Write operations are not allowed in read-only mode (FlushMode.MANUAL): 解决方法

Messages: Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition. 
 
File: org/springframework/orm/hibernate3/HibernateTemplate.java 
Line number: 1,175 

解决方法：

<!-- OpenSessionInViewFilter过滤器 -->
	<filter>
		<filter-name>openSessionInViewFilter</filter-name>
		<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
		<!-- 解决read-only mode (FlushMode.NEVER/MANUAL) -->
		<init-param>
			<param-name>sessionFactoryBeanName</param-name>
			<param-value>sessionFactory</param-value>
		</init-param>
		<init-param>
			<param-name>singleSession</param-name>
			<param-value>true</param-value>
		</init-param>
		<init-param>
			<param-name>flushMode</param-name>
			<param-value>AUTO </param-value>
		</init-param>

	</filter>
	<filter-mapping>
		<filter-name>openSessionInViewFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

下面的内容参考：http://blog.csdn.net/tfy1332/article/details/8679711

org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.

问题：只读模式下(FlushMode.NEVER/MANUAL)写操作不被允许：把你的Session改成FlushMode.COMMIT/AUTO或者清除事务定义中的readOnly标记。

错误原因:
          OpenSessionInViewFilter在getSession的时候,会把获取回来的session的flush mode 设为FlushMode.NEVER。然后把该sessionFactory绑定到TransactionSynchronizationManager，使request的整个过程都使用同一个session，在请求过后再接除该sessionFactory的绑定，最后closeSessionIfNecessary根据该session是否已和transaction绑定来决定是否关闭session。在这个过程中，若HibernateTemplate 发现自当前session有不是readOnly的transaction，就会获取到FlushMode.AUTO Session，使方法拥有写权限。也即是，如果有不是readOnly的transaction就可以由Flush.NEVER转为Flush.AUTO,拥有insert,update,delete操作权限，如果没有transaction，并且没有另外人为地设flush model的话，则doFilter的整个过程都是Flush.NEVER。所以受transaction(声明式的事务)保护的方法有写权限，没受保护的则没有。

解决方法:

web.xml配置里添加
<filter>
   <filter-name>OpenSessionInViewFilter</filter-name>
   <filter-class>
    org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
   </filter-class>
   <init-param>
    <param-name>sessionFactoryBeanName</param-name>
    <param-value>sessionFactory</param-value>
   </init-param>
   <init-param>
            <param-name>singleSession</param-name>
            <param-value>true</param-value>           
        </init-param>
        <init-param>
        <param-name> flushMode </param-name>
   <param-value>AUTO </param-value>        
        </init-param>
</filter>
  //   。。。。

<filter-mapping>
   <filter-name>OpenSessionInViewFilter</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>

如果在交给spring 管理的情况下，在beans.xml 里的配置

 <bean id="txManager"
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory" />
 </bean>

 <aop:config>
  <aop:pointcut id="bussinessService"
   expression="execution(* com.fan.service.base.*.*(..))" />
  <aop:advisor pointcut-ref="bussinessService"
   advice-ref="txAdvice" />
 </aop:config>

 <tx:advice id="txAdvice" transaction-manager="txManager">
  <tx:attributes>
   <tx:method name="get*" read-only="false" propagation="NOT_SUPPORTED"/>
   <tx:method name="find*" read-only="false" propagation="NOT_SUPPORTED"/>
   <tx:method name="save*" propagation="REQUIRED"/> // 如果不把save update delete都配置上，
   <tx:method name="update*" propagation="REQUIRED"/> //这些操作会无效
   <tx:method name="delete*" propagation="REQUIRED"/>
  </tx:attributes>
 </tx:advice>