Spring Boot 中 CommandLineRunner接口

朱雀 2022-02-02 01:19 225阅读 0赞

使用方法详见：[https://blog.csdn.net/catoop/article/details/50501710][https_blog.csdn.net_catoop_article_details_50501710]

探索一下该接口的实现，在该Application中的执行顺序：

import org.springframework.stereotype.Controller;
    
    /**
     * @author 
     * @date 2019/5/10 14:17
     */
    @Controller
    public class RunnerOrderTestController {
        static{
            System.out.println("Controller的静态代码块");
        }
        {
            System.out.println("Controller的动态代码块");
        }
    }

import com.example.demo.springCach.User;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    /**
     * @author 
     * @date 2019/5/10 14:16
     */
    @Configuration
    public class RunnerOrderTestConfig {
        @Bean
        public User testOrder(){
            System.out.println("我是Configuration中的Bean");
            return null;
        }
    }

import org.springframework.boot.CommandLineRunner;
    import org.springframework.stereotype.Component;
    
    /**
     * @author 
     * @date 2019/5/10 14:14
     */
    @Component
    public class RunnerOrderTestRunner implements CommandLineRunner{
        @Override
        public void run(String... strings) throws Exception {
            System.out.println("我是一个CommandLineRunner实例");
        }
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQ2NjI4NTg_size_16_color_FFFFFF_t_70][]

结果是 CommandLineRunner实例会在Boot项目启动完成之后执行。

[https_blog.csdn.net_catoop_article_details_50501710]: https://blog.csdn.net/catoop/article/details/50501710
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQ2NjI4NTg_size_16_color_FFFFFF_t_70]: /images/20220202/5261037c89fa4752be18d9f7b60ac43f.png