java通过telnet执行命令

分手后的思念是犯贱 2022-07-10 07:58 553阅读 0赞

/**  * commons-net-2.0.jar是工程依赖包   */
    
    import java.io.InputStream;
    import java.io.PrintStream;
    import org.apache.commons.net.telnet.TelnetClient;
    
    public class NetTelnet {
    	private TelnetClient telnet = new TelnetClient();
    	private InputStream in;
    	private PrintStream out;
    	private char prompt = '$';
    
    	// 普通用户结束
    	public NetTelnet(String ip, int port, String user, String password) {
    		try {
    			telnet.connect(ip, port);
    			in = telnet.getInputStream();
    			out = new PrintStream(telnet.getOutputStream());
    			// 根据root用户设置结束符
    			this.prompt = user.equals("root") ? '#' : '$';
    			login(user, password);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	/** * 登录 * * @param user * @param password */
    	public void login(String user, String password) {
    		readUntil("login:");
    		write(user);
    		readUntil("Password:");
    		write(password);
    		readUntil(prompt + " ");
    	}
    
    	/** * 读取分析结果 * * @param pattern * @return */
    	public String readUntil(String pattern) {
    		try {
    			char lastChar = pattern.charAt(pattern.length() - 1);
    			StringBuffer sb = new StringBuffer();
    			char ch = (char) in.read();
    			while (true) {
    				sb.append(ch);
    				if (ch == lastChar) {
    					if (sb.toString().endsWith(pattern)) {
    						return sb.toString();
    					}
    				}
    				ch = (char) in.read();
    			}
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return null;
    	}
    
    	/** * 写操作 * * @param value */
    	public void write(String value) {
    		try {
    			out.println(value);
    			out.flush();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	/** * 向目标发送命令字符串 * * @param command * @return */
    	public String sendCommand(String command) {
    		try {
    			write(command);
    			return readUntil(prompt + " ");
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return null;
    	}
    
    	/** * 关闭连接 */
    	public void disconnect() {
    		try {
    			telnet.disconnect();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	public static void main(String[] args) {
    		try {
    			System.out.println("启动Telnet...");
    			String ip = "192.168.0.11";
    			int port = 23;
    			String user = "user";
    			String password = "111111";
    			NetTelnet telnet = new NetTelnet(ip, port, user, password);
    			telnet.sendCommand("export LANG=en");
    			String r1 = telnet.sendCommand("cd /home/project/");
    			String r2 = telnet.sendCommand("pwd");
    			String r3 = telnet.sendCommand("sh a.sh");
    			System.out.println("显示结果");
    			System.out.println(r1);
    			System.out.println(r2);
    			System.out.println(r3);
    			telnet.disconnect();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    }