三天时间小项目完毕,从去年十月中旬到现在开始学习后端技术,Java,Jsp,Servlet,再到后来的Struts2,hibernate,直到最终做出来小项目。理解了MVC分层思想,功能模块化编程,前端部分还没有深入学习。有学习后端技术的小伙伴可加qq 871885998交流~
2017-02-21
ERROR: HHH000099: an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session): java.lang.ClassNotFoundException: entity.students
org.hibernate.cfg.beanvalidation.IntegrationException: Error activating Bean Validation integration
谁帮忙解决下,谢谢!
org.hibernate.cfg.beanvalidation.IntegrationException: Error activating Bean Validation integration
谁帮忙解决下,谢谢!
2017-02-18
创建SchemaExport的对象
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();
MetadataImplementor metadata = (MetadataImplementor) new MetadataSources(serviceRegistry).buildMetadata();
new SchemaExport().create(EnumSet.of(TargetType.DATABASE), metadata);
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();
MetadataImplementor metadata = (MetadataImplementor) new MetadataSources(serviceRegistry).buildMetadata();
new SchemaExport().create(EnumSet.of(TargetType.DATABASE), metadata);
空指针异常的原因是你们忘记在logout这个方法添加注解@skipValidation,如果不添加这个注解,那么你在login_success的页面登出的时候也会进行validate()这个方法,显然这个步骤我们是没有传user实例进去的,所以酒报了空指针的异常
2017-02-17