failed to lazily initialize a collection of role:
转自:http://blog.163.com/nikyok/blog/static/5550845320076261143867/
环境 spring+hibernate3+struts
今天又碰到错误
failed to lazily initialize a collection ofrole: no session or session was closed
试验了一下发现了几个解决方法:
1、是把对应一对多的那两个列lazy=true改为lazy=false即可
2、对于查询中如果用的是xxx.load(class,id)则改为xxx,get(class,id)
3在web.xml文件中加入
<filter>
<filter-name>hibernateFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>singleSession</param-name>
<param-value>false</param-value>
</init-param>
<!--这个-- <init-param>一定要加不然很可能会报错:org.springframework.dao.InvalidDataAccessApiUsageException:Write operations are not allowed in read-only mode(FlushMode.NEVER) - turn your Session into FlushMode.AUTO or remove'readOnly' marker from transaction definition
>
</filter>
<filter-mapping>
<filter-name>hibernateFilter</filter-name>
<url-pattern>*.mmg</url-pattern>
</filter-mapping>
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