Sprin中Bean的顺序使用及说明

@Component
public class CDemo1 {
    private String name = "cdemo 1";

    public CDemo1(CDemo2 cDemo2) {
        System.out.println(name);
    }
}

@Component
public class CDemo2 {
    private String name = "cdemo 2";

    public CDemo2() {
        System.out.println(name);
    }
}

@Component
public class SystemInit {

   @Autowired
    private SpringBeanManager springBeanManager;

    @PostConstruct
    public void init() {
        //初始化 script job  bean
        GroovyBeanInit.InitScriptJob();
    }
}

@Component("dependson02")
public class Dependson02 {
 
    Dependson02(){
        System.out.println(" dependson02 Success ");
    }
}

@Component
@DependsOn("dependson02")
public class Dependson01 {
 
    Dependson01(){
        System.out.println("Dependson01 success");
    }
}

/**
 *配置类
 */
@Configuration
@ComponentScan(basePackages = "demo")
public class AppConfig extends WebMvcConfigurationSupport {

	/**
	 * 注册用于控制bean加载顺序的处理器
	 * @return
	 */
	@Bean
	public static DemoProcessor demoProcessor() {
		return new DemoProcessor();
	}
}

/**
 *
 */
public class DemoProcessor implements BeanDefinitionRegistryPostProcessor{

	@Override
	public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
		
	}

	@Override
	public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
		String[] beanDefinitionNames = registry.getBeanDefinitionNames();
		int index = 0;
		//保留前n个关键bean的顺序
		for(;index<beanDefinitionNames.length;index++) {
			if(AppConfig.class.getName().equals(registry.getBeanDefinition(beanDefinitionNames[index]).getBeanClassName())) {
				break;
			}
		}
		Map<String, BeanDefinition> beans = new LinkedHashMap<>(beanDefinitionNames.length-index);
		for(;index<beanDefinitionNames.length;index++) {
			BeanDefinition beanDefinition = registry.getBeanDefinition(beanDefinitionNames[index]);
			beans.put(beanDefinitionNames[index], beanDefinition);
			registry.removeBeanDefinition(beanDefinitionNames[index]);
		}
		//TODO ...排序逻辑，注意beans中可能还包含有其他spring自身定义的bean
		List<String> orderdBeanNames = new ArrayList<>();
		//将排好序的bean再次注册到容器中
		orderdBeanNames.forEach(beanName->{
			registry.registerBeanDefinition(beanName, beans.get(beanName));
		});
	}
}

@PropertySource(value = {"classpath:config/user1.properties","classpath:config/user2.properties"})

@ImportResource(value = {"classpath:/beans.xml"})
@SpringBootApplication(scanBasePackages = {"team.seagull.client"})
public class DeployApplication {
    public static void main(String[] args) {
        SpringApplication.run(DeployApplication.class, args);
    }
}