec channelExec;

    private Session sessionServer ;
    private ChannelExec channelExecServer;

    public SSHUtil(String ip, int port, String user, String pa){
        this.ip = ip;
        this.port = port;
        this.user = user;
        this.pa = pa;
    }

    public void sessionConnect(){
        JSch jsch = new JSch();
        try {
            session = jsch.getSession(user, ip, port);
            //  跳过受检
            session.setConfig("StrictHostKeyChecking", "no");
            session.setPassword(pa);
            session.connect();
        } catch (JSchException e) {
            logger.error("SSH连接失败");
            e.printStackTrace();
        }

    }

    public void sessionConnectServer(){
        JSch jsch = new JSch();
        try {
            sessionServer = jsch.getSession(user, ip, port);
            //  跳过受检
            sessionServer.setConfig("StrictHostKeyChecking", "no");
            sessionServer.setPassword(pa);
            sessionServer.connect();
        } catch (JSchException e) {
            logger.error("SSH连接失败");
            e.printStackTrace();
        }

    }

    public String exeCommand(String command){
        sessionConnect();
        try {
            channelExec = (ChannelExec) session.openChannel("exec");
            InputStream in = channelExec.getInputStream();
            channelExec.setCommand(command);
            channelExec.setErrStream(System.err);
            channelExec.connect();
            logger.info("SSH远程命令"+command+"执行");
            StringBuffer buffer = new StringBuffer();
            BufferedReader br = new BufferedReader(new InputStreamReader(in, Charset.defaultCharset()));
            String line = null;
            while ((line = br.readLine()) != null) {
                buffer.append(line + "\n");
            }
            logger.info("SSH远程命令"+command+"执行完成");

            return buffer.toString();
        } catch (JSchException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                channelExec.disconnect();
                session.disconnect();
            } catch (Exception e){
                e.printStackTrace();
            }
        }
        return null;
    }

    public HashMap<String, String> exeCommand1(String command){
        sessionConnect();
        HashMap<String, String> resultMap = new HashMap<>();
        try {
            channelExec = (ChannelExec) session.openChannel("exec");
            InputStream in = channelExec.getInputStream();
            channelExec.setCommand(command);
            channelExec.setErrStream(System.err);
            channelExec.connect();
            StringBuffer buffer = new StringBuffer();
            BufferedReader br = new BufferedReader(new InputStreamReader(in, Charset.defaultCharset()));
            String line;
            while ((line = br.readLine()) != null) {
                String[] split = line.split(" ");
                if(split.length > 1){
                    resultMap.put(split[0],split[1]);
                }
                buffer.append(line + "\n");
            }
            return resultMap;
        } catch (JSchException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                channelExec.disconnect();
                session.disconnect();
            } catch (Exception e){
                e.printStackTrace();
            }
        }
        return null;
    }


    public List<String> exeCommand2(String command){
        sessionConnect();
        List<String> list = new ArrayList<>();
        try {
            channelExec = (ChannelExec) session.openChannel("exec");
            InputStream in = channelExec.getInputStream();
            channelExec.setCommand(command);
            channelExec.setErrStream(System.err);
            channelExec.connect();
            BufferedReader br = new BufferedReader(new InputStreamReader(in, Charset.defaultCharset()));
            String line;
            int i =1;
            while ((line = br.readLine()) != null) {
                if (i ==2) {
                    String[] split = line.split(" ");
                    for (String s : split) {
                        if (s != null && !s.equals("")) {
                            list.add(s);
                        }
                    }
                }
                i++;
            }
            return list;
        } catch (JSchException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                channelExec.disconnect();
                session.disconnect();
            } catch (Exception e){
                e.printStackTrace();
            }
        }
        return null;
    }


    public List<String> exeCommandServer(String command){
        sessionConnectServer();
        List<String> list = new ArrayList<>();
        try {
            channelExecServer = (ChannelExec) sessionServer.openChannel("exec");
            InputStream in = channelExecServer.getInputStream();
            channelExecServer.setCommand(command);
            channelExecServer.setErrStream(System.err);
            channelExecServer.connect();
            BufferedReader br = new BufferedReader(new InputStreamReader(in, Charset.defaultCharset()));
            String line;
            int i =1;
            while ((line = br.readLine()) != null) {
                if (i ==2) {
                    String[] split = line.split(" ");
                    for (String s : split) {
                        if (s != null && !s.equals("")) {
                            list.add(s);
                        }
                    }
                }
                i++;
            }
            return list;
        } catch (JSchException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                channelExecServer.disconnect();
                sessionServer.disconnect();
            } catch (Exception e){
                e.printStackTrace();
            }
        }
        return null;
    }


    public void closeServer(){
        if(channelExecServer != null){
            channelExecServer.disconnect();
        }
        if(sessionServer != null){
            sessionServer.disconnect();
        }
    }

}