JSch连接SSH远程执行命令

JSch 是SSH2的一个纯Java实现。它允许你连接到一个sshd 服务器，使用端口转发，X11转发，文件传输等等。你可以将它的功能集成到你自己的 程序中。同时该项目也提供一个J2ME版本用来在手机上直连SSHD服务器。

来自百度百科!

SSHExcuteCommandHelper

package test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;


import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;

/**
 * SSH工具类
 * 
 */
public class SSHExcuteCommandHelper {
	Session session = null;
	ChannelExec openChannel = null;
	/**
	 * @param host  主机ip
	 * @param uname 用户名
	 * @param upwd 密码
	 * @param port ssh端口 
	 */
	public SSHExcuteCommandHelper(String host, String user, String pwd, int port) {
		JSch jsch = new JSch();
		try {
			session = jsch.getSession(user, host, port);
			java.util.Properties config = new java.util.Properties();
			config.put("StrictHostKeyChecking", "no");
			session.setTimeout(1000);
			session.setConfig(config);
			session.setPassword(pwd);
		} catch (JSchException e) {
			e.printStackTrace();
		}
	}
	/**
	 * 是否连接成功,调用如果不需要调用execCommand方法那么必须调用 disconnect方法关闭session
	 * @return
	 */
	public boolean canConnection(){
		try {
			session.connect();
			return true;
		} catch (JSchException e) {
			e.printStackTrace();
			return false;
		}
	}
	/**
	 * 关闭连接
	 */
	public void disconnect(){
		if (openChannel != null && !openChannel.isClosed()) {
			openChannel.disconnect();
		}
		if (session != null && session.isConnected()) {
			session.disconnect();
		}
	}

	/**
	 * 执行命令
	 * @param command
	 * @return
	 */
	public String execCommand(String command) {
		StringBuffer result = new StringBuffer();
		try {
			if(!session.isConnected()){
				session.connect();
			}
			openChannel = (ChannelExec) session.openChannel("exec");
			openChannel.setCommand(command);
			//int exitStatus = openChannel.getExitStatus();
			openChannel.connect();
			InputStream in = openChannel.getInputStream();
			BufferedReader reader = new BufferedReader(
					new InputStreamReader(in));
			
			String tmpStr = "";
			while ((tmpStr = reader.readLine()) != null) {
				result.append(new String(tmpStr.getBytes("gbk"), "UTF-8")).append("\n");
			}
			
		} catch (JSchException | IOException e) {
			e.printStackTrace();
			result.append(e.getMessage());
		} finally {
			disconnect();
		}
		return result.toString();
	}
	/**
	 * 解析
	 * @param result
	 * @return
	 */
	public List<List<String>> parseResult(String result){
		List<List<String>> parseResult = new ArrayList<>();
		List<String> list = null;
		//
		for (String line : result.split("\n")) {
			list = new ArrayList<String>();
			String[] columns = {};
			//这个是针对df命令的 [Mounted on] 其实就一个,如果用空格就会分割出两个
			if(line.contains("Mounted ")){
				columns = line.replace("Mounted ", "Mounted-").split(" ");
			}else{
				columns = line.split(" ");
			}
			
			for (String column : columns) {
				if (!" ".equals(column) && !"".equals(column)) {
					list.add(column);
				}
			}
			parseResult.add(list);
		}
		return parseResult;
	}

	public static void main(String args[]) {
		SSHExcuteCommandHelper execute = new SSHExcuteCommandHelper("xxxx", "xxxx", "xxxxx", 22);
		System.out.println("是否连接成功"+execute.canConnection());
		String s = execute.execCommand("df");
		System.out.println("解析前");
		System.out.println(s);
		System.out.println("解析后");
		List<List<String>> parseResult = execute.parseResult(s);
		for (List<String> l : parseResult) {
			System.out.println(l);
		}
		

	}
}

上面的这个很简单的功能,一次只能执行一条命令,再去找找资料.记录下备忘!