failed to lazily initialize a collection of role:
2007-08-12 09:57
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| 环境 spring＋hibernate3＋struts 今天又碰到错误 failed to lazily initialize a collection of role: 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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