Spring Boot:在带有@Bean注释的方法中获取命令行参数

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class MyApp implements ApplicationRunner {

    public static void main(String[] args) {
        SpringApplication.run(MyApp.class, args);
    }

    @Autowired
    private ApplicationArguments applicationArguments;

    @Bean
    public MyBean myBean() {
        return new MyBean();
    }

    @Override
    public void run(ApplicationArguments args) throws Exception {
        // 获取所有命令行参数
        String[] argsArray = applicationArguments.getSourceArgs();
        System.out.println("命令行参数：" + Arrays.toString(argsArray));

        // 获取单个命令行参数
        String param = applicationArguments.getOptionValues("param").get(0);
        System.out.println("命令行参数param：" + param);
    }
}

class MyBean {

    public MyBean() {
        // 在构造函数中可以获取命令行参数
        String[] argsArray = SpringApplication
                .run(MyApp.class)
                .getBean(ApplicationArguments.class)
                .getSourceArgs();
        System.out.println("命令行参数：" + Arrays.toString(argsArray));
    }
}