异常积累：org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in

1. 此异常是由于Spring提供的Open Session In View而引起的。
   
2. 开启OpenSessionInViewFilter这个过滤器的时候FlushMode就已经被默认设置为了MANUAL，如果FlushMode是MANUAL或NEVEL,在操作过程中 hibernate会将事务设置为readonly，所以在增加、删除或修改操作过程中会出现该错误
3.                     <filter> 
4.        <filter-name>hibernateFilter</filter-name> 
5.        <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> 
6.           <init-param> 
7.                <param-name>flushMode</param-name> 
8.                <param-value>AUTO</param-value> 
9.            </init-param>
10.       <!-- singleSession默认为true,若设为false则等于没用OpenSessionInView -->   视情况而定
11.        <init-param> 
12.            <param-name>singleSession</param-name> 
13.            <param-value>true</param-value> 
14.        </init-param> 
15.    </filter> 
17.    <filter-mapping> 
18.        <filter-name>hibernateFilter</filter-name> 
19.        <url-pattern>/*</url-pattern> 
20.    </filter-mapping>

 结束！

 

以上内容来自网络：http://www.blogjava.net/GavinMiao/archive/2011/10/21/361709.html