关于java:springBoot启动时自动执行代码的几种方式

@Componentpublic class initConfig {    //1、动态代码块    static {        System.out.println("aaaaa");        System.out.println("===================");    }    //2、构造方法    public initConfig(){        System.out.println("bbbbbb");        System.out.println("===================");    }    //3、注解    @PostConstruct    public void init(){        System.out.println("ccccccc");        System.out.println("===================");    }}

@Component@Order(1)  //执行程序public class TestApplicationRunner implements ApplicationRunner{    @Override    public void run(ApplicationArguments applicationArguments) throws Exception {        System.out.println("order1:TestApplicationRunner");    }}@Component@Order(2)public class TestCommandLineRunner implements CommandLineRunner {    @Override    public void run(String... strings) throws Exception {        System.out.println("order2:TestCommandLineRunner");    }}

总结：
加载程序为static>constructer>@PostConstruct>CommandLineRunner和ApplicationRunner