Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL)

今天遇到一个这个异常：

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.花了我半天时间，网上很多都试了，什么在spring配置文件配置，在代码里面控制，结果都没有解决 ，最后修改web.xml文件解决了。

两种解决方式：

1.去掉web.xml中配置的

<filter>
  <filter-name>hibernateFilter</filter-name>
  <filter-class>
   org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
  </filter-class>
 </filter>

2、也可以修改为：

<filter>   
  <filter-name>lazyLoadingFilter</filter-name>   
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>   
  <init-param>
<param-name>singleSession</param-name>
<param-value>true</param-value>
<param-name> flushMode </param-name>  
  <param-value>AUTO </param-value>  
  </init-param>
  </filter>