baidu_28283827的博客

1. 事物管理器Spring并不直接管理事务，而是提供了多种事务管理器，他们将事务管理的职责委托给Hibernate或者JTA等持久化机制所提供的相关平台框架的事务来实现。Spring事务管理器的接口是org.springframework.transaction.PlatformTransactionManager，通过这个接口，Spring为各个平台如JDBC、Hibernate等

Caused by: javax.el.ELException: org.hibernate.LazyInitializationException: could not initialize proxy - no Session    at javax.el.BeanELResolver.getValue(BeanELResolver.java:310)    at javax.el

14:13:34,873 [main] ERROR [org.hibernate.hql.internal.ast.ErrorCounter.reportError(ErrorCounter.java:78)] - line 1:6: unexpected token: Member14:13:34,875 [main] ERROR [org.hibernate.hql.internal.as

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'memberController': Unsatisfied dependency expressed through field 'memberService': Error creating bean

org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' mar

1. 一对多关系：在一的一方添加注解@OneToMany(targetEntity=Goods.class,cascade=CascadeType.ALL)，指定cascade为all,即交由多的一方控制；在多的一方添加注解@ManyToOne(targetEntity=GoodsClass.class,fetch=FetchType.LAZY) @JoinColumn(name="goo