Spring--简单使用quartz实现定时作业[z]

From: www.blogjava.net/javaora/archive/2005/07/20/8070.aspx

定时批处理作业是J2EE企业应用里很重要的一环，用来在晚间进行财务挂账，数据转存，新闻联播等等操作。

    而在Spring里，已经很好的集成了Quartz，简单到像配cron一样，在xml文件里面配一下时间就可以自动执行，不需要写一行代码。Spring对Quartz大刀阔斧的简化堪称范例，Quartz项目组也许可以学习一下。

      
 

  xml 代码
 
 
<bean id="methodInvokingJobDetail"
       class="org.springframework.scheduling.
                  quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject"><ref bean="financeDAO"/>property>
<property name="targetMethod"><value>confirmOrdervalue>property>
bean>
<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
        <property name="jobDetail">
            <ref bean="methodInvokingJobDetail"/>
        property>
        <property name="cronExpression">
            <value>0 0 6,12,20 * * ?value>
        property>
bean>
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list><ref local="cronTrigger"/>list>
        property>
bean>
    

上面这段配置文件规定了在早上6点和晚上8点执行financeDAO对象的confirmOrder()方法.

附：cronExpression配置说明

字段   允许值   允许的特殊字符

秒		0-59		, - * /
分		0-59		, - * /
小时		0-23		, - * /
日期		1-31		, - * ? / L W C
月份		1-12 或者 JAN-DEC		, - * /
星期		1-7 或者 SUN-SAT		, - * ? / L C #
年（可选）		留空, 1970-2099		, - * /

The '*' character is used to specify all values. For example, "*" in the minute field means "every minute".
“*”字符被用来指定所有的值。如：”*“在分钟的字段域里表示“每分钟”。
The '?' character is allowed for the day-of-month and day-of-week fields. It is used to specify 'no specific value'. This is useful when you need to specify something in one of the two fileds, but not the other. See the examples below for clarification.
“?”字符只在日期域和星期域中使用。它被用来指定“非明确的值”。当你需要通过在这两个域中的一个来指定一些东西的时候，它是有用的。看下面的例子你就会明白。
The '-' character is used to specify ranges For example "10-12" in the hour field means "the hours 10, 11 and 12".
“-”字符被用来指定一个范围。如：“10-12”在小时域意味着“10点、11点、12点”。
The ',' character is used to specify additional values. For example "MON,WED,FRI" in the day-of-week field means "the days Monday, Wednesday, and Friday".
“,”字符被用来指定另外的值。如：“MON,WED,FRI”在星期域里表示”星期一、星期三、星期五”.
The '/' character is used to specify increments. For example "0/15" in the seconds field means "the seconds 0, 15, 30, and 45". And "5/15" in the seconds field means "the seconds 5, 20, 35, and 50". Specifying '*' before the '/' is equivalent to specifying 0 is the value to start with. Essentially, for each field in the expression, there is a set of numbers that can be turned on or off. For seconds and minutes, the numbers range from 0 to 59. For hours 0 to 23, for days of the month 0 to 31, and for months 1 to 12. The "/" character simply helps you turn on every "nth" value in the given set. Thus "7/6" in the month field only turns on month "7", it does NOT mean every 6th month, please note that subtlety.
The 'L' character is allowed for the day-of-month and day-of-week fields. This character is short-hand for "last", but it has different meaning in each of the two fields. For example, the value "L" in the day-of-month field means "the last day of the month" - day 31 for January, day 28 for February on non-leap years. If used in the day-of-week field by itself, it simply means "7" or "SAT". But if used in the day-of-week field after another value, it means "the last xxx day of the month" - for example "6L" means "the last friday of the month". When using the 'L' option, it is important not to specify lists, or ranges of values, as you'll get confusing results.