Ganymed SSH-2 for Java系列3之执行远程shell 命令
利用Ganymed SSH-2 for Java 连接到远程服务器，然后执行shell命令；
首先我们再在之前CommandRunner类中再添加一个执行shell命令的方法，具体如下所示：
public static String execShellScript(String host, String username,
String password,
String cmd, int port) throws IOException {
if (logger.isInfoEnabled()) {
logger.info("running SSH cmd [" + cmd + "]");
}
Connection conn = null;
Session sess = null;
InputStream stdout = null;
BufferedReader br = null;
StringBuffer buffer = new StringBuffer("exec result:");
buffer.append(System.getProperty("line.separator"));// 换行
try {
conn = getOpenedConnection(host, username, password, port);
sess = conn.openSession();
sess.execCommand(cmd);
stdout = new StreamGobbler(sess.getStdout());
br = new BufferedReader(new InputStreamReader(stdout));
while (true) {
// attention: do not comment this block, or you will hit
// NullPointerException
// when you are trying to read exit status
String line = br.readLine();
if (line == null)
break;
buffer.append(line);
buffer.append(System.getProperty("line.separator"));// 换行
if (logger.isInfoEnabled()) {
logger.info(line);
}
}
} finally {
sess.close();
conn.close();
}
return buffer.toString();
}
测试代码：
public static void main(String[] args) {
String cmd = "uname -a";
try {
String info = CommandRunner.execShellScript("172.16.18.141", "root",
"123456",cmd,22);
System.out.println("info is:"+info);
} catch (IOException e) {
e.printStackTrace();
}
}
log4j:WARN No appenders could be found for logger (com.ssh2.shell.ganymed.CommandRunner).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
info is:exec result:
Linux localhost.localdomain 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
至此，连接远程服务器执行shell命令简单方法就实现了。