/** 
 * 继承TimerTask实现定时任务 
 */ 
public class MyTask extends TimerTask { 
 
  @Override 
  public void run() { 
    String currentTime = new SimpleDateFormat("yyy-MM-dd hh:mm:ss").format(new Date()); 
    System.out.println(currentTime + " 定时任务正在执行..."); 
  } 
 
  public static void main(String[] args) { 
    Timer timer = new Timer(); 
     
    // 1秒钟执行一次的任务, 参数为: task, delay, peroid 
    timer.schedule(new MyTask(), 2000, 1000); 
  } 
} 

/** 
 * 定时调度业务类 
 */ 
public class TaskService extends TimerTask { 
  private int count = 1; 
 
  public void run() { 
    System.out.println("第" + count + "次执行定时任务"); 
    count++; 
  } 
} 

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
  xsi:schemaLocation="http://www.springframework.org/schema/beans  
  http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 
   
  <bean id="taskService" class="com.zdp.service.TaskService"></bean> 
  <bean id="scheduledTimerTask" class="org.springframework.scheduling.timer.ScheduledTimerTask"> 
    <property name="timerTask" ref="taskService" /> 
     
    <!-- 每隔一天执行一次配置: 24*60*60*1000 --> 
    <!-- 每1秒钟程序执行一次 --> 
    <property name="period" value="1000" /> 
     
    <!-- 程序启动4秒钟后开始执行 --> 
    <property name="delay" value="4000" /> 
  </bean> 
   
  <bean id="timerFactoryBean" class="org.springframework.scheduling.timer.TimerFactoryBean"> 
    <property name="scheduledTimerTasks"> 
      <list> 
        <ref bean="scheduledTimerTask" /> 
      </list> 
    </property> 
  </bean> 
</beans> 

public class Main { 
  public static void main(String[] args) { 
    // 加载spring配置文件 
    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); 
    System.out.println("<<-------- 启动定时任务 -------- >>"); 
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); 
    while (true) { 
      try { 
        if (reader.readLine().equals("quit")) { 
          System.out.println("<<-------- 退出定时任务 -------- >>"); 
          System.exit(0); 
        } 
      } catch (IOException e) { 
        throw new RuntimeException("error happens...", e); 
      } 
    } 
  } 
}