详解SpringBoot如何让指定的Bean先加载

public class CustomApplicationContextInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    @Override
    public void initialize(ConfigurableApplicationContext applicationContext) {

        ConfigurableEnvironment environment = applicationContext.getEnvironment();

        // 注册自定义Bean定义
        // applicationContext.registerBean("customBean", CustomBean.class);

        System.out.println("Custom initialization logic executed");
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MySpringBootApplication {

    public static void main(String[] args) {
        SpringApplication application = new SpringApplication(MySpringBootApplication.class);
        application.addInitializers(new CustomApplicationContextInitializer());
        application.run(args);
    }
}

context.initializer.classes=com.li.springbootproject.spring.other.CustomApplicationContextInitializer 

org.springframework.context.ApplicationContextInitializer=com.li.springbootproject.spring.other.CustomApplicationContextInitializer 

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyBeanDefinitionRegistryPostProcessor implements BeanDefinitionRegistryPostProcessor {

    @Override
    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) {
        // 在这里添加您的自定义逻辑，例如注册新的 bean 或修改现有的 bean 定义

        BeanDefinition beanDefinition = new RootBeanDefinition(MyCustomBean.class);
        registry.registerBeanDefinition("myCustomBean", beanDefinition);
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
        // 通常不需要在此方法中执行任何操作
    }
}

@Component
public class MyBean1 {
    // ...
}

@Component
@DependsOn("myBean1")
public class MyBean2 {
    // ...
}

@Component
public class MyBean implements SmartInitializingSingleton {
    @Override
    public void afterSingletonsInstantiated() {
        // 在所有单例Bean实例化之后执行初始化逻辑
    }
}

@Component
public class MyBean {
    
    @PostConstruct
    public void init() {
        // 在Bean初始化后执行的逻辑
    }
}
Construct`注解。

```java
@Component
public class MyBean {
    
    @PostConstruct
    public void init() {
        // 在Bean初始化后执行的逻辑
    }
}