1.web.xml中配置listener
<listener>
<listener-class>
cn.com.jxlife.shs.web.action.csinquiry.surrender.MyListener
</listener-class>
</listener>
2.創建listener
import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class MyListener implements ServletContextListener {
private Timer timer = null;
@Override
public void contextInitialized(ServletContextEvent sce) {
timer = new Timer(true);
//設置任務計劃，啟動和間隔時間
timer.schedule(new MyTask(), 0, 3*60*1000);
//3分鐘
//timer.schedule(new MyTask(), 0, 3*60*1000);
//在1秒後執行此任務,每次間隔2秒
//timer.schedule(new MyTask(), 1000, 2000);
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
timer.cancel();
}
}
3.創建啟動的類MyTask
import java.util.Date;
import java.util.TimerTask;
public class MyTask extends TimerTask {
@Override
public void run() {
System.out.println("call at " + (new Date()));
}
}
方法二：
spring 下實現定時工作的調度框架quartz
· 1。從.machome.quartz;
public class CustomJob1 {
public void onTimeWork() {
System.out.println("數據備份任務啟動");
System.out.println("...");
System.out.println("數據備份任務完成");
}
}
· 4。剩余的工作就都在spring xml文件裏完成了
<!-- 被調度的bean -->
<bean id="job1" class="com.machome.quartz.CustomJob1"></bean>
<!-- 定義任務對象 -->
<bean id="jobtask1"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<!-- 被調度的bean -->
<property name="targetObject">
<ref bean="job1" />
</property>
<!-- 被調度的bean中的被調度的方法 -->
<property name="targetMethod">
<value>onTimeWork</value>
</property>
</bean>
<!-- 定義觸發對象 -->
<bean id="trigger1"
class="org.springframework.scheduling.quartz.CronTriggerBean">
<!-- 任務對象 -->
<property name="jobDetail">
<ref bean="jobtask1" />
</property>
<!-- cron表達式 -->
<property name="cronExpression">
<value>10,15,20,25,30,35,40,45,50,55 * * * * ?</value>
</property>
</bean>
<!-- 調度對象 -->
<!-- 如果將lazy-init='false'那麽容器啟動就會執行調度程序 -->
<bean id="scheduler" lazy-init="false"
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<!-- 觸發對象 -->
<property name="triggers">
<list>
<ref bean="trigger1" />
</list>
</property>
</bean>
· 5。 將spring 項目部署到TOMCAT或JBOSS服務器上
deploy項目
重啟TOMCAT server
· 6。看結果:
cron表達式參考：Quartz的cron表達式