Quartz 是一個開源的作業調度框架,能夠用它來爲執行一個作業而創建簡單的或複雜的調度。不囉嗦了,這裏就不做簡介了,直接進入主題!網上的一些代碼看的比較費勁,對於初學的人很費勁,所以搞了一個mini版本的,本文就是圍繞Quartz(與Spring結合)實現一個簡單的定時任務!
1 引入pom文件
<properties>
<spring.version>4.0.5.RELEASE</spring.version>
<quartz.version>2.2.1</quartz.version>
</properties>
1.1 Spring(4.0.5)
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
1.2 Quartz(2.2.1)
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>${quartz.version}</version>
</dependency>
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz-jobs</artifactId>
<version>${quartz.version}</version>
</dependency>
備註:spring3.1以上版本才支持 quartz 2.x;spring 3.1以下請使用quartz1.x
2 定時任務類的實現
在Spring中使用Quartz有兩種方式實現:第一種是任務類繼承QuartzJobBean,第二種則是在配置文件裏定義任務類和要執行的方法,類和方法仍然是普通類。本文采用第二種方式,首先寫一個簡單的Mission類(定時任務的具體實現):
public class Mission {
protected void execute() {
System.out.println("process the timer task at [" + dateFormat() + "]");
}
/**
* record the time of message
*
* @return
*/
private String dateFormat() {
long time = System.currentTimeMillis();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = new Date(time);
return sdf.format(date);
}
}
3 配置文件(spring.xml)
<bean id="SpringQtzJob" class="com.quartz.demo.Mission"/>
<bean id="SpringQtzJobMethod" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject">
<ref bean="SpringQtzJob"/>
</property>
<property name="targetMethod"> <!-- 要執行的方法名稱 -->
<value>execute</value>
</property>
</bean>
<!-- ======================== 調度觸發器 ======================== -->
<bean id="CronTriggerBean" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="SpringQtzJobMethod"></property>
<property name="cronExpression" value="0/5 * * * * ?"></property> <!--cron表達式-->
</bean>
<!-- ======================== 調度工廠 ======================== -->
<bean id="SpringJobSchedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="CronTriggerBean"/>
</list>
</property>
</bean>
4 測試
在這裏我直接寫一個類運行它的main方法,在該類中加載sping的配置文件。
@Service
@ImportResource("classpath:spring.xml")
public class TaskEnter {
@SuppressWarnings("resource")
public static void main(String[] args) throws InterruptedException {
/**
* load spring
*/
ApplicationContext context = new AnnotationConfigApplicationContext(TaskEnter.class);
TaskEnter taskEnter = context.getBean(TaskEnter.class);
System.out.println("start process...");
TimeUnit.SECONDS.sleep(10000);
}
}
查看運行結果: