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SSM实现定时任务的两种方式
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方式一：在spring-servlet.xml中配置任務(wù)約束，并開啟任務(wù)
| xmlns:task="http://www.springframework.org/schema/task" ? xsi:schemaLocation="http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd " ? <task:annotation-driven/> |
配置好之后，定義任務(wù)類：
| import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component; @Component
public class CzTongjiTask { ?? ?@Scheduled(cron = "0/5 * * * * ? ")
?? ?public void tongjiTask() {
?? ??? ?System.out.println("-----------");
?? ?} } |
?到此，第一種配置定時(shí)任務(wù)結(jié)束。
方式二：創(chuàng)建實(shí)現(xiàn)Job接口的實(shí)現(xiàn)類
| import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.List;
import java.util.Map; import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.support.SpringBeanAutowiringSupport; import mapper.CommonMapper; public class TongjiTaskJob implements Job { ?? ?@Autowired
?? ?private CommonMapper commonMapper; ?? ?public TongjiTaskJob() {
?? ??? ?SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
?? ?} ?? ?@Override
?? ?public void execute(JobExecutionContext context) throws JobExecutionException {
?? ??? ?try {
?? ??? ??? ?System.out.println(calendar.getTime());
?? ??? ?} catch (Exception e) {
?? ??? ??? ?e.printStackTrace();
?? ??? ?} ?? ?} } |
創(chuàng)建任務(wù)管理類，并在該類中執(zhí)行指定的定時(shí)任務(wù)
| import org.apache.log4j.Logger;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.quartz.impl.StdSchedulerFactory;
import org.springframework.stereotype.Component; @Component
public class TimerTaskScheduleManage {
?? ?private final Logger logger = Logger.getLogger(this.getClass()); ?? ?? ?private void AddTongjiTask() {
?? ??? ?String taskId = "TongjiTaskJob";
?? ??? ?String groupName = taskId + "Group";
?? ??? ?try {
?? ??? ??? ?Scheduler scheduler = factory.getScheduler();
?? ??? ??? ?TriggerKey triggerKey = new TriggerKey(taskId, groupName);
?? ??? ??? ?CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);
?? ??? ??? ?if (trigger == null) {
?? ??? ??? ??? ?// 創(chuàng)建工作內(nèi)容
?? ??? ??? ??? ?JobDetail jobDetail = JobBuilder.newJob(TongjiTaskJob.class).withIdentity(taskId, groupName).build();
?? ??? ??? ??? ?// 創(chuàng)建觸發(fā)器
?? ??? ??? ??? ?trigger = TriggerBuilder.newTrigger().withIdentity(taskId, groupName)
?? ??? ??? ??? ??? ??? ?.withSchedule(CronScheduleBuilder.cronSchedule("0 0 2 1/1 * ? ")).build();
?? ??? ??? ??? ?// 粘合工作和觸發(fā)器
?? ??? ??? ??? ?scheduler.scheduleJob(jobDetail, trigger);
?? ??? ??? ??? ?// 啟動(dòng)調(diào)度器
?? ??? ??? ??? ?scheduler.start();
?? ??? ??? ?}
?? ??? ?} catch (Exception e) {
?? ??? ??? ?logger.error("添加TongjiTask定時(shí)任務(wù)異常！" + e.getMessage());
?? ??? ?}
?? ?} ?? ?// 定時(shí)執(zhí)行的方法
?? ?public void execute() {
? ? ? ??
?? ??? ?this.AddTongjiTask();
?? ?}
} |
到此第二種定時(shí)任務(wù)配置結(jié)束，啟動(dòng)項(xiàng)目即可執(zhí)行定時(shí)任務(wù)。
注意：如果不想在第一種方式中執(zhí)行定時(shí)任務(wù)：就把@Scheduled注解注釋掉，在第二種方式中不想指定定時(shí)任務(wù)，就把紅色字體的代碼注釋掉即可
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