定时任务实现(spring boot 自带的Scheduled)

定时任务执行方式：

  • 单线程（串行）
  • 多线程（并行）

创建定时任务:

 1 package redcord.task;
 2 
 3 import org.slf4j.Logger;
 4 import org.slf4j.LoggerFactory;
 5 import org.springframework.scheduling.annotation.Scheduled;
 6 import org.springframework.stereotype.Component;
 7 
 8 /**
 9  * Created by P.ww on 2017-12-22.
10  */
11 @Component
12 public class KeepAlive {
13 
14     private static final Logger logger = LoggerFactory.getLogger(KeepAlive.class);
15 
16     @Scheduled(cron="0/5 * * * * ?")
17     public void executeFileDownLoadTask() {
18 
19         // 间隔2分钟,执行工单上传任务
20         Thread current = Thread.currentThread();
21         System.out.println("定时任务1:"+current.getId());
22         logger.info("ScheduledTest.executeFileDownLoadTask 定时任务1:"+current.getId()+ ",name:"+current.getName());
23     }
24 
25     @Scheduled(cron="0/5 * * * * ?")
26     public void executeUploadTask() {
27 
28         // 间隔1分钟,执行工单上传任务
29         Thread current = Thread.currentThread();
30         System.out.println("定时任务2:"+current.getId());
31         logger.info("ScheduledTest.executeUploadTask 定时任务2:"+current.getId() + ",name:"+current.getName());
32     }
33 
34     @Scheduled(cron="0/5 * * * * ?")
35     public void executeUploadBackTask() {
36 
37         // 间隔3分钟,执行工单上传任务
38         Thread current = Thread.currentThread();
39         System.out.println("定时任务3:"+current.getId());
40         logger.info("ScheduledTest.executeUploadBackTask 定时任务3:"+current.getId()+ ",name:"+current.getName());
41     }
42 }

 

启动定时任务:

 1 package redcord;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 import org.springframework.context.annotation.ComponentScan;
 6 import org.springframework.context.annotation.Configuration;
 7 import org.springframework.context.annotation.ImportResource;
 8 import org.springframework.scheduling.annotation.EnableScheduling;
 9 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
10 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
11 
12 @ComponentScan
13 @SpringBootApplication
14 @EnableScheduling
15 public class ShellApplication extends WebMvcConfigurerAdapter {
16 
17     public static void main(String[] args) {
18         SpringApplication.run(ShellApplication.class, args);
19     }
20 }

其中 @EnableScheduling 注解的作用是发现注解@Scheduled的任务并后台执行。

 

执行结果(单线程执行定时任务):

1 定时任务2:27
2 2017-12-22 11:28:30.002  INFO 7600 --- [pool-2-thread-1] redcord.task.KeepAlive                   : ScheduledTest.executeUploadTask 定时任务2:27,name:pool-2-thread-1
3 定时任务3:27
4 2017-12-22 11:28:30.004  INFO 7600 --- [pool-2-thread-1] redcord.task.KeepAlive                   : ScheduledTest.executeUploadBackTask 定时任务3:27,name:pool-2-thread-1
5 定时任务1:27
6 2017-12-22 11:28:30.006  INFO 7600 --- [pool-2-thread-1] redcord.task.KeepAlive                   : ScheduledTest.executeFileDownLoadTask 定时任务1:27,name:pool-2-thread-1

 

开启线程池执行多线程(applicationContext.xml):

 1 <beans xmlns="http://www.springframework.org/schema/beans"
 2        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3        xmlns:task="http://www.springframework.org/schema/task"
 4        xmlns:context="http://www.springframework.org/schema/context"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">
 6 
 7 
 8     <!-- Enables the Spring Task @Scheduled programming model -->
 9     <task:executor id="executor" pool-size="5" />
10     <task:scheduler id="scheduler" pool-size="10" />
11     <task:annotation-driven executor="executor" scheduler="scheduler" />
12 
13 
14 </beans>

 

引入xml配置文件:

 1 package redcord.xmlResource;
 2 
 3 import org.springframework.context.annotation.Configuration;
 4 import org.springframework.context.annotation.ImportResource;
 5 
 6 /**
 7  * Created by Administrator on 2017-12-22.
 8  */
 9 @Configuration
10 @ImportResource(locations={"classpath:applicationContext.xml"})
11 public class XMLResource {
12 
13 }

 

执行结果:

1 定时任务2:28
2 定时任务3:36
3 定时任务1:37
4 2017-12-22 11:31:15.001  INFO 1504 --- [    scheduler-2] redcord.task.KeepAlive                   : ScheduledTest.executeUploadTask 定时任务2:28,name:scheduler-2
5 2017-12-22 11:31:15.001  INFO 1504 --- [    scheduler-4] redcord.task.KeepAlive                   : ScheduledTest.executeUploadBackTask 定时任务3:36,name:scheduler-4
6 2017-12-22 11:31:15.001  INFO 1504 --- [    scheduler-5] redcord.task.KeepAlive                   : ScheduledTest.executeFileDownLoadTask 定时任务1:37,name:scheduler-5

 

posted @ 2017-12-22 11:32  什么,基地没了?  阅读(147)  评论(0)  编辑  收藏  举报