SpringBoot 将 Java 实体映射到数据库中的 Json 列

Question

Need help in mapping entity attribute of Spring to json column in Postgres DB using JPA hibernate. We have a column in db whose type is JSON but cant find its corresponding mapping in spring.

Tried with this-

 @Column(name = "tags", columnDefinition = "jsonb")
 @JsonProperty("tags")
 private Map<String,Object> tags = new HashMap<>();

But with this, we getting error while creating db table Any suggestions regarding this? Thanks. Any help is appreciated.

Answer 1

There is no out of box support for this. But you can use vladmihalcea library.

Gradle Dependency:

implementation 'com.vladmihalcea:hibernate-types-52:2.16.2'

Your Entity:

import com.vladmihalcea.hibernate.type.json.JsonType;
import org.hibernate.annotations.Type;
import org.hibernate.annotations.TypeDef;
import org.hibernate.annotations.TypeDefs;

import javax.persistence.Column;
import javax.persistence.Entity;

@Entity
@TypeDefs({
    @TypeDef(name = "json", typeClass = JsonType.class)
})
class YourPojo {
    
    @Type(type = "json")
    @Column(name = "tags", columnDefinition = "json")
    private Map<String,Object> tags = new HashMap<>();
}