java(jsp)执行ssh命令在远程执行shell命令

妖狐艹你老母 2022-04-12 11:17 389阅读 0赞

以下两种方法可以指定 主机地址，用户名，密码，端口号（port）

本机是windows，也可以连接的远程linux执行shell命令

**如远程重启另一台weblogic**

1.查看进程号

2.kill -9 进程号

3.启动weblogic

可能会存在open files的问题(如果过堡垒机的也要设置好)

linux修改最大文件链接数open files  
http://happyqing.iteye.com/blog/1953563

**第一种 Ganymed SSH-2 for Java**

据说Ganymed比jsch强大，能写出一些高级的东西

下载地址

[http://www.ganymed.ethz.ch/ssh2/][http_www.ganymed.ethz.ch_ssh2]

[**ganymed-ssh2-build210.zip**][ganymed-ssh2-build210.zip] 包中有样例

样例：

import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    
    import ch.ethz.ssh2.Connection;
    import ch.ethz.ssh2.Session;
    import ch.ethz.ssh2.StreamGobbler;
    
    public class Basic
    {
    	public static void main(String[] args)
    	{
    		String hostname = "127.0.0.1";
    		String username = "joe";
    		String password = "joespass";
    
    		try
    		{
    			/* Create a connection instance */
    
    			Connection conn = new Connection(hostname, 22);
    
    			/* Now connect */
    
    			conn.connect();
    
    			/* Authenticate.
    			 * If you get an IOException saying something like
    			 * "Authentication method password not supported by the server at this stage."
    			 * then please check the FAQ.
    			 */
    
    			boolean isAuthenticated = conn.authenticateWithPassword(username, password);
    
    			if (isAuthenticated == false)
    				throw new IOException("Authentication failed.");
    
    			/* Create a session */
    
    			Session sess = conn.openSession();
    
    			sess.execCommand("uname -a && date && uptime && who");
    
    			System.out.println("Here is some information about the remote host:");
    
    			/* 
    			 * This basic example does not handle stderr, which is sometimes dangerous
    			 * (please read the FAQ).
    			 */
    
    			InputStream stdout = new StreamGobbler(sess.getStdout());
    
    			BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
    
    			while (true)
    			{
    				String line = br.readLine();
    				if (line == null)
    					break;
    				System.out.println(line);
    			}
    
    			/* Show exit status, if available (otherwise "null") */
    
    			System.out.println("ExitCode: " + sess.getExitStatus());
    
    			/* Close this session */
    
    			sess.close();
    
    			/* Close the connection */
    
    			conn.close();
    
    		}
    		catch (IOException e)
    		{
    			e.printStackTrace(System.err);
    			System.exit(2);
    		}
    	}
    }

Connection conn = new Connection(hostname, 22);  
在第二个参数可设置端口（port）

用Ganymed，不用设置什么加密算法，似乎也不用保存主机秘钥。

**第二种 jsch**

下载地址

[http://www.jcraft.com/jsch/][http_www.jcraft.com_jsch]

com.jcraft.jsch 所需jar包

[jsch-0.1.53.zip][]

[jsch-0.1.53.jar][]

样例

[http://www.jcraft.com/jsch/examples/][http_www.jcraft.com_jsch_examples]

网摘样例

package com.codeconch.ssh;
    
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    
    import com.jcraft.jsch.ChannelExec;
    import com.jcraft.jsch.JSch;
    import com.jcraft.jsch.JSchException;
    import com.jcraft.jsch.Session;
    
    /**
     * SSH工具类
     * @author 赵聪慧
     * 2013-4-7
     */
    public class SSHHelper {
      
      /**
       * 远程 执行命令并返回结果调用过程 是同步的（执行完才会返回）
       * @param host	主机名
       * @param user	用户名
       * @param psw	密码
       * @param port	端口
       * @param command	命令
       * @return
       */
      public static String exec(String host,String user,String psw,int port,String command){
        String result="";
        Session session =null;
        ChannelExec openChannel =null;
        try {
          JSch jsch=new JSch();
          session = jsch.getSession(user, host, port);
          java.util.Properties config = new java.util.Properties();
          config.put("StrictHostKeyChecking", "no");
          session.setConfig(config);
          session.setPassword(psw);
          session.connect();
          openChannel = (ChannelExec) session.openChannel("exec");
          openChannel.setCommand(command);
          int exitStatus = openChannel.getExitStatus();
          System.out.println(exitStatus);
          openChannel.connect();  
                InputStream in = openChannel.getInputStream();  
                BufferedReader reader = new BufferedReader(new InputStreamReader(in));  
                String buf = null;
                while ((buf = reader.readLine()) != null) {
                	result+= new String(buf.getBytes("gbk"),"UTF-8")+"    <br>\r\n";  
                }  
        } catch (JSchException | IOException e) {
          result+=e.getMessage();
        }finally{
          if(openChannel!=null&&!openChannel.isClosed()){
            openChannel.disconnect();
          }
          if(session!=null&&session.isConnected()){
            session.disconnect();
          }
        }
        return result;
      }
      
      
      
      public static void main(String args[]){
        String exec = exec("192.168.1.254", "root", "123456", 22, "sleep 20;ls;");
        System.out.println(exec);	
      }
    }

看起来挺简单的，

貌似是在redhat6.7及以后有加密算法的问题，需要在目标机做配置，

Algorithm negotiation fail
    com.jcraft.jsch.JSchException: Algorithm negotiation fail 
    at com.jcraft.jsch.Session.receive_kexinit(Session.java:520) 
    at com.jcraft.jsch.Session.connect(Session.java:286) 
    at com.jcraft.jsch.Session.connect(Session.java:150)

使用Ganymed SSH-2 for Java则不存在此问题

[http_www.ganymed.ethz.ch_ssh2]: http://www.ganymed.ethz.ch/ssh2/
[ganymed-ssh2-build210.zip]: http://www.ganymed.ethz.ch/ssh2/ganymed-ssh2-build210.zip
[http_www.jcraft.com_jsch]: http://www.jcraft.com/jsch/
[jsch-0.1.53.zip]: http://sourceforge.net/projects/jsch/files/jsch/0.1.53/jsch-0.1.53.zip/download
[jsch-0.1.53.jar]: http://sourceforge.net/projects/jsch/files/jsch.jar/0.1.53/jsch-0.1.53.jar/download
[http_www.jcraft.com_jsch_examples]: http://www.jcraft.com/jsch/examples/