關於Spring3.2+Hibernate4.1整合問題：No Session found for current thread

在做最新版本的SSH整合時，遇到當前線程無session的問題，錯誤如下：

java.lang.RuntimeException: No Session found for current thread
	org.gifer.anno.service.impl.SmsInfoServiceImpl.listAll(SmsInfoServiceImpl.java:25)
	org.gifer.anno.action.NewsAction.list(NewsAction.java:51)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:597)
	com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
	com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
	org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
	org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
	com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
	com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
	org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
	org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:546)
	org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
	org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

解決辦法：

<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
	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">

	<context:component-scan base-package="org.gifer.anno"></context:component-scan>

	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location">
			<value>classpath:c3p0.properties</value>
		</property>
	</bean>

	<!-- DataSource -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass">
			<value>${oracle.driverClass}</value>
		</property>
		<property name="jdbcUrl">
			<value>${oracle.jdbcUrl}</value>
		</property>
		<property name="user">
			<value>${oracle.user}</value>
		</property>
		<property name="password">
			<value>${oracle.password}</value>
		</property>
		<property name="minPoolSize">
			<value>${c3p0.minPoolSize}</value>
		</property>
		<property name="maxPoolSize">
			<value>${c3p0.maxPoolSize}</value>
		</property>
		<property name="initialPoolSize">
			<value>${c3p0.initialPoolSize}</value>
		</property>
		<property name="maxIdleTime">
			<value>${c3p0.maxIdleTime}</value>
		</property>
		<property name="maxStatements">
			<value>${c3p0.maxStatements}</value>
		</property>
		<property name="acquireIncrement">
			<value>${c3p0.acquireIncrement}</value>
		</property>
		<property name="acquireRetryAttempts">
			<value>${c3p0.acquireRetryAttempts}</value>
		</property>
		<property name="acquireRetryDelay">
			<value>${c3p0.acquireRetryDelay}</value>
		</property>
		<property name="testConnectionOnCheckin">
			<value>${c3p0.testConnectionOnCheckin}</value>
		</property>
		<property name="automaticTestTable">
			<value>${c3p0.automaticTestTable}</value>
		</property>
		<property name="idleConnectionTestPeriod">
			<value>${c3p0.idleConnectionTestPeriod}</value>
		</property>
		<property name="checkoutTimeout">
			<value>${c3p0.checkoutTimeout}</value>
		</property>
	</bean>

	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">${hibernate.oracle.dialect}</prop>
				<!-- 是否在日誌中輸出所有Hibernate與數據庫交互的SQL語句 -->
				<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
				<!-- 是否在日誌中輸出的SQL 語句格式化成易讀形式 -->
				<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
				<prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
				<!-- Fetch Size 是設定JDBC的Statement讀取數據的時候每次從數據庫中取出的記錄條數，一般設置爲30、50、100。 
					Oracle數據庫的JDBC驅動默認的Fetch Size=15，設置Fetch Size設置爲：30、50，性能會有明顯提升，如果繼續增大， 超出100，性能提升不明顯，反而會消耗內存。 -->
				<prop key="hibernate.jdbc.fatch_size">${hibernate.jdbc.fatch_size}</prop>
				<prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>

				<!-- Hibernate4 這裏和Hibernate3不一樣 要特別注意！！！ -->
				<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory
				</prop>
				<!-- Hibernate3 -->
				<!-- <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop> -->

				<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext
				</prop>

			</props>
		</property>
		<property name="mappingResources">
			<list>
				<value>org/gifer/anno/model/UbtSmsInfo.hbm.xml</value>
			</list>
		</property>
	</bean>

	<bean id="transactionManager"
		class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>
	<tx:annotation-driven/>
</beans>

注意添加：

<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>

開啓事務驅動：<tx:annotation-driven/>

Service層：@Transactional