java中 spring 定时任务 实现代码

import org.apache.log4j.*;
public class TaskJob {
       public static Logger log = Logger
                     .getLogger(TaskJob.class);
       public void SayHello() {
              // TODO Auto-generated method stub
              try {
                     log.info("处理任务开始>........");
                     // 业务逻辑代码调用
                     System.out.println("时间[" + new java.util.Date().toLocaleString()
                                   + "]----->大家好啊！");
                     log.info("处理任务结束!");
              } catch (Exception e) {
                     log.error("处理任务出现异常", e);
              }
       }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean name="taskJob" class="util.TaskJob" />
    <bean id="methodInvokingJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
       <property name="targetObject">
           <ref bean="taskJob" />
       </property>
       <property name="targetMethod">
           <value>SayHello</value>
       </property>
    </bean>
    <!-- 配置触发器 -->
    <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
        <!-- 这里不可以直接在属性jobDetail中引用taskJob，因为他要求的是一个jobDetail类型的对象，所以我们得通过MethodInvokingJobDetailFactoryBean来转一下 -->
       <property name="jobDetail">
           <ref bean="methodInvokingJobDetail" />
       </property>
       <!-- 每天的8点到21点每隔1分钟触发，具体说明见附录 -->
       <property name="cronExpression">
           <value>0 * 08-21 * * ?</value>
       </property>
    </bean>
    <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
       <!-- 添加触发器 -->
       <property name="triggers">
           <list>
              <ref local="cronTrigger" />
           </list>
       </property>
    </bean>
</beans>

package util;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestApp {

public static void main(String[] args) {
    // TODO Auto-generated method stub
        System.out.println("加载spring配置文件....");
      ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
      System.out.println("加载配置文件完毕!");
//   ApplicationContext context2 = new ClassPathXmlApplicationContext("test/timerTask/quartzTimer.xml");
}
}

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/classes/applicationContext.xml</param-value>
</context-param>
<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>/WEB-INF/log4j.properties</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>