采用JSCH实现对linux远程操作，执行简单的命令

?JSch是Java Secure Channel的缩写。JSch是一个SSH2的纯Java实现。它允许你连接到一个SSH服务器，并且可以使用端口转发，X11转发，文件传输等，当然你也可以集成它的功能到你自己的应用程序。

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;

public class JSchDemo {
    private String charset = "UTF-8"; // 设置编码格式
    private String user; // 用户名
    private String passwd; // 登录密码
    private String host; // 主机IP
    private JSch jsch;
    private Session session;

    /**
     * 
     * @param user用户名
     * @param passwd密码
     * @param host主机IP
     */
    public JSchDemo(String user,String passwd,String host) {
        this.user = user;
        this.passwd = passwd;
        this.host = host;
    }

    /**
     * 连接到指定的IP
     * 
     * @throws JSchException
     */
    public void connect() throws JSchException {
        jsch = new JSch();
        session = jsch.getSession(user,host,22);
        session.setPassword(passwd);
        java.util.Properties config = new java.util.Properties();
        config.put("StrictHostKeyChecking","no");
        session.setConfig(config);
        session.connect();
    }

    /**
     * 执行相关的命令
     */
    public void execCmd() {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String command = "";
        BufferedReader reader = null;
        Channel channel = null;

        try {
            while ((command = br.readLine()) != null) {
                channel = session.openChannel("exec");
                ((ChannelExec) channel).setCommand(command);
                channel.setInputStream(null);
                ((ChannelExec) channel).setErrStream(System.err);

                channel.connect();
                InputStream in = channel.getInputStream();
                reader = new BufferedReader(new InputStreamReader(in,Charset.forName(charset)));
                String buf = null;
                while ((buf = reader.readLine()) != null) {
                    System.out.println(buf);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSchException e) {
            e.printStackTrace();
        } finally {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            channel.disconnect();
            session.disconnect();
        }
    }

    public static void main(String[] args) throws Exception {
        String user = "root";
        String passwd = "123456";
        String host = "192.168.1.188";

        JSchDemo demo = new JSchDemo(user,passwd,host);
        demo.connect();
        demo.execCmd();
    }
}