Spring容器中为业务逻辑组件增加事务控制

今天在开发个人博客时，用到了aop思想，主要体现在事务管理上．但由于编程经验不是很足，搞了整整一个下午才装注册和登陆系统粗粗的做好．时间主要浪费在了调试上．

下面把我今天错误的地方跟在家说一说，相信可能对你有所帮助．

下面把我的applicationContext.xml文件先放出来．

 

<?xml version="1.0" encoding="GB18030"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
	
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="configLocation"
			value="classpath:hibernate.cfg.xml">
		</property>
	</bean>
	
	<bean id="userDao" class="loginreg.dao.UserDaoHibernater">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>

	<bean id="mgr" class="loginreg.bussiness.UserManagerImpl">
		<property name="userDao" ref="userDao"></property>
	</bean>

	<!-- 配置使用hibernate局部事务策略 -->
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>

	<!-- 定义事务拦截器 -->
    <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">
        <property name="transactionManager" ref="transactionManager"/>
    	<property name="transactionAttributes">
		    <props>
			    <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
		    	<prop key="*">PROPAGATION_REQUIRED</prop>
		    </props>
	    </property>
	</bean>
	
	<!-- 定义BeanNameAutoProxyCreator-->
	<bean
		class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
		<property name="beanNames">
			<list>
				<value>mgr</value>
			</list>
		</property>
		<!--  下面定义BeanNameAutoProxyCreator所需的事务拦截器-->
		<property name="interceptorNames">
			<list>
				<value>transactionInterceptor</value>
			</list>
		</property>
	</bean>

</beans>

以上配置是正确的，但是在我发现错误之前，始终会出现这样的错误：

 

写道

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionInterceptor' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'transactionAttributes' threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.util.StringUtils.containsWhitespace(Ljava/lang/String;)Z
Caused by: org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessException details (1) are:
PropertyAccessException 1:
org.springframework.beans.MethodInvocationException: Property 'transactionAttributes' threw exception; nested exception is java.lang.NoSuchMethodError: org.springframework.util.StringUtils.containsWhitespace(Ljava/lang/String;)Z
Caused by: java.lang.NoSuchMethodError: org.springframework.util.StringUtils.containsWhitespace(Ljava/lang/String;)Z

稍微看一下，就会发现是说少了一个方法．我随着这个方法进入spring.jar源文件，找到这个方法，的确没发现有关的方法．我查了很多文档，配置没有任何错误．当时一直没有想到spring．jar版本过低，因为我用的是最新版的myeclipse，后来在网业上偶尔看了几行字，受到了启发，我下了最新版的spring.jar.2.5版本的，结果调试成功．