@Order 注解
@Order注解主要用来控制配置类的加载顺序 ：数字越小，越先加载
示例代码:

package com.runlion.tms.admin.constant;
 
public class AService {
 
}
package com.runlion.tms.admin.constant;
 
public class BService {}
package com.runlion.tms.admin.constant;
 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
 
@Configuration
@Order(2)
public class AConfig {
  @Bean
  public AService AService() {
    System.out.println("AService 加载了");
    return new AService();
  }
 
}
package com.runlion.tms.admin.constant;
 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
 
@Configuration
@Order(1)
public class BConfig {
  @Bean
  public BService bService() {
    System.out.println("BService 加载了");
    return new BService();
  }
}

测试类:

package com.runlion.tms.admin.constant;
 
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 
public class OrderMain {
  public static void main(String[] args) {
    AnnotationConfigApplicationContext context =
        new AnnotationConfigApplicationContext("com.runlion.tms.admin.constant");
  }
}

输出结果:
BService 加载了
AService 加载了

因为BService 的@Order(1),所以先打印出来