添加依赖

<dependency>
      <groupId>com.amdelamar</groupId>
      <artifactId>jotp</artifactId>
      <version>1.3.0</version>
    </dependency>

执行下面代码

public class TOTPTest {

    public static void main(String[] args) throws Exception{
        // Generate a Time-based OTP from the secret, using Unix-time
        // rounded down to the nearest 30 seconds.
        String hexTime = OTP.timeInHex(System.currentTimeMillis(), 30);
        String secret="123456";// github 的 secrt码
        String code = OTP.create(secret, hexTime, 6, Type.TOTP);
        System.out.println(code);
    }
}