(办公)定时任务quartz入门
1.简单入门.
2.定时任务注入service.
入门案例:
1.1. 加jar
<dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.2.3</version> </dependency>
1.2.编写个job任务.
/** * Quartz中的job可以理解为一个任务. */ public class HelloJob implements Job { @Override public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException { //打印当前的时间: Date date = new Date(); SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println("Job Run Time:" + sf.format(date)); //编写具体的业务逻辑. System.out.println("Hello Word!"); } }
1.3 写一个main方法调用任务:
public static void main(String[] args){ //1.创建一个JobDetail实例,将该实例与HelloJob Class绑定. JobDetail jobDetail = JobBuilder.newJob(HelloJob.class) .withIdentity("myjob", "group1").build(); //withIdentity 创建名字,以什么组入伙,build()创建. //2.创建Trigger实例,主要用来,定义job执行. //每隔2秒重复执行一次, // 解释:因为不同类,所以并不是同一个组的. // startNow 立即执行. // repeatForever 不间断. // withIntervalInSeconds 时间间隔秒,执行. Trigger trigger = TriggerBuilder.newTrigger() .withIdentity("mytrigger","group1") .startNow().withSchedule( SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(2).repeatForever() ).build(); // 3.创建scheduler 实例: SchedulerFactory sfactory = new StdSchedulerFactory(); try { Scheduler scheduler = sfactory.getScheduler(); scheduler.start();//执行. scheduler.scheduleJob(jobDetail,trigger);//绑定要执行的任务. } catch (SchedulerException e) { e.printStackTrace(); } }
接下来,再来一个简单的springmvc与quartz的结合.
1.第一步,加入核心的jar. spring上下文. <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> spring事务: <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> 定时任务: <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.2.3</version> </dependency> 2.Quartz配置作业: 2.1. AnotherBean类 import org.springframework.stereotype.Component; @Component("anotherBean") public class AnotherBean { public void printAnotherMessage() { System.out.println("AnotherMessage"); } } 2.2.FirstScheduledJob类 import java.text.SimpleDateFormat; import java.util.Date; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import org.springframework.scheduling.quartz.QuartzJobBean; public class FirstScheduledJob extends QuartzJobBean{ private AnotherBean anotherBean; public void setAnotherBean(AnotherBean anotherBean){ this.anotherBean = anotherBean; } @Override protected void executeInternal(JobExecutionContext arg0) throws JobExecutionException { Date date = new Date(); SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println("10 :FirstScheduledJob Executes!" + sf.format(date)); this.anotherBean.printAnotherMessage(); } } 2.3.MyBean import java.text.SimpleDateFormat; import java.util.Date; import org.springframework.stereotype.Component; @Component("myBean") public class MyBean { public void printMessage() { // 打印当前的执行时间，格式为2017-01-01 00:00:00 Date date = new Date(); SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println("MyBean Executes!" + sf.format(date)); } } 2.4.配置文件里配置一下: <bean id="simpleJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> <property name="targetObject" ref="myBean" /> <property name="targetMethod" value="printMessage" /> </bean> <bean id="firstComplexJobDetail" class="org.springframework.scheduling.quartz.JobDetailFactoryBean"> <property name="jobClass" value="com.imooc.springquartz.quartz.FirstScheduledJob" /> <property name="jobDataMap"> <map> <entry key="anotherBean" value-ref="anotherBean" /> </map> </property> <property name="Durability" value="true"/> </bean> <!-- 距离当前时间1秒之后执行，之后每隔两秒钟执行一次 --> <bean id="mySimpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerFactoryBean"> <property name="jobDetail" ref="simpleJobDetail"/> <property name="startDelay" value="1000"/> <property name="repeatInterval" value="2000"/> </bean> <!-- 每隔5秒钟执行一次 --> <bean id="myCronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean"> <property name="jobDetail" ref="firstComplexJobDetail"/> <property name="cronExpression" value="0 0/3 * * * ? *"/> </bean> <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="jobDetails"> <list> <ref bean="simpleJobDetail"/> <ref bean="firstComplexJobDetail"/> </list> </property> <property name="triggers"> <list> <!-- <ref bean="mySimpleTrigger"/> --> <ref bean="myCronTrigger"/> </list> </property> </bean>
2.1 定时任务注入service,注入service,为null?
import org.quartz.spi.TriggerFiredBundle; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.config.AutowireCapableBeanFactory; import org.springframework.scheduling.quartz.AdaptableJobFactory; public class MyJobFactory extends AdaptableJobFactory { //这个对象Spring会帮我们自动注入进来,也属于Spring技术范畴. @Autowired private AutowireCapableBeanFactory capableBeanFactory; protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception { //调用父类的方法 Object jobInstance = super.createJobInstance(bundle); //进行注入,这属于Spring的技术,不清楚的可以查看Spring的API. capableBeanFactory.autowireBean(jobInstance); return jobInstance; } }
放到bean里 <bean id="jobFactory" class="cn.wz.ssm.quartz.MyJobFactory"></bean>
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="jobFactory" ref="jobFactory"></property>
然后注入的service就可以使用了。
分享一个:http://cron.qqe2.com/ 写定时任务表达式的网址。
本篇文章,通过东拼西凑,瞎划拉资料,不过东西测试过了,可以使用.
