yr_fly的博客

hibernate+jpa报illegal Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: 错误 要把LinkedList<Card> list=new LinkedList<Card>(); LinkedList替换为List即可。List<Card>

警惕自己这个知识点： `package com.jee.extendTest;import javax.persistence.*; @Entity @Table(name=”animal”) @Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)//设置了这个后，主键就不能采用默认设置 public class Animal {