java使用SSH连接Linux系统

SSH连接linux系统使我们在开发项目中常用到的，现在留下来，做个记录

 package com.log;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;

 import ch.ethz.ssh2.Connection;
 import ch.ethz.ssh2.Session;
 import ch.ethz.ssh2.StreamGobbler;

 public class Test8 {

     /**
      * 连接linux系统
      * @param args
      */
     public static void main(String[] args) {
         try {
             Connection conn = new Connection("192.168.81.129");
             conn.connect();
             boolean isAuthenticated = conn.authenticateWithPassword("root",
             "123456");
             if (isAuthenticated == false) {
             throw new IOException("Authentication failed");
             }
             Session sess = conn.openSession();
             sess.requestPTY("bash");
             sess.startShell();
             InputStream stdout = new StreamGobbler(sess.getStdout());
             InputStream stderr = new StreamGobbler(sess.getStderr());
             BufferedReader stdoutReader = new BufferedReader(
             new InputStreamReader(stdout));
             BufferedReader stderrReader = new BufferedReader(
             new InputStreamReader(stderr));
             BufferedReader inputReader = new BufferedReader(
             new InputStreamReader(System.in));
             PrintWriter out = new PrintWriter(sess.getStdin());
             String temp = "";
             while (!temp.equals("exit")) {
             System.out.print("[root@vmone ~]#");
             temp = inputReader.readLine();
             out.println(temp);
             out.flush();
             String line = null;
             while ((line = stdoutReader.readLine()) != null) {
             if (line.length() == 0) {// line等于null从来不会发生，导致程序卡在这里
             continue;
             } else{
             System.out.println(line);
             }
             }
             System.out.println("Here is the output from stderr:");
             while (true) {
             line = stderrReader.readLine();
             if (line == null)
             break;
             System.out.println(line);
             }
             }
             System.out.println("ExitCode: " + sess.getExitStatus());
             sess.close();
             conn.close();
             System.out.println("close connection");
             } catch (IOException e) {
             e.printStackTrace(System.err);
             System.exit(2);
             }
     }

 }

下面截图是次程序运行结果