java定时器的使用(Scheduler )
首先添加所需要的类包:quartz-1.5.2.jar,quartz-all-1.5.2.jar,quartz-jboss-1.5.2.jar
//设置定时作业
public void startScheduler(HttpServletRequest requests)throws SchedulerException{
try{
//建立作业调度器
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
//判断作业调度内是否有作业,如果有将其删除
if (!scheduler.isShutdown()) {
scheduler.deleteJob("ReceiveOnTimed", Scheduler.DEFAULT_GROUP);
}
//删除调度器的作业后,新建一个我们现在要完成的作业,该作业所需要的类是ReceiveJobd.class,作业名字是ReceiveOnTimes,所属分组是Scheduler.DEFAULT_GROUP
JobDetail jobDetail = new JobDetail("ReceiveOnTimed",
Scheduler.DEFAULT_GROUP,
ReceiveJobd.class);
int m = ips.length;
int n = tablenames.length;
//向作业内设置要传入的参数
jobDetail.getJobDataMap().put("scheduler", scheduler);
jobDetail.getJobDataMap().put("ipLength", m);
jobDetail.getJobDataMap().put("tablenameLength", n);
jobDetail.getJobDataMap().put("wcx",wc);
for (int i = 0; i < m; i++) {
jobDetail.getJobDataMap().put("ip" + i, ips[i]);
for (int j = 0; j < n; j++) {
jobDetail.getJobDataMap().put("tablename" + j, tablenames[j]);
}
}
//建立触发器,判断何时触发该作业,参数为触发器的名称,触发器分组,作业名称,作业分组,时间设定
Trigger trigger = new CronTrigger("ReceiverOnTimeTriggerd",
scheduler.DEFAULT_GROUP,
"ReceiveOnTimed",
scheduler.DEFAULT_GROUP, time);
//将作业和触发器添加到调度器
scheduler.scheduleJob(jobDetail, trigger);
//按照设置开始调度
scheduler.start();
}catch(Exception e){
e.printStackTrace();
}
}
具体作业类的处理:
package com.bodhiya.schsystem.business;
import org.quartz.Job;
import org.quartz.JobDataMap;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.Scheduler;
import org.springframework.web.context.WebApplicationContext;
public class ReceiveJobd implements Job{
public void ReceiveJobd(){
}
//作业具体实现的功能
public void execute(JobExecutionContext context) throws
JobExecutionException {
try {
//建立JobDataMap对象,用来接收传递的参数
JobDataMap dataMap = context.getMergedJobDataMap();
int ipLength = dataMap.getInt("ipLength");
int tablenameLength = dataMap.getInt("tablenameLength");
WebApplicationContext wc=(WebApplicationContext)dataMap.get("wcx");
String ip = "";
String tablename = "";
for (int i = 0; i < ipLength; i++) {
ip = dataMap.getString("ip" + i);
for (int j = 0; j < tablenameLength; j++) {
tablename = dataMap.getString("tablename" + j);
ExchangeAccess ea=new ExchangeAccess(ip,tablename,wc);
//启动线程
ea.start();
}
}
Scheduler scheduler = (Scheduler) dataMap.get("scheduler");
scheduler.deleteJob("ReceiveOnTimed", Scheduler.DEFAULT_GROUP);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}