Spring控制bean加载顺序使用详解

@Component
@Order(1)
public class Config1 {
    public Config1(){
        System.out.println("Config1构建了.........");
    }
}
 
​
@Component
@Order(2)
public class Config2 {
    public Config2(){
        System.out.println("Config2构建了.........");
    }
}
 
​

@Configuration
@AutoConfigureAfter(Config1.class)
public class Config2 {
    public Config2(){
        System.out.println("Config2构建了.........");
    }
}
 
@Configuration
public class Config1 {
    public Config1(){
        System.out.println("Config1构建了.........");
    }
}

@Configuration
@AutoConfigureAfter(Config1.class)
public class Config2 {
    public Config2(){
        System.out.println("Config2构建了.........");
    }
}
 
@Configuration
public class Config1 {
    public Config1(){
        System.out.println("Config1构建了.........");
    }
}

@Configuration
@AutoConfigureOrder(1)
public class Config2 {
    public Config2(){
        System.out.println("Config2构建了.........");
    }
}
 
@Configuration
@AutoConfigureOrder(2)
public class Config1 {
    public Config1(){
        System.out.println("Config1构建了.........");
    }
}

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.juzi.test.config.Config2,\
com.juzi.test.config.Config1

@Configuration
@DependsOn("trainTask")
public class AircraftTask {
    @PostConstruct
    public void init(){
        System.out.println("Aircraft获取Train存入redis的数据..........");
    }
}
 
@Configuration
@DependsOn("aircraftTask")
public class CarTask {
    @PostConstruct
    public void init(){
        System.out.println("CarTask获取到Aircraft的数据..........");
    }
}
 
@Configuration
public class TrainTask {
    @PostConstruct
    public void init(){
        System.out.println("Train初查询数据存入redis..........");
    }
}

public class CarTask {
    @PostConstruct
    public void init(){
        System.out.println("CarTask获取到Aircraft的数据..........");
    }
}
 
public class AircraftTask {
    @PostConstruct
    public void init(){
        System.out.println("Aircraft获取Train存入redis的数据..........");
    }
}
 
public class TrainTask {
    @PostConstruct
    public void init(){
        System.out.println("Train初查询数据存入redis..........");
    }
}

public class MyBeanFactoryPostProcessor implements BeanDefinitionRegistryPostProcessor {
 
    @Override
    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
        AbstractBeanDefinition beanDefinition2 = BeanDefinitionBuilder.genericBeanDefinition().getBeanDefinition();
        beanDefinition2.setBeanClass(TrainTask.class);
        registry.registerBeanDefinition("trainTask",beanDefinition2);
 
        AbstractBeanDefinition beanDefinition1 = BeanDefinitionBuilder.genericBeanDefinition().getBeanDefinition();
        beanDefinition1.setBeanClass(AircraftTask.class);
        registry.registerBeanDefinition("aircraftTask",beanDefinition1);
 
        AbstractBeanDefinition beanDefinition = BeanDefinitionBuilder.genericBeanDefinition().getBeanDefinition();
        beanDefinition.setBeanClass(CarTask.class);
        registry.registerBeanDefinition("carTaskTask",beanDefinition);
        //相当于往Spring容器初始化的时的那个List里面添加了一个Bean 只要在扫描之前执行了postProcessBeanDefinitionRegistry 方法 那么就会安装List里面存放的顺序
        //生成Bean
    }
 
    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
 
    }
}

public class MyApplicationContextInitiaLizer implements ApplicationContextInitializer {
 
    @Override
    public void initialize(ConfigurableApplicationContext configurableApplicationContext) {
        configurableApplicationContext.addBeanFactoryPostProcessor(new MyBeanFactoryPostProcessor());
    }
}

#org.springframework.context.ApplicationContextInitializer=com.example.demo11.config.MyApplicationContextInitiaLizer