Java spring bean 配置错误

Java spring bean configuration error

提问by l0r3nz4cc10

in my web application developped with GWT, Hibernate ans Spring, I encounter when setting the jobClass bean in the application-context.xml file.

在我用 GWT、Hibernate ans Spring 开发的 web 应用程序中，我在 application-context.xml 文件中设置 jobClass bean 时遇到。

I get this error at runtime :

我在运行时收到此错误：

Error 500 Error creating bean with name 'schedulerFactory' defined in class path resource [application-context.xml]:
Cannot resolve reference to bean 'cronTrigger' while setting bean property 'triggers' with key [0];

nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'cronTrigger' defined in class path resource [application-context.xml]:
Cannot resolve reference to bean 'exampleJob1' while setting bean property 'jobDetail';

nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'exampleJob1' defined in class path resource [application-context.xml]:
Initialization of bean failed;

nested exception is org.springframework.beans.TypeMismatchException:
Failed to convert property value of type [fr.web.utils.ExampleJob] to required type [java.lang.Class] for property 'jobClass';

nested exception is java.lang.IllegalArgumentException:
Cannot convert value of type [fr.web.utils.ExampleJob] to required type [java.lang.Class] for property 'jobClass':
PropertyEditor [org.springframework.beans.propertyeditors.ClassEditor] returned inappropriate value

Here is my Java class :

这是我的 Java 类：

public class ExampleJob extends QuartzJobBean {
    private AbsenceDao absenceDao; 
    @Override
    protected void executeInternal(JobExecutionContext context)
    throws JobExecutionException {
        List untreatedDemands = new ArrayList();
        untreatedDemands = absenceDao.getDemandsAskedNotValidated();
    }
    public AbsenceDao getAbsenceDao() {
        return absenceDao;
    }
    public void setAbsenceDao(AbsenceDao absenceDao) {
        this.absenceDao = absenceDao;
    }
}

and here is my application-context.xml :

这是我的 application-context.xml ：

    <!-- variables d'environnement - fichier properties -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" id="placeholderconfig">
        <property name="fileEncoding" value="UTF-8"/>
        <property name="locations">
            <list>
                <value>classpath:internal.properties</value>
            </list>
        </property>
    </bean>

    <!-- Configuration du crontrigger -->
    <bean id="schedulerFactory" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="cronTrigger" />
            </list>
        </property>
    </bean>
    <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
        <property name="jobDetail">
            <ref local="exampleJob1" />
        </property>

        <property name="cronExpression">
            <util:constant static-field="fr.web.utils.APP_VAR.CRON_EXPRESSION" />
        </property>
    </bean>

    <bean id="jobClass" class="fr.web.utils.ExampleJob">
        <property name="absenceDao" ref="absenceDao"/>
    </bean>

    <bean id="exampleJob1" class="org.springframework.scheduling.quartz.JobDetailBean">
        <property name="jobClass" ref="jobClass" />
        <property name="jobDataAsMap">
            <map>
                <entry key="timeout" value="5" />
            </map>
        </property>
    </bean>

    <tx:annotation-driven transaction-manager="hibernateTransactionManager"/>

    <!-- Bean containing all the properties of the application -->
    <bean class="fr.web.utils.ApplicationProperties" id="applicationProperties" lazy-init="true" scope="singleton">
        <constructor-arg index="0" value="classpath:internal.properties"/>
    </bean>

    <!-- Bean DAO -->
    <bean abstract="true" id="abstractDao">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    <bean class="fr.web.dao.AbsenceDao" id="absenceDao" parent="abstractDao"/>

    </bean>
</beans>

采纳答案by Jigar Joshi

property jobClassrequires classand you have given referenceof bean , So change

属性jobClass需要class并且你已经给出reference了 bean ，所以改变

<bean id="exampleJob1" class="org.springframework.scheduling.quartz.JobDetailBean">
    <property name="jobClass" ref="jobClass" />
    <property name="jobDataAsMap">
        <map>
            <entry key="timeout" value="5" />
        </map>
    </property>
</bean>

to (Note: valueattribute below)

到（注意：value下面的属性）

<bean id="exampleJob1" class="org.springframework.scheduling.quartz.JobDetailBean">
    <property name="jobClass" value="fr.acensi.web.utils.ExampleJob" />
    <property name="jobDataAsMap">
        <map>
            <entry key="timeout" value="5" />
        </map>
    </property>
</bean>

回答by user1412523

There is another option here which you may think neater or not, I like it as it keeps the context a bit cleaner.

这里还有另一个选项，您可能认为更简洁，我喜欢它，因为它使上下文更清晰。

<bean id="exampleJob1" class="org.springframework.scheduling.quartz.JobDetailBean">
  <property name="jobClass">
    <bean factory-bean="jobClass" factory-method="getClass" />
  </property>
</bean>

the breakdown of the problem is as Jigar Joshi describes solution is slighty different. It allows you to keep you bean jobClass instantiation seperate from the building of the JobDetailbean.

问题的细分与 Jigar Joshi 描述的解决方案略有不同。它允许您将 bean jobClass 实例化与 JobDetailbean 的构建分开。