SpringBoot项目启动执行任务的多种方法小结

@Component
public class MyFilter implements Filter {
    /**
     * init() ：该方法在tomcat容器启动初始化过滤器时被调用，它在 Filter 的整个生命周期只会被调用一次。
     * doFilter() ：容器中的每一次请求都会调用该方法， FilterChain(放行) 用来调用下一个过滤器 Filter。
     * destroy()： 当容器销毁过滤器实例时调用该方法，在方法中销毁或关闭资源，在过滤器 Filter 的整个生命周期也只会被调用一次。
     */
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("Filter 前置");
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("Filter 处理中");
        filterChain.doFilter(servletRequest, servletResponse);
    }
    @Override
    public void destroy() {
        System.out.println("Filter 后置");
    }
}

@Component
public class MyInitStart2 implements InitializingBean {
    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("在MyInitStart2中添加初始下方法");
    }
}

@Component
public class MyInitStart3 implements ApplicationListener<ApplicationStartedEvent> {
    @Override
    public void onApplicationEvent(ApplicationStartedEvent event) {
        System.out.println("在MyInitStart3中添加初始下方法");
    }
}

@Component
public class MyInitStart4 implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println("在MyInitStart4中添加初始下方法");
    }
}

@Component
public class MyInitStart5 implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        System.out.println("在MyInitStart5中添加初始下方法");
    }
}

@Component
public class MyInitStart6 {
    @PostConstruct
    public void run() {
        System.out.println("在MyInitStart6中添加初始下方法");
    }
}

    public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
        ConfigurableApplicationContext run = SpringApplication.run(YabaoApplication.class, args);
        System.out.println("在启动类添加初始下方法");
    }