Question

我在JSP Struts / Hibernate应用程序中的不同java文件中嵌入了quartz scheduler。我的执行方法如下所示：

public void execute(JobExecutionContext jExeCtx) throws JobExecutionException {
       try {
        userDetailManager = new UserDetailManagerImpl();
        userDetailManager.sendMailTxnDetailsEveryNight();
    } catch (ApplicationException ex) {
        java.util.logging.Logger.getLogger(JobClass.class.getName()).log(Level.SEVERE, null, ex);
    }
 }

然后我调用sendMailTxnDetailsEveryNight方法，看起来像：

public void sendMailTxnDetailsEveryNight() throws ApplicationException{
    List<RemittanceTransactionBean> rBean = remittanceTransactionDao.getTodayTxnSummary();
return rBean;
}

我在给定点得到nullpointerException：

java.lang.NullPointerException
at com.mtmrs.business.user.impl.UserDetailManagerImpl.sendMailTxnDetailsEveryNight(UserDetailManagerImpl.java:754)
at com.mtmrs.util.common.JobClass.execute(JobClass.java:44)

我如何调用getTodayTxnSummary（）;所以我没有得到任何错误。我在applicationContext中定义了remittanceTransactionDao：

<bean id="userDetailManager" parent="abstractTxDefinition">
    <property name="target">
        <bean class="com.mtmrs.business.user.impl.UserDetailManagerImpl">
        <property name="remittanceTransactionDao" ref="remittanceTransactionDao"></property>
        </bean>
    </property>
</bean>

我试过调试看看，汇款交易代表是空的。在调用方法remittanceTransactionDao之前我也试过设置如下。这样，在sendMailTxnDetailsEveryNight中使用的会话变量为null。我被困在这里。

remittanceTransactionDao = new RemittanceTransactionDaoHibernate(RemittanceTransaction.class);

Answer 1

我删除了类并在我的应用程序Context Dao.xml中配置了以下内容。

<bean name="runMeJob" class="org.springframework.scheduling.quartz.JobDetailBean">

    <property name="jobClass" value="com.mtmrs.util.common.RunMeJob" />

    <property name="jobDataAsMap">
        <map>
            <entry key="userDetailManager" value-ref="userDetailManager" />
        </map>
    </property>

</bean>
<bean id="cronTrigger"
      class="org.springframework.scheduling.quartz.CronTriggerBean">

    <property name="jobDetail" ref="runMeJob" />
    <property name="cronExpression" value="0 0 10,12,14,16,18,20,22,23 * * ?" />
</bean>

<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    <property name="jobDetails">
        <list>
            <ref bean="runMeJob" />
        </list>
    </property>

    <property name="triggers">
        <list>
            <ref bean="cronTrigger" />
        </list>
    </property>
</bean>

然后我删除了关于石英实现代码的所有内容，无论我想要做什么，并添加了这个类：

package com.mtmrs.util.common;
import com.mtmrs.business.user.UserDetailManager;
import com.mtmrs.util.logger.MTMRSLogger;
import com.mtmrs.util.logger.ApplicationException;
import java.util.logging.Level;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;


public class RunMeJob extends QuartzJobBean {

UserDetailManager userDetailManager;

public UserDetailManager getUserDetailManager() {
    return userDetailManager;
}

public void setUserDetailManager(UserDetailManager userDetailManager) {
    this.userDetailManager = userDetailManager;
}

@Override
protected void executeInternal(JobExecutionContext context)
        throws JobExecutionException {
    System.out.print("Entering Class: Job Class , method: execute");
    try {
        userDetailManager.sendMailTxnDetailsEveryNight();
    } catch (ApplicationException ex) {
        java.util.logging.Logger.getLogger(RunMeJob.class.getName()).log(Level.SEVERE, null, ex);
    }
    System.out.print("Exiting Class: Job Class , method: execute");

}

}

此外，我将石英罐的版本降级为1.x. 我需要在userDetailManager（即sendMailTxnDetailsEveryNight）对象中使用一个方法作为触发器中指定的每2小时运行一次的作业。

基本上我点了这个链接：Mykong 希望这对某人有所帮助。

从执行quartz scheduler调用manager方法时出现NullPointerException

1 个答案: