SpringBoot实战之4 整合CommandLineRunner

ゝ一纸荒年。 2022-06-04 05:24 250阅读 0赞

## 场景 ##

某些情况下需要再服务启动时执行部分代码，有很多实现方式，这里讲解实现CommandLineRunner接口实现。

## 方法 ##

自定义类实现CommandLineRunner并且重写run方法。

## code实现 ##

自定义方法Runner.java

@Component
    public class Runner implements CommandLineRunner{ 
        private final Logger _logger = LoggerFactory.getLogger(this.getClass());
        @Override
        public void run(String... strings) throws Exception {
            _logger.info("服务启动时执行此方法");
        }
    }

自定义方法Runner1.java

@Component
    @Order(value = 1)
    public class Runner1 implements CommandLineRunner{ 
        private final Logger _logger = LoggerFactory.getLogger(this.getClass());
        @Override
        public void run(String... strings) throws Exception {
           _logger.info("服务启动时执行此方法:Runner1");
        }
    }

自定义方法Runner2.java

@Component
    @Order(value = 2)
    public class Runner2 implements CommandLineRunner{ 
        private final Logger _logger = LoggerFactory.getLogger(this.getClass());
        @Override
        public void run(String... strings) throws Exception {
            _logger.info("服务启动时执行此方法:Runner2");
        }
    }

入口

@SpringBootApplication
    public class SpringBootRunnerApplication { 
        public static void main(String[] args) {
            SpringApplication.run(SpringBootRunnerApplication.class,args);
        }
    }

## 运行效果 ##

![这里写图片描述][SouthEast]

## 项目结构图 ##

![这里写图片描述][SouthEast 1]

## 分析 ##

当有多个自定义方法实现CommandLineRunner方法时，设置顺序Order，数字越小执行优先级越高，默认Order：2147483647

## 历史文章 ##

[SpringBoot实战之入门][SpringBoot]

[springboot实战之文章汇总][springboot]

[springboot实战之读取配置文件][springboot 1]

[springboot实战之整合jsp模版引擎][springboot_jsp]

[springboot实战之整合freemarker模版引擎][springboot_freemarker]

[springboot实战之注册自定义Servlet][springboot_Servlet]

[springboot实战之注册filter和listener][springboot_filter_listener]

[springboot实战之注册interceptor][springboot_interceptor]

[SouthEast]: /images/20220604/1892d3e0a2254d36b7ba20d902ec59eb.png
[SouthEast 1]: /images/20220604/0e258c2509624fd7a1a769fcd2ca3d44.png
[SpringBoot]: http://blog.csdn.net/u012806787/article/details/78694912
[springboot]: http://blog.csdn.net/u012806787/article/details/78686998
[springboot 1]: http://blog.csdn.net/u012806787/article/details/78583814
[springboot_jsp]: http://blog.csdn.net/u012806787/article/details/78700999
[springboot_freemarker]: http://blog.csdn.net/u012806787/article/details/78706156
[springboot_Servlet]: http://blog.csdn.net/u012806787/article/details/78710113
[springboot_filter_listener]: http://blog.csdn.net/u012806787/article/details/78715725
[springboot_interceptor]: http://blog.csdn.net/u012806787/article/details/78719429