春季 jpa 实体字段列表<String>到发布数组归档不起作用

Question

我有一个这样的实体:

@Entity
@Data
public class Cat {
@Id
private String catId;
private String catName;
private List<String> favFoods;
}

当我启动我的Spring引导时，它显示这个错误:

Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: java.util.List

在启动应用程序之前，我在DB中删除表Cat我的yml设置是:

spring:
datasource:
url: jdbc:postgresql://localhost:5432/localtest
username: catuser
password:
jpa:
show-sql: false
hibernate:
ddl-auto: create
properties:
hibernate:
dialect: org.hibernate.dialect.PostgreSQLDialect
format_sql: true

如果我注释掉List的字段，一切都可以正常工作。我需要添加什么注释来解决这个问题吗?

谢谢

Answer 1

您还可以使用以下代码片段

@ElementCollection
@CollectionTable(name = "my_list", joinColumns = @JoinColumn(name = 
"id"))
@Column(name = "list")
List<String> favFoods;

看到

Answer 2

你必须告诉Hibernate如何映射列表，用@TypeDef(name = "list-array",typeClass = ListArrayType.class)注释你的类，用@Type(type = "list-array")注释列表，即:

@Entity
@Data
@TypeDef(
name = "list-array",
typeClass = ListArrayType.class
)
public class Cat {
@Id
private String catId;
private String catName;
@Type(type = "list-array")
private List<String> favFoods;
}