Tasks in Springboot (asynchronous tasks-Scheduled Tasks-mail tasks)

1.pom file

<?XML version= "1.0" encoding= "UTF-8"?><Projectxmlns= "http://maven.apache.org/POM/4.0.0"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xsi:schemalocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelversion>4.0.0</modelversion>    <groupId>Com.zy</groupId>    <Artifactid>Spring-boot-task-demo</Artifactid>    <version>0.0.1-snapshot</version>    <Packaging>Jar</Packaging>    <name>Spring-boot-task-demo</name>    <Description>Demo Project for Spring Boot</Description>    <Parent>        <groupId>Org.springframework.boot</groupId>        <Artifactid>Spring-boot-starter-parent</Artifactid>        <version>2.0.4.RELEASE</version>        <RelativePath/> <!--Lookup parent from repository -    </Parent>    <Properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>        <java.version>1.8</java.version>    </Properties>    <Dependencies>        <Dependency>            <groupId>Org.springframework.boot</groupId>            <Artifactid>Spring-boot-starter-web</Artifactid>        </Dependency>        <Dependency>            <groupId>Org.springframework.boot</groupId>            <Artifactid>Spring-boot-starter-test</Artifactid>            <Scope>Test</Scope>        </Dependency>    </Dependencies>    <Build>        <Plugins>            <plugin>                <groupId>Org.springframework.boot</groupId>                <Artifactid>Spring-boot-maven-plugin</Artifactid>            </plugin>        </Plugins>    </Build></Project>

2. Startup class

 Package Com.zy; Import org.springframework.boot.SpringApplication; Import org.springframework.boot.autoconfigure.SpringBootApplication; Import Org.springframework.scheduling.annotation.EnableAsync; @SpringBootApplication // supports asynchronous threads, which require an asynchronous invocation of the service layer method with @async annotations, which are combined to work @EnableAsync

To turn on annotation-based scheduled tasks
@EnableScheduling

 Public class  publicstaticvoid  main (string[] args) {Springapplication.run ( Springboottaskdemoapplication. class , args); } }

3.controller Test class

 PackageCom.zy.controller;ImportCom.zy.service.AsyncServiceImpl;Importorg.springframework.beans.factory.annotation.Autowired;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.bind.annotation.RestController; @RequestMapping ("/task/") @RestController Public classAsynccontroller {@AutowiredPrivateAsyncserviceimpl Asyncservice; @RequestMapping ("/async")     PublicObject Async (String name) {returnname; }}

4.service Layer

4.1 Asynchronous task Implementation classes

 PackageCom.zy.service;ImportOrg.springframework.scheduling.annotation.Async;ImportOrg.springframework.stereotype.Service; @Service ("Asyncservice") Public classAsyncserviceimpl {@Async Publicstring Async (string name) {Try{Thread.Sleep (5000); } Catch(interruptedexception e) {e.printstacktrace (); }        return"Good Morning:" +name; }}

4.2 Timing Task Implementation class

 PackageCom.zy.service;Importorg.springframework.scheduling.annotation.Scheduled;ImportOrg.springframework.stereotype.Service; @Service Public classScheduledserviceimpl {/*** Second (sec), Minute (min), hour (time), day of month, month (months), Days of Week (weeks). * 0 * * * * Mon-fri * "0 0/5 14,18 * *" 14 o'clock daily, and 18 o'clock full, every 5 minutes * "0 15 10? * 1-6 "Every month from Monday to Saturday 10:15 run once *" 0 0 2? * 6L "Last Saturday 2 o'clock in the morning every month * *" 0 0 2 LW *? "The last working day of each month is performed 2 o'clock in the morning once *" 0 0 2-4? * 1#1 "The first month of Monday from 2 o'clock in the morning to 4, each hour is executed once;*/    //@Scheduled (cron = "0 * * * * * MON-SAT")//@Scheduled (cron = "0,1,2,3,4 * * * * * MON-SAT")//@Scheduled (cron = "0-4 * * * * * MON-SAT")@Scheduled (Cron= "0/50 * * * * MON-SAT")//executes once every 50 seconds     Public voidSayschedule () {System.out.println ("Sayschedule"); }}

Tasks in Springboot (asynchronous tasks-Scheduled Tasks-mail tasks)