quartz + spring定時任務調度

最近要用到squartz來配置定時任務調度，網上搜了許多資料，也查了許多實例代碼，大抵基本的調度代碼都以下所示：

以下代碼轉自：http://blog.csdn.net/sambino/article/details/3934670，sambino的專欄。

 1. javabean類
                  在Test.QuartzJob中

           package Test;

           public class QuartzJob {
              public void work()
              {
                    System.out.println("Quartz的任務調度！！！");
                 }
            }

      2. 設置Spring的xml
            我新建了一個applicationContext_quartz.xml，內容以下：

<?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:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.0.xsd">

        <!-- 要調用的工做類 -->
        <bean id="quartzJob" class="Test.QuartzJob"></bean>
        <!-- 定義調用對象和調用對象的方法 -->
        <bean id="jobtask" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
            <!-- 調用的類 -->
            <property name="targetObject">
                <ref bean="quartzJob"/>
            </property>
            <!-- 調用類中的方法 -->
            <property name="targetMethod">
                <value>work</value>
            </property>
        </bean>
        <!-- 定義觸發時間 -->
        <bean id="doTime" class="org.springframework.scheduling.quartz.CronTriggerBean">
            <property name="jobDetail">
                <ref bean="jobtask"/>
            </property>
            <!-- cron表達式 -->
            <property name="cronExpression">
                <!-- 每隔10秒執行一次-->
                <value>0/10 * * * * ?</value>
            </property>
        </bean>
        <!-- 總管理類 若是將lazy-init='false'那麼容器啓動就會執行調度程序 -->
        <bean id="startQuertz" lazy-init="false" autowire="no" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
            <property name="triggers">
                <list>
                    <ref bean="doTime"/>
                </list>
            </property>
        </bean>
  
</beans>

       3. 設置web.xml對Spring加載

<!-- 加載spring -->
<context-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>
    /WEB-INF/classes/applicationContext*.xml
   </param-value>
</context-param>
<servlet>
   <servlet-name>context</servlet-name>
   <servlet-class>
    org.springframework.web.context.ContextLoaderServlet
   </servlet-class>
   <load-on-startup>1</load-on-startup>
</servlet>

注意：1.導入quartz-all-1.5.2.jar  下載http://download.csdn.net/source/1026766
           2.導入spring.jar（我用的是spring2.0之前的版本）  下載http://download.csdn.net/source/1041819
              若是不導入的話
               org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean
              org.springframework.scheduling.quartz.CronTriggerBean
              org.springframework.scheduling.quartz.SchedulerFactoryBean
              spring中的這三個類找不到，spring不能正常加載，因爲第一次使用Quartz，我就是當時忽略了這一點，浪費了不少時間來調配置，其實配置一點沒有錯誤。
            3. 你會問爲何用spring後就不用
                quartz.properties
                quartz-jobsxml   
                這兩個文件了麼？
                我回答：是的，它會自動找到quartz包中默認的這兩個文件，若是你有特殊須要，也能夠本身定義這兩個文件。

附：quartz.properties
#
# Configure Main Scheduler Properties
#

org.quartz.scheduler.instanceName = TestScheduler
org.quartz.scheduler.instanceId = one

#
# Configure ThreadPool
#

org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 5
org.quartz.threadPool.threadPriority = 4

#
# Configure JobStore
#

#org.quartz.jobStore.misfireThreshold = 5000

#org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

# ===========================================================================
# Configure SchedulerPlugins ===============================================
# ===========================================================================
#org.quartz.plugin.triggHistory.class = org.quartz.plugins.history.LoggingTriggerHistoryPlugin
#org.quartz.plugin.triggHistory.triggerFiredMessage = Trigger {1}.{0} fired job {6}.{5} at: {4, date, HH:mm:ss MM/dd/yyyy}
#org.quartz.plugin.triggHistory.triggerCompleteMessage = Trigger {1}.{0} completed firing job {6}.{5} at {4, date, HH:mm:ss MM/dd/yyyy} with resulting trigger instruction code: {9}

org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.JobInitializationPlugin
org.quartz.plugin.jobInitializer.fileName =quartz_jobs.xml
org.quartz.plugin.jobInitializer.overWriteExistingJobs = false
org.quartz.plugin.jobInitializer.failOnFileNotFound = true

org.quartz.plugin.shutdownhook.class = org.quartz.plugins.management.ShutdownHookPlugin
org.quartz.plugin.shutdownhook.cleanShutdown = true

系統會根據配置文件找到quartz_jobs.xml

     配置以後，發現老是報錯：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' defined in ServletContext resource [/WEB-INF/spring/applicationContext-others.xml]: Invocation of init method failed; nested exception is org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.impl.jdbcjobstore.LockException: Failure obtaining db row lock: Table 'lbassnew.qrtz_locks' doesn't exist [See nested exception: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Table 'lbassnew.qrtz_locks' doesn't exist]]

    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420)

瀏覽了一翻配置文件，發現項目原先已經有相關的quartz配置代碼，因而將本身配置的SchedulerFactoryBean去掉，直接將配置的調度器放入已有的SchedulerFactoryBean中，啓動，無錯。

其次，在配置調度時間的時候，若是配置的啓動時間爲：0 50-55 16 * * ?那麼，即時配置的 <property name="concurrent" value="true"/> ，啓動以後也須要等待到配置的時間纔會啓動任務。特此記錄。