Spring Boot CommandLineRunner/ApplicationRunner

Spring boot 的最基本的操作就是执行一个进程 也就是 CommandLineRunner。如果要使用spring batch 那么就可以研究下spring boot batch 参考另一篇博文

CommandLineRunner.java

你需要做的就是实现run() 方法，并不是一个线程 。
你可以使用Order(num)来实现流程的控制。
原型为下:

#CommandLineRunner.java 

public interface CommandLineRunner {
    void run(String... var1) throws Exception;
}

#ApplicationRunner.java
public interface ApplicationRunner {
    void run(ApplicationArguments var1) throws Exception;
}

下面是CommandLineRunner的例子：

1. SpiderBatchApplication.java

   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.beans.factory.annotation.Qualifier;
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
   import org.springframework.context.annotation.Bean;
   
   @EnableAutoConfiguration
   @SpringBootApplication
   public class SpiderBatchApplication {
   
       private static final Logger logger = LoggerFactory.getLogger(SpiderBatchApplication.class);
   
       /**
        * 
        * @param args
        * @throws Exception
        */
       public static void main(String[] args) throws Exception {
           // System.exit is common for Batch applications since the exit code can be used to
           // drive a workflow
           logger.info("======================");
           System.exit(SpringApplication
                   .exit(SpringApplication.run(SpiderBatchApplication.class, args)));
       }
   
   }
   

2. Task1.java

   import org.springframework.boot.ApplicationArguments;
   import org.springframework.boot.ApplicationRunner;
   import org.springframework.boot.CommandLineRunner;
   import org.springframework.core.annotation.Order;
   import org.springframework.stereotype.Component;
   @Component
   @Order(2)
   public class Task1 implements CommandLineRunner {
   
       @Override
       public void run(String... strings) throws Exception {
           System.out.println("task11111111111");
       }
   }
   
   

3. Task2.java

   
   import org.springframework.boot.CommandLineRunner;
   import org.springframework.core.annotation.Order;
   import org.springframework.stereotype.Component;
   
   /**
    * Created with IntelliJ IDEA.
    * User: leo
    * Date: 2017/11/10
    * Time: 10:15
    * To change this template use File | Settings | File Templates.
    */
   @Component
   @Order(1)
   public class Task2 implements CommandLineRunner {
   
       @Override
       public void run(String... strings) throws Exception {
           System.out.println("task2222222222");
       }
   }