使用java执行linux的sheel命令

来源：互联网发布：数据为王颠覆营销编辑：程序博客网时间：2024/05/16 01:47

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import javax.swing.JOptionPane;

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 ExecSheelTool {

public static final int SSH2PORT = 22;

public static final int PASSWORD = 0;

public static final int PASSWORDVALIDTIMES = 0;

public static final int FILE = 1;

private static Session session;
private static Channel channel;

/**
*
* @param host              连接主机名
* @param port              连接端口
* @param username          连接用户名
* @param auth              连接认证信息，当method为0时，auth为用户密码；但method为1时，auth为私钥文件
* @param method            连接认证方式，0为密码认证，1为私钥文件认证
* @throws Exception        异常
*/
private static void getSession(String host, Integer port, String username, String auth, int method) throws Exception{
  if(port == null){
   port = SSH2PORT;
  }
  JSch jsch = new JSch();
  if(method == FILE){
   jsch.addIdentity(auth);
  }
  session = jsch.getSession(username, host, port);
  if(method == PASSWORD){
   int times = 0;
   while(auth == null || "".equals(auth)){
    auth = JOptionPane.showInputDialog("Please enter the password!");
    times++;
    if(times == PASSWORDVALIDTIMES){
     throw new Exception();
    }
   }
   session.setPassword(auth);
  }
  session.setTimeout(2000);
  Properties config = new Properties();
  config.put("StrictHostKeyChecking", "no");
  session.setConfig(config);
  session.connect();
}

private static void getChannel(String command) throws JSchException, IOException{
  channel = session.openChannel("exec");
  ChannelExec execChannel = (ChannelExec)channel;
  execChannel.setCommand(command);
}

public static InputStream execute(String host, int port, String username, String password, String command, int method) throws Exception {
  if(session == null){
   getSession(host, port, username, password, method);
  }
  getChannel(command);

  InputStream in = channel.getInputStream();
  channel.connect();
  return in;
}

/**
* 将输入流转化为字符串
* @param is          输入流
* @return            字符串
* @throws Exception 异常
*/
public static String toString(InputStream is) throws Exception {
  StringBuffer sb = new StringBuffer();
  int c = -1;
  while((c = is.read()) != -1){
   sb.append((char)c);
  }
  return sb.toString();
}

public static void release(){
  if(session != null){
   if(session.isConnected()){
    session.disconnect();
   }
  }

  if(channel != null){
   if(channel.isConnected()){
    channel.disconnect();
   }
  }
}
}