异常：上下文初始化期间遇到异常 - 取消刷新尝试：org.springframework.beans.factory.BeanCreationException：答案

【问题标题】：Exception: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException:异常：上下文初始化期间遇到异常 - 取消刷新尝试：org.springframework.beans.factory.BeanCreationException：
【发布时间】：2020-05-03 15:01:06
【问题描述】：

我正在尝试建立一对多关系（表 EmployeeEntity 和 AddressEntity），但是当我构建时出现错误。

AddressEntity 类

@Data
@EqualsAndHashCode(exclude = "eeEntity")

public class AddressEntity {
..

@OneToMany(mappedBy = "addressEntity", targetEntity = com.howtodoinjava.demo.model.AddressEntity.class,cascade = CascadeType.ALL)

private Set<EmployeeEntity> eeEntity;

public AddressEntity(String city, EmployeeEntity... eeEntity) {
    this.city = city;
    this.eeEntity = Stream.of(eeEntity).collect(Collectors.toSet());
    this.eeEntity.forEach(x -> x.setAddressEntity(this));
}
---------

EmployeeEntity 类

@Data
@Entity
public class EmployeeEntity {
...
    @ManyToOne(targetEntity = com.howtodoinjava.demo.model.AddressEntity.class)
private AddressEntity addressEntity;

public AddressEntity getAddressEntity() {
    return addressEntity;
}

public void setAddressEntity(AddressEntity addressEntity) {
    this.addressEntity = addressEntity;

错误： 2020-01-17 00:01:24.401 WARN 4890 --- [main] ConfigServletWebServerApplicationContext：上下文初始化期间遇到异常-取消刷新尝试：org.springframework.beans.factory.BeanCreationException：创建名称为“entityManagerFactory”的bean时定义在类路径资源[org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]：init方法调用失败；嵌套异常是 org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: com.howtodoinjava.demo.model.AddressEntity.eeEntity 中的 com.howtodoinjava.demo.model.AddressEntity.addressEntity

org.springframework.beans.factory.BeanCreationException：在类路径资源 [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class] 中定义名称为“entityManagerFactory”的 bean 创建错误：调用 init 方法失败；嵌套异常是 org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: com.howtodoinjava.demo.model.AddressEntity.eeEntity 中的 com.howtodoinjava.demo.model.AddressEntity.addressEntity

有人能帮我理解为什么会这样吗？

【问题讨论】：

您在 AddressEntity 类上缺少@Entity 注释
我也试过了，但没有运气。

标签： hibernate spring-data-jpa one-to-many

【解决方案1】：

试试下面的代码sn-p，

在 AddressEntity 类中，

@OneToMany(mappedBy = "addressEntity", targetEntity = com.howtodoinjava.demo.model.AddressEntity.class,cascade = CascadeType.ALL)
private Set<EmployeeEntity> eeEntity;

在 EmployeeEntity 类中，

@ManyToOne
@JoinColumn(name="ADDRESS_ID", nullable=false)
private AddressEntity addressEntity;

其中 ADDRESS_ID 可以是 AddressEntity 的主键。

【讨论】：