java(jsp)执行ssh命令 在远程执行shell命令

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/

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/

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/

 

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