Java中通过jsch来连接远程服务器执行linux命令

public class CogradientImgFileManager{
private static final Logger log = LoggerFactory.getLogger(CogradientImgFileManager.class);
private static ChannelExec channelExec;
private static Session session = null;
private static int timeout = 60000; 
// 测试代码
public static void main(String[] args){
try{
versouSshUtil("10.8.12.189","jmuser","root1234",22);
runCmd("java -version","UTF-8");
}catch (Exception e){
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 连接远程服务器
* @param host ip地址
* @param userName 登录名
* @param password 密码
* @param port 端口
* @throws Exception
*/
public static void versouSshUtil(String host,String userName,String password,int port) throws Exception{
log.info("尝试连接到....host:" + host + ",username:" + userName + ",password:" + password + ",port:"
+ port);
JSch jsch = new JSch(); // 创建JSch对象
session = jsch.getSession(userName, host, port); // 根据用户名，主机ip，端口获取一个Session对象
session.setPassword(password); // 设置密码
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config); // 为Session对象设置properties
session.setTimeout(timeout); // 设置timeout时间
session.connect(); // 通过Session建立链接
}
/**
* 在远程服务器上执行命令
* @param cmd 要执行的命令字符串
* @param charset 编码
* @throws Exception
*/
public static void runCmd(String cmd,String charset) throws Exception{
channelExec = (ChannelExec) session.openChannel("exec");
channelExec.setCommand(cmd);
channelExec.setInputStream(null);
channelExec.setErrStream(System.err);
channelExec.connect();
InputStream in = channelExec.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in, Charset.forName(charset)));
String buf = null;
while ((buf = reader.readLine()) != null){
System.out.println(buf);
}
reader.close();
channelExec.disconnect();
}
}