Spring中编程式事务处理(使用TransactionTemplate)

Spring的编程式事务处理，需要使用Hibernate事务回调接口，事务回调接口可以管理Hibernate的事务：

TransactionCallbackWithoutResult —— 执行事务没有返回值，例如save、update、delete等等；

TransactionCallback —— 执行事务处理后有返回值，如find要返回结果集(List)；

spring相关配置

<!-- dataSource -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<!-- Connection Info -->
		<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
		<property name="url" value="jdbc:oracle:thin:@192.168.26.188:1521:xxx" />
		<property name="username" value="xx" />
		<property name="password" value="xx" />

		<!-- Connection Pooling Info -->
		<property name="initialSize" value="3" />
		<property name="maxActive" value="5" />
		<property name="maxIdle" value="30" />
		<property name="maxWait" value="1000" />
		<property name="poolPreparedStatements" value="true" />
		<property name="defaultAutoCommit" value="true" />			
	</bean>

	<bean id="dataSourceTransactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<constructor-arg ref="dataSource" />
	</bean>	

	<bean id="transactionTemplate"
		class="org.springframework.transaction.support.TransactionTemplate">
		<constructor-arg ref="dataSourceTransactionManager" />
	</bean>

public void createPerson(final Person person) {
   transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
   transactionTemplate.execute(new TransactionCallbackWithoutResult(){    // 使用无返回值的事务回调接口
    @Override
    protected void doInTransactionWithoutResult(TransactionStatus arg0) {
     getHibernateTemplate().save(person);    
    }   
   });
}

public Person queryOnePerson(final String hql) {
   transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
   return (Person)transactionTemplate.execute(new TransactionCallback(){     // 使用带返回值的事务回调接口

    public Object doInTransaction(TransactionStatus arg0) {
     return getHibernateTemplate().find(hql).get(0);
    }   
   });
}