转:org.springframework.dao.Inval…

1. 转载:文章来源：http://lucky16.iteye.com/blog/673903
   
   此异常是由于Spring提供的OpenSession In View而引起的。
   
   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 
   <</span>filter>  
2.        <</span>filter-name>hibernateFilter</</span>filter-name>  
3.        <</span>filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</</span>filter-class>  
4.           <</span>init-param>  
5.                <</span>param-name>flushMode</</span>param-name>  
6.                <</span>param-value>AUTO</</span>param-value>  
7.            </</span>init-param> 
8.        <</span>init-param>  
9.            <</span>param-name>singleSession</</span>param-name>  
10.            <</span>param-value>true</</span>param-value>  
11.        </</span>init-param>  
12.    </</span>filter>  
13.    <</span>filter-mapping>  
14.        <</span>filter-name>hibernateFilter</</span>filter-name>  
15.        <</span>url-pattern>/*</</span>url-pattern>  
16.    </</span>filter-mapping>