public class Basic {public static void main(String[] args) {String hostname1 = "";String username1 = "";String password1 = "";String hostname2 = "";String username2 = "";String password2 = "";String hostname3 = "";String username3 = "";String password3 = "";/*** 服务器1*/Montor montor1 = getMontor(hostname1, username1, password1);/*** 服务器2*/Montor montor2 = getMontor(hostname2, username2, password2);/*** 服务器3*/Montor montor3 = getMontor(hostname3, username3, password3);System.out.println(montor1.toString());System.out.println(montor2.toString());System.out.println(montor3.toString());}private static Montor getMontor(String hostname, String username,String password) {Montor montor = null;try {Connection conn = new Connection(hostname);conn.connect();boolean isAuthenticated;isAuthenticated = conn.authenticateWithPassword(username, password);if (isAuthenticated == false)throw new IOException("Authentication failed.");montor = new Montor();montor.setHostName(exec(conn, "hostname"));montor.setDiskSpace(exec(conn, "df -h | awk 'NR==2 {print $2}'"));montor.setUserSpace(exec(conn, "df -h | awk 'NR==2 {print $3}'"));montor.setRemainingSpace(exec(conn,"df -h | awk 'NR==2 {print $4}'"));montor.setMemory(exec(conn, "free -m | awk 'NR==2 {print $2}'"));montor.setUseMemory(exec(conn, "free -m | awk 'NR==2 {print $3}'"));montor.setRemainingMemory(exec(conn,"free -m | awk 'NR==2 {print $4}'"));BigDecimal b1 = new BigDecimal(exec(conn,"free -m | awk 'NR==2 {print $3}'"));BigDecimal b2 = new BigDecimal(exec(conn,"free -m | awk 'NR==2 {print $2}'"));montor.setUsageMemory((b1.divide(b2, 2, BigDecimal.ROUND_HALF_UP)).doubleValue()* 100 + "%");conn.close();} catch (IOException e) {// TODO Auto-generated catch block
            e.printStackTrace();}return montor;};/*** * @param conn 连接* @param command 执行的sheel命令* @return*/private static String exec(Connection conn, String command) {String data = "";try {Session sess = conn.openSession();//执行命令
            sess.execCommand(command);InputStream stdout = new StreamGobbler(sess.getStdout());BufferedReader br = new BufferedReader(new InputStreamReader(stdout));while (true) {String line = br.readLine();if (line == null)break;data = line;}br.close();sess.close();} catch (IOException e) {e.printStackTrace(System.err);System.exit(2);}return data;}
}