quartz job 注入 spring 管理的 bean_quartz job注入bean-优快云博客

转载自 https://blog.youkuaiyun.com/leocnx/article/details/54573275

背景：

在quartz job 里调用spring 容器管理的bean，出现空指针异常，即没有注入成功，在网上搜了很多类似的问题，最终发现都是copy改，经过各种折腾算是解决了问题。

解决方法有两种：

第一种方式：不去继承QuartzJobBean，只是一个独立的job bean，通过配置MethodInvokingJobDetailFactoryBean来实现；

第二种方式：继承QuartzJobBean，但是要重写SchedulerFactoryBean的jobFactory。

首先说明下版本：

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<spring.version>4.0.2.RELEASE</spring.version>
<quartz.version>2.2.2</quartz.version>

代码结构如下：

说明：

MyJobAlone为不用继承方式实现的job bean

MyJobExtend为使用继承方式实现的job bean

MyQuartzJobFactory为重写的jobFactory，用于实现在使用继承方式时注入spring管理的bean

SayServiceImpl为spring 管理的bean

-SayService.java

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package top.auok.quartz.bean;
public interface SayService {
void sayHello();
}

-SayServiceImpl.java

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package top.auok.quartz.bean;
import org.springframework.stereotype.Service;
@Service("sayService")
public class SayServiceImpl implements SayService {
@Override
public void sayHello() {
System.out.println("hello, i'm invoked by quartz.");
}
}

-applicationContext.xml

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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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
<context:component-scan base-package="top.auok.quartz" />
</beans>

applicationContext-quartz-alone.xml为非继承方式的配置文件

applicationContext-quartz-extend.xml为继承方式的配置文件

第一种方式：（非继承）

1.job bean - MyJobAlone.java代码如下：

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package top.auok.quartz;
import javax.annotation.Resource;
import org.springframework.stereotype.Component;
import top.auok.quartz.bean.SayService;
@Component("myJobAlone")
public class MyJobAlone {
@Resource
private SayService sayService;
public void execute() {
sayService.sayHello();
}
}

2.配置 - applicationContext-quartz-alone.xml：

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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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
<bean id="aloneJobDetail"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject">
<ref bean="myJobAlone" />
</property>
<property name="targetMethod">
<value>execute</value>
</property>
</bean>
<bean id="aloneTrigger"
class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="aloneJobDetail"></property>
<property name="cronExpression" value="0/2 * * * * ?"></property>
</bean>
<bean id="SpringJobSchedulerFactoryBean"
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="aloneTrigger" />
</list>
</property>
</bean>
</beans>

第二种方式：（继承）

1.job bean - MyJobExtend.java代码如下：

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package top.auok.quartz;
import javax.annotation.Resource;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;
import top.auok.quartz.bean.SayService;
public class MyJobExtend extends QuartzJobBean {
@Resource
private SayService sayService;
@Override
protected void executeInternal(JobExecutionContext arg0) throws JobExecutionException {
sayService.sayHello();
}
}

2.jobFactory - 重写 -MyQuartzJobFactory.java

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package top.auok.quartz;
import org.quartz.spi.TriggerFiredBundle;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.scheduling.quartz.SpringBeanJobFactory;
import org.springframework.stereotype.Component;
@Component("myQuartzJobFactory")
public class MyQuartzJobFactory extends SpringBeanJobFactory {
@Autowired
private AutowireCapableBeanFactory beanFactory;
/**
*
* 这里覆盖了super的createJobInstance方法，对其创建出来的类再进行autowire。
*
*/
@Override
protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
Object jobInstance = super.createJobInstance(bundle);
beanFactory.autowireBean(jobInstance);
return jobInstance;
}
}

3.配置 - applicationContext-quartz-extend.xml：

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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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
<bean id="extendJobDetail"
class="org.springframework.scheduling.quartz.JobDetailFactoryBean">
<property name="jobClass" value="top.auok.quartz.MyJobExtend" />
<property name="durability" value="true" />
</bean>
<bean id="extendTrigger"
class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="extendJobDetail"></property>
<property name="cronExpression" value="0/2 * * * * ?"></property>
</bean>
<bean id="SpringJobSchedulerFactoryBean"
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="extendTrigger" />
</list>
</property>
<property name="jobFactory" ref="myQuartzJobFactory"></property>
</bean>
</beans>

调试运行：

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package top.auok.quartz;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App {
public static void main(String[] args) {
// init spring ioc container
new ClassPathXmlApplicationContext("applicationContext.xml", "applicationContext-quartz-extend.xml"); //按需更改配置文件alone/extend
}
}

the end

附：pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>top.auok</groupId>
<artifactId>quartz</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>quartz</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>4.0.2.RELEASE</spring.version>
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
<quartz.version>2.2.2</quartz.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>${quartz.version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf8</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>

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