常用注解使用总结系列: @Order 注解

Posted 2022-06-30 陆陆通通

@Order 注解

@Order注解主要用来控制配置类的加载顺序
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

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