spring-boot 学习笔记之Runner

SpringBoot之Runner

如果想在SpringBoot容器启动后做一些事情，SpringBoot提供了两个回调类

• CommandLineRunner : 执行参数为ApplicationArguments

  public interface ApplicationRunner {
     void run(ApplicationArguments args) throws Exception;
   }```
  

• ApplicationRunner：执行参数为数组

  public interface CommandLineRunner {
     void run(String... args) throws Exception;
  }```
  

Demo如下：

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}
public class DefaultCommandLineRunner implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        System.out.println(getClass().getSimpleName());
    }
}
@Component
@Order(3)
public class Runner1 extends DefaultCommandLineRunner {

}
@Component
@Order(2)
public class Runner2 extends DefaultCommandLineRunner {

}
@Component
@Order(1)
public class Runner3 extends DefaultCommandLineRunner {

}

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Order排序小的执行顺序在前