failed to lazily initialize a collection of role: com.ares.pojo.Member.prepaidlogsForOperateid, no session or session was closed 异常
在一个项目当中,以注解开发.当用户从login页面登录后跳转到main页面当中(Main页面把其它页面组织在一起),而在Main当中要验证用户是否登录过,也就是验证存在Session里的用户信息是不是还在.
当然在Action里写了一个验证方法,可是一执行此方法时出错下面的错,如下图:
网上搜了一下http://blog.sina.com.cn/s/blog_60f6320501011sm6.html大家可学习一下.
我也总结一下,避免自己下次再出错:
大家可以看到我上面的图当中:com.ares.pojo.Member这是我包面下面的实体,当我用注解时我是使用工具自动给我生成的实体,当然生成后的实体一对多的注解:
上图当中红色部份就是Hibernate的LAZY 也就是Hibernatelazy用来控制延迟加载和立即加载的.
多的不错了,我百度了一下还有这个LAZY的面试题,如地址:http://zhidao.baidu.com/question/89445445.html
好吧我的处理就是如下图:
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