实体一对多和多对一注解配置注意问题

many方的配置

@ManyToOne(cascade = CascadeType.REFRESH, optional = true)
@JoinColumn(name = "数据库字段", unique = false)

one方的配置

@OneToMany(mappedBy = "对象属性", cascade = CascadeType.REFRESH, fetch = FetchType.LAZY)

错误问题：Caused by: org.hibernate.MappingException: Could not determine type for: java.util.List

解决：实体中的注解全部写在字段，或全部写在getXxx()方法上。