java怎么實(shí)現(xiàn)telnet交換機(jī)獲取端口

小億
112
2024-01-18 22:43:20
欄目: 編程語言

要通過Java實(shí)現(xiàn)Telnet交換機(jī)獲取端口信息,你可以使用Java的Socket和TelnetClient類來建立一個(gè)Telnet連接。下面是一個(gè)簡(jiǎn)單的示例代碼:

import org.apache.commons.net.telnet.*;

public class TelnetExample {
    public static void main(String[] args) {
        String host = "交換機(jī)IP";
        int port = 23;
        String user = "用戶名";
        String password = "密碼";

        try {
            TelnetClient client = new TelnetClient();
            client.connect(host, port);

            // 獲取輸入流和輸出流
            InputStream in = client.getInputStream();
            PrintStream out = new PrintStream(client.getOutputStream());

            // 登錄
            readUntil(in, "Username:");
            write(out, user);
            readUntil(in, "Password:");
            write(out, password);

            // 執(zhí)行命令
            write(out, "show interfaces brief");

            // 讀取命令輸出結(jié)果
            String result = readUntil(in, "交換機(jī)提示符");

            // 處理命令輸出結(jié)果
            // ...

            // 關(guān)閉連接
            client.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void write(PrintStream out, String value) {
        out.println(value);
        out.flush();
    }

    private static String readUntil(InputStream in, String pattern) throws IOException {
        StringBuilder sb = new StringBuilder();
        char lastChar = pattern.charAt(pattern.length() - 1);
        char[] chars = new char[1024];
        int read;
        while ((read = in.read(chars)) != -1) {
            sb.append(chars, 0, read);
            if (sb.charAt(sb.length() - 1) == lastChar) {
                if (sb.toString().endsWith(pattern)) {
                    return sb.toString();
                }
            }
        }
        return sb.toString();
    }
}

請(qǐng)注意替換代碼中的以下變量:

  • host:交換機(jī)的IP地址
  • port:Telnet端口,默認(rèn)為23
  • user:Telnet登錄用戶名
  • password:Telnet登錄密碼
  • “show interfaces brief”:要執(zhí)行的獲取端口信息的命令
  • “交換機(jī)提示符”:交換機(jī)的提示符,在命令輸出結(jié)果中用于判斷命令執(zhí)行完成

你需要將以上代碼中的占位符替換為實(shí)際的值,并根據(jù)你所使用的Telnet交換機(jī)的命令輸出格式進(jìn)行相應(yīng)的處理。

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