我想创建mysql字符串数组类型的数据字段，因此我在spring-boot gradle项目中创建了模型类，如下所示。

@Entity
    @Table(name = "single_questions")
    public class SingleQuestions {
        @Id
        private Integer id;
        private String[] fieldtypevalues;
    
        public SingleQuestions() {
        }
    
        public SingleQuestions(Integer id, String category, String field, String field_type, String[] fieldtypevalues) {
            this.id = id;
            this.fieldtypevalues = fieldtypevalues;
        }
    
        public Integer getId() {
            return this.id;
        }
    
        public void setId(Integer id) {
            this.id = id;
        }
    
    
        public String[] getFieldtypevalues() {
            return this.fieldtypevalues;
        }
    
        public void setFieldtypevalues(String[] fieldtypevalues) {
            this.fieldtypevalues = fieldtypevalues;
        }
    
    }

这是我的存储库，它扩展了JpaRepository

public interface SingleQuestionRepository extends JpaRepository<SingleQuestions,Integer>{
        
    }

这是控制器类

@RestController
    @RequestMapping("/singleques")
    @CrossOrigin(origins = "*")
    public class SingleQuestionController {
        private SingleQuestionRepository singleQuestionRepository;
    
        public SingleQuestionController(SingleQuestionRepository singleQuestionRepository) {
            this.singleQuestionRepository = singleQuestionRepository;
        }
    
        @GetMapping("/getall")
        Collection<SingleQuestions> getquestions() {
            return singleQuestionRepository.findAll();
        }
    }

但是当我在控制器类中运行getquestions()函数时，它给出了以下错误。

nested exception is org.hibernate.type.SerializationException: could not deserialize
    org.springframework.orm.jpa.JpaSystemException: could not deserialize; nested exception is org.hibernate.type.SerializationException: could not deserialize
        at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:353)
        at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:255)