Springboot (ix): Scheduled Tasks

In our project development process, often need to help us to do some of the tasks, springboot default has been implemented for us, only need to add the corresponding annotations can be implemented

1, POM package configuration

Pom Bag only need to introduce Springboot starter package can

<dependencies><dependency><groupid>org.springframework.boot</groupid><artifactid>spring-boot-starter</ Artifactid></dependency><dependency>< Groupid>org.springframework.boot</groupid><artifactid> Spring-boot-starter-test</artifactid><scope>test </scope></dependency> <dependency> <groupid>org.springframework.boot</groupid> < Artifactid>spring-boot-devtools</artifactid> <optional>true< Span class= "NT" ></optional></dependency></dependencies>  

2. Startup class Enable timing

On start-up class plus to @EnableScheduling turn on timing

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

3. Create a timed Task implementation class

Scheduled Task 1:

   @Component public class schedulertask {private int  Count=0 @Scheduled  (cron= "*/6 * * * * *?" ) private void process () {system.. ( "This is scheduler task runing" + (count< Span class= "O" >++)); }             /span>                

Scheduled Task 2:

@ComponentPublicClassScheduler2task{PrivateStaticFinalSimpleDateFormatdateformat = new simpledateformat ( "HH:mm:ss"  @Scheduled  (fixedrate = 6000< Span class= "O" >) public void reportcurrenttime ( ) {system.. ( "now time:" + dateformat.< Span class= "NA" >format (new date ())); }             /span>                

The results are as follows:

this is scheduler task runing  0现在时间：09:44:17this is scheduler task runing  1现在时间：09:44:23this is scheduler task runing  2现在时间：09:44:29this is scheduler task runing  3现在时间：09:44:35

Parameter description

@ScheduledParameters can accept two timing settings, one that we commonly use, and the other cron="*/6 * * * * ?" is that fixedRate = 6000 both represent printing every six seconds.

Fixedrate description

• @Scheduled(fixedRate = 6000): Executes 6 seconds after the last start point of execution
• @Scheduled(fixedDelay = 6000): Executed 6 seconds after the last execution time.
• @Scheduled(initialDelay=1000, fixedRate=6000): Executes 1 seconds after the first delay, followed by fixedrate rules every 6 seconds

Sample Code-github

Sample code-Cloud Code

Springboot (ix): Scheduled Tasks