spring定时器的动态设置

spring还是以整合已有的框架为主，它对时间的设置比较灵活。
在spring中，可以继承QuartzJobBean，也可以不做任何继承，当然写法也不一样，这里用的非继承的写法。
定时器的注册过程：1.创建bean，2.声明bean为一个定时器，3.设置任务时间，4.在调度中注册定时器

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<?xml version="1.0" encoding="utf-8"?>  
 
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd        http://www.springframework.org/schema/tx http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">    
  <bean id="mySessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">   
    <property name="configLocation" value="classpath:hibernate.cfg.xml"/>    
  </bean>    
  <bean id="myTxManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">   
    <property name="sessionFactory" ref="mySessionFactory"/>   
  </bean>    
    
    <tx:advice id="txAdvice" transaction-manager="myTxManager">   
    <tx:attributes>   
      <tx:method name="find*" propagation="REQUIRED" read-only="true"/>    
      <tx:method name="get*" propagation="REQUIRED" read-only="true"/>    
      <tx:method name="save*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>  
      <tx:method name="audit*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>    
      <tx:method name="do*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>    
      <tx:method name="add*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>    
      <tx:method name="modify*" propagation="REQUIRED" read-only="false" rollback-for="com.HXSException"/>    
      <tx:method name="delete*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>    
      <tx:method name="create*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>    
      <tx:method name="update*" propagation="REQUIRED" read-only="false" rollback-for="com.HXException"/>    
      <tx:method name="*" propagation="SUPPORTS" read-only="true"/>   
    </tx:attributes>   
  </tx:advice>  
    
  <aop:config>   
    <aop:pointcut id="systemServiceMethods" expression="execution(* com.*.*(..))"/>    
    <aop:advisor advice-ref="txAdvice" pointcut-ref="systemServiceMethods"/>   
  </aop:config>     
 
   <bean id="testJob" class="org.springframework.scheduling.quartz.JobDetailBean">   
    <property name="jobClass" value="web.testJob"/>    
    <property name="jobDataAsMap">   
      <map>   
        <entry key="ftpConfigService">  
            <ref bean="ftpConfigService"/>  
        </entry>  
      </map>   
    </property>   
  </bean>  
    
  <bean id="testJob1" class="org.springframework.scheduling.quartz.JobDetailBean">   
    <property name="jobClass" value="web.test1Job"/>    
    <property name="jobDataAsMap">   
      <map>   
        <entry key="ftpConfigService">  
            <ref bean="ftpConfigService"/>  
        </entry>  
      </map>   
    </property>  

</bean>  
 
<bean id="testTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">   
    <property name="jobDetail" ref="testJob"/>    
    <property name="cronExpression" value="0 19 8,9,19,20 * * ?"/>   
</bean>  
<bean id="testTrigger1" class="org.springframework.scheduling.quartz.CronTriggerBean">   
    <property name="jobDetail" ref="testJob"/>    
    <property name="cronExpression" value="0 18 8,9,19,20 * * ?"/>   
</bean>  
<bean id="testTrigger2" class="org.springframework.scheduling.quartz.CronTriggerBean">   
    <property name="jobDetail" ref="testJob1"/>    
    <property name="cronExpression" value="0 17 8,9,19,20 * * ?"/>   
</bean>    
 
  <!--   
<bean id="testTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">   
   <property name="jobDetail" ref="testJob"/>     
   <property name="startDelay" value="6000"/>    
   <property name="repeatInterval" value="3000"/>   
</bean>   
-->  
   <bean id="facbean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">   
    <property name="triggers">   
            <list>  
                <ref bean="testTrigger"/>  
                <ref bean="testTrigger1"/>  
                <ref bean="testTrigger2"/>  
            </list>  
        </property>  
  </bean>  
   
<bean id="ftpConfigDAO" scope="prototype" class="com.FtpConfigHibernateDAO">  
<property name="sessionFactory">  
    <ref local="mySessionFactory" />  
</property>  
</bean>  
<bean id="ftpConfigService" scope="prototype" class="com.FtpConfigServiceSpringImp">  
<property name="ftpConfigDAO">  
    <ref local="ftpConfigDAO"/>  
</property>  
</bean>  
<beans> 
================================================================
public class testJob extends QuartzJobBean{  
    private IFtpConfigService ftpConfigService;  
      
 
    public IFtpConfigService getFtpConfigService() {  
        return ftpConfigService;  
    }  
 
 
    public void setFtpConfigService(IFtpConfigService ftpConfigService) {  
        this.ftpConfigService = ftpConfigService;  
    }  
 
 
    @Override  
    protected void executeInternal(JobExecutionContext arg0)  
            throws JobExecutionException {  
        System.out.println("执行================");  
        try{  
            FtpConfig ftp = this.getFtpConfigService().findFtpConfigById("2");  
            System.out.println(ftp.getFtpUrl());  
        }catch(Exception e){}  
          
    }  
===========================================================
public class testservlet extends HttpServlet{  
 
    @Override 
    protected void doGet(HttpServletRequest request, HttpServletResponse response)  
            throws ServletException, IOException {    
        response.setContentType("text/html;charset=utf-8");  
        String time = request.getParameter("time");  
        WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());           
        try{  
              
            SchedulerFactoryBean jobFact = (SchedulerFactoryBean)ctx.getBean("&facbean");  
              
            CronTriggerBean bean = (CronTriggerBean)ctx.getBean("testTrigger");  
            String newVal = "0 16 8,9,19,20 * * ?";  
            bean.setCronExpression(newVal);  
              
            jobFact.destroy();    
            jobFact.afterPropertiesSet();  
              
        }catch(Exception e){  
            e.printStackTrace();  
        }  
          
        response.sendRedirect("succ.jsp");  
    }  
 
    @Override 
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)  
            throws ServletException, IOException {         
        doGet(req,resp);  
    }   
}