org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.jav
错误原因： 原因是在hibernate映射关系中由于延迟加载，session在调用前已经被关闭，所以加载set属性时无可用session 解决方案1(使用的是注解配置)： 在 @ManyToOne端设置fetch=FetchType.LAZY,@OneToMany端设置fetch=FetchType.EAGER，如下配置 @ManyToOne(cascade={CascadeType.REFRES
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