spring整合activiti工作流

applicationContext.xml添加：
    <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">  
        <property name="dataSource" ref="dataSource"/>
        <property name="transactionManager" ref="transactionManager" /> 
        <property name="databaseSchemaUpdate" value="true" />
    </bean>
    <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">  
        <property name="processEngineConfiguration" ref="processEngineConfiguration" />  
    </bean>
    <bean id="repositoryService" factory-bean="processEngine"
        factory-method="getRepositoryService" />
    <bean id="runtimeService" factory-bean="processEngine"
        factory-method="getRuntimeService" />
    <bean id="taskService" factory-bean="processEngine"
        factory-method="getTaskService" />
    <bean id="historyService" factory-bean="processEngine"
        factory-method="getHistoryService" />
    <bean id="managementService" factory-bean="processEngine"
        factory-method="getManagementService" />