要自定義SpringBoot CommandLine的啟動邏輯，可以通過實現CommandLineRunner接口或ApplicationRunner接口來實現。

1. 實現CommandLineRunner接口：

import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

@Component
public class CustomCommandLineRunner implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        // 在這里編寫自定義的啟動邏輯
        System.out.println("Custom command line runner is running...");
    }
}

2. 實現ApplicationRunner接口：

import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;

@Component
public class CustomApplicationRunner implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) throws Exception {
        // 在這里編寫自定義的啟動邏輯
        System.out.println("Custom application runner is running...");
    }
}

這樣，在SpringBoot應用啟動時，會自動執行實現了CommandLineRunner或ApplicationRunner接口的類中的run方法，從而實現自定義的啟動邏輯。