在java timer定时器中调用dao层会报错"No Session found for current thread"

[yanxin9210]

现在在做一个web项目，使用spring+springMVC+hibernate框架，

问题描述：
项目中有一个扫描的功能，分即时任务、定时任务、周期任务三种，即时任务已经实现了，现在使用java.util.Timer、java.util.TimerTask类做定时任务，重写TimerTask的run方法，在run方法中调用之前已经没有问题的即时任务扫描方法。每次运行定时任务时，会卡在dao层方法的调用上，因为在即时任务的扫描方法中调用了dao层的数据操作方法，报错“No Session found for current thread”。

即时任务的执行流程：前台提交扫描请求->控制器调用service层的立即扫描方法；
定时任务的执行流程：前台提交扫描请求->控制器调用service层的定时扫描方法->调用立即扫描方法。

下面附上代码和配置文件，请各位大牛帮忙解决啊！


service层代码

 /**
	 * 开始定时扫描任务
	 * @param blTask
	 */
public void startTimerTask(final BLTask blTask) {
		Date startDate = blTask.getStartTime();
		TimerTask task = new TimerTask() {
			
			@Override
			public void run() {
			// 调用扫描方法
				startImmediateTask(blTask);
			}
		};
		Timer timer = new Timer();
		timer.schedule(task, startDate);		
	}


/**
	 * 开始即时扫描任务
	 * @param blTask
	 */
 public void startImmediateTask(BLTask blTask) {
		
		BLScanParam blScanParam = new BLScanParam();
		BLPolicyGroup blPolicyGroup = null; // 策略组
		List<BLCheckItem> blCheckItems = null; // 检查项
		Map<Long, BLCheckScript> blCheckScriptMap = new HashMap<Long, BLCheckScript>(); // 检查脚本
		
		Long pgId = null; // 策略组ID
		String alias = null; // 策略别名、检查项别名
		Long osType = blTask.getOsType(); // 操作系统类型
		List<Long> csIds = new ArrayList<Long>(); // 检查脚本ID数组
		
		blScanParam.setBlTask(blTask);
		
		pgId = blTask.getPgId();
		// 通过策略组ID查找策略组
		blPolicyGroup = blPolicyGroupDao.get(pgId);
		
		if (blPolicyGroup == null) {
			return;
		}
		blScanParam.setBlPolicyGroup(blPolicyGroup);
		alias = blPolicyGroup.getAlias();
		
		// 通过别名、操作系统类别查找所有匹配的检查项
		blCheckItems = blCheckItemDao.queryByProerties(new String[]{"alias", "osType"}, new Object[]{alias, osType});
		
		if (blCheckItems == null || blCheckItems.size() <= 0) {
			return;
		}
		blScanParam.setBlCheckItems(blCheckItems);
		
		for (BLCheckItem blCheckItem : blCheckItems) {
			csIds.add(blCheckItem.getCsId());
		}
		int size = csIds.size();
		
		// 获取当前策略组下的所有检查项的检测脚本
		List<BLCheckScript> blCheckScripts = blCheckScriptDao.queryByProerties("csId", (Long[])csIds.toArray(new Long[size]));

		for (BLCheckScript blCheckScript : blCheckScripts) {
			// 获取当前策略组下的所有检测脚本，并放入map中
			blCheckScriptMap.put(blCheckScript.getCsId(), blCheckScript);
		}
		
		blScanParam.setBlCheckScriptMap(blCheckScriptMap);
		
		// 分割ip为数组，传入TaskDispatch
		String[] ips = getIps(blTask.getIpArea());
		TaskDispatch taskDispatch = new TaskDispatch(ips, blScanParam);
		taskDispatch.StartTask();
		
		// 将当前TaskDispatch对象的引用放入taskDispatchMap中，供停止任务时使用
		taskDispatchMap.put(blTask.getTkId(), taskDispatch);
	}

applicationContext.xml

 <?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:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:task="http://www.springframework.org/schema/task"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
				http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
				http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd">

	<context:annotation-config />
	<context:component-scan base-package="com.djbh" />
	
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		
		<property name="driverClass" value="com.mysql.jdbc.Driver" />
		<property name="jdbcUrl" value="jdbc:mysql://192.168.1.247:3306/djbh_db?useUnicode=true&characterEncoding=utf-8" />
		<property name="user" value="root" />
		<property name="password" value="mysql" />
		
		 
		<!--
		<property name="driverClass" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
		<property name="jdbcUrl" value="jdbc:sqlserver://localhost:1433;DatabaseName=DJBH_DB" />
		<property name="user" value="sa" />
		<property name="password" value="123456" />
		-->
		<property name="acquireIncrement" value="3" />
		<property name="idleConnectionTestPeriod" value="120" />
		<property name="initialPoolSize" value="3" />
		<property name="minPoolSize" value="3" />
		<property name="maxPoolSize" value="15" />
		<property name="numHelperThreads" value="3" />
		<property name="preferredTestQuery" value="select 1" />
	</bean>
		
	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
				<!-- <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop> -->
				<!-- <prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop> -->
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.use_outer_join">true</prop>
				<prop key="hibernate.jdbc.fetch_size">30</prop>
				<prop key="hibernate.jdbc.batch_size">30</prop>
				<prop key="hibernate.jdbc.batch_versioned_data">true</prop>
				<prop key="hibernate.cache.use_second_level_cache">true</prop>
				<prop key="hibernate.cache.use_query_cache">true</prop>
				<prop key="hibernate.cache.provider_class">net.sf.ehcache.hibernate.EhCacheProvider</prop>
				<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
				<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
				<prop key="hibernate.hbm2ddl.auto">update</prop>
				<prop key="javax.persistence.validation.mode">none</prop>
			</props>
		</property>
		<property name="dataSource" ref="dataSource" />
		<property name="packagesToScan">
			<list>
				<value>com.djbh.model</value>
			</list>
		</property>
	</bean>

	<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>
	

	<tx:annotation-driven transaction-manager="transactionManager" />
	
	<!-- 启动对@AspectJ注解的支持 -->
	<aop:aspectj-autoproxy/>

</beans>

springmvc-servlet.xml

 <?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd 
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">


	<mvc:annotation-driven/>
	
	<mvc:resources location="/static/" mapping="/static/**"/>
	<mvc:resources location="/attachment/report_html/" mapping="/attachment/report_html/**"/> 
	
	<context:component-scan base-package="com.djbh.controller" />
	
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
	
	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
		<property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property> 
		<property name="prefix"><value>/WEB-INF/page/</value></property> 
		<property name="suffix"><value>.jsp</value></property>
	</bean>
	
	<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
		<property name="basename" value="messages" />
		<property name="useCodeAsDefaultMessage" value="true" />
	</bean>
	
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<!--<property name="maxUploadSize" value="10485760"></property> -->
	</bean> 
	
	<aop:aspectj-autoproxy proxy-target-class="true" />
</beans>