利用Spring进行Quartz定时开发的两种方式进行讲解

利用Spring进行Quartz定时开发的两种方式进行讲解
Spring+Quartz结合方式，大体有两种方式可以达到定时任务功能

1 借助于Spring的org.springframework.scheduling.quartz.JobDetailBean的类功能，继承Spring封装Quartz的org.springframework.scheduling.quartz.QuartzJobBean类,要实现executeInternal方法，并把其中涉及到需要定时任务处理的功能放入其中


Spring配置如下：

1
2 <bean id="saveProjectJob"
3 class="org.springframework.scheduling.quartz.JobDetailBean">
4 <property name="jobClass">
5 <value>
6 com.gresoft.components.fileupload.service.ParseFileQuartz
7 </value>
8 </property>
9 <property name="jobDataAsMap">
10 <map>
11 <entry key="readXmlService">
12 <ref bean="readXmlService" />
13 </entry>
14 </map>
15 </property>
16 </bean>
17 <bean id="saveCron"
18 class="org.springframework.scheduling.quartz.CronTriggerBean">
19 <property name="jobDetail">
20 <ref local="saveProjectJob" />
21 </property>
22 <property name="cronExpression">
23 <value>0/30 * * * * ? </value>
24 </property>
25 </bean>
26 <bean id="scheduler"
27 class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
28 <property name="triggers">
29 <ref local="saveCron" />
30 </property>
31 </bean>
注意上述红色字体 <map>结点，这里主要是为了在定时任务需要使用到Bean,通过Spring给注入进来，如果不写明，就会报
java.lang.NullPointerException错误，主要是因为没有注入Bean


方法代码如下:

1package com.gresoft.components.fileupload.service;
2
3import org.quartz.JobExecutionContext;
4import org.quartz.JobExecutionException;
5import org.springframework.scheduling.quartz.QuartzJobBean;
6
7public class ParseFileQuartz extends QuartzJobBean {
8 private readXmlService readXmlService;
9
10 @Override
11 protected void executeInternal(JobExecutionContext jobexecutioncontext)
12 throws JobExecutionException {
13 // TODO Auto-generated method stub
14 // System.out.println(genderManager.get(1).getGenderName());
15 readXmlService.refreshFileList("D:/tomcat/webapps/sanitation/upload");
16 }
17
18 public void setReadXmlService(readXmlService readXmlService) {
19 this.readXmlService = readXmlService;
20 }
21}
22

2 借助于Spring 的org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean类，使用此方法使开发人员对Quartz完全透明，需要实现定时任务的方法只是一个普通方法

Spring配置文件如下：

1 <?xml version="1.0" encoding="UTF-8"?>
2 <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
3 <beans>
4
5 <bean id="saveProjectJob"
6 class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
7 <property name="targetObject">
8 <ref local="parseQuartz" />
9
10 </property>
11 <property name="targetMethod">
12 <value>execute </value>
13 </property>
14
15
16 </bean>
17 <bean id="parseQuartz" class="com.gresoft.components.fileupload.service.ParseFileQuartzOther">
18 <property name="readXmlService" ref="readXmlService" />
19 </bean>
20 <bean id="saveCron"
21 class="org.springframework.scheduling.quartz.CronTriggerBean">
22 <property name="jobDetail">
23 <ref local="saveProjectJob" />
24 </property>
25 <property name="cronExpression">
26 <value>0/30 * * * * ? </value>
27 </property>
28 </bean>
29 <bean id="scheduler"
30 class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
31 <property name="triggers">
32 <ref local="saveCron" />
33 </property>
34 </bean>
35
业务代码如下：

1package com.gresoft.components.fileupload.service;
2
3public class ParseFileQuartzOther {
4 private readXmlService readXmlService;
5
6
7 public void execute(){
8 // TODO Auto-generated method stub
9 // System.out.println(genderManager.get(1).getGenderName());
10 readXmlService.refreshFileList("D:/tomcat/webapps/sanitation/upload");
11 }
12
13 public void setReadXmlService(readXmlService readXmlService) {
14 this.readXmlService = readXmlService;
15 }
16}
17

以上就是结合Spring使用Quartz编写定时任务两种方式，Spring很好的封装使用Quartz的细节，第一种方式是利用SPring封装的Quartz类进行特定方法的实现，第二种是通过透明的使用Quartz达到定时任务
转：http://www.unix-center.net/bbs/viewthread.php?tid=16839