如何使用 Spring Boot 将类对象的列表存储到 MySql 中

Question

I want to store a List of class : RestApiResponse into MySql. But getting below error:

org.hibernate.HibernateException: Could not determine a type for class: com.try.sreapi.beans.RestApiResponse

Below are my classes:

Entity class : SREAPITestingHistory.java

    @NamedQueries(@NamedQuery(name="getSREAPITestHistory.findAll", query="SELECT a FROM SREAPITestingHistory a"))

@SqlResultSetMapping(name="sreapitestinghistoryres",
entities=@EntityResult(entityClass=SREAPITestingHistory.class))

@Entity
@Table(name="sreapi_testing_history_details")
@Transactional
public class SREAPITestingHistory implements Serializable{
    
    private static final long serialVersionUID = -7221709766109001257L;
    
    @Id
    @Column(name="request_time")
    private String request_time;
    
    @Column(name="req_id")
    private String req_id;
    
    @Column(name="app_name")
    private String app_name; 
    
    @Column(name="request_name")
    private String request_name;
    
    @Lob
    @Column(name="response_body")
    private List<RestApiResponse> response;

    public String getRequest_time() {
        return request_time;
    }

    public void setRequest_time(String request_time) {
        this.request_time = request_time;
    }

    public String getReq_id() {
        return req_id;
    }

    public void setReq_id(String req_id) {
        this.req_id = req_id;
    }

    public String getApp_name() {
        return app_name;
    }

    public void setApp_name(String app_name) {
        this.app_name = app_name;
    }


    public String getRequest_name() {
        return request_name;
    }

    public void setRequest_name(String request_name) {
        this.request_name = request_name;
    }

    public List<RestApiResponse> getResponse() {
        return response;
    }

    public void setResponse(List<RestApiResponse> response) {
        this.response = response;
    }

    
}

Repository Class: SREAPITestingRepository.java

@Repository
public interface SREAPITestingRepository extends CrudRepository< SREAPITestingHistory, String> {
    
    @Modifying
    @Transactional
    @Query(value="INSERT into sreapi_testing_history_details (request_time,req_id,app_name,request_name,response_body)"+ "VALUES (:request_time,:req_id,:app_name,:request_name,:response_body)", nativeQuery = true)
    public void setApiTestHistoryDetails(@Param("request_time") String request_time,@Param("req_id") String req_id,@Param("app_name") String app_name,@Param("request_name") String request_name,@Param("response_body") List<RestApiResponse> response_body);

}

When I am trying to add values for response_body which is actually a List of RestApiResponse class and I am getting Could not determine a type for class: com.try.sreapi.beans.RestApiResponse exception

Answer 1

From Official doc

A Lob may be either a binary or character type.

The Lob type is inferred from the type of the persistent field or property, and except for string and character-based types defaults to Blob.

Example 1:

@Lob @Basic(fetch=LAZY) @Column(name="REPORT")
String report;

Example 2:

@Lob @Basic(fetch=LAZY) @Column(name="EMP_PIC", columnDefinition="BLOB NOT NULL") protected byte[] pic;

So you can convert your list of data into json string or bytes to store.