Could not determine recommended JdbcType for `java.util.Map<java.lang.String, java.lang.String>

Error:

org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'entityManagerFactory' defined in class path 
resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: 
Could not determine recommended JdbcType for `java.util.Map<java.lang.String, java.lang.String>`

The mentioned error will occur when attempting to create a model using the following code:

@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Student {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String firstName;
    private String lastName;
    private Map<String,String> stdentDetails;
    private String city;
    private Date joinDate;
}

The error message here is related to Spring and Hibernate when trying to create an entityManagerFactory. The issue seems to be with determining the recommended JdbcType for a java.util.Map<java.lang.String, java.lang.String> i.e studentDetails variable.

Solution:

To resolve this issue, include the annotation @JdbcTypeCode(SqlTypes.JSON) on the ‘studentDetails’ variable as shown below:

@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Student {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String firstName;
    private String lastName;
    @JdbcTypeCode(SqlTypes.JSON)
    private Map<String,String> stdentDetails;
    private String city;
    private Date joinDate;
}