如何在springboot中添加额外属性到请求体和插入到数据库中

// 实体类
@Entity
@Table(name = "example_table")
public class ExampleEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    // 额外属性
    private String extraProperty;

    // 省略构造方法、getter和setter
}

// 数据访问对象
@Repository
public interface ExampleRepository extends JpaRepository<ExampleEntity, Long> {
}

// 控制器
@RestController
@RequestMapping("/example")
public class ExampleController {
    @Autowired
    private ExampleRepository exampleRepository;

    @PostMapping("/add")
    public String addExample(@RequestParam String name, @RequestParam String extraProperty) {
        ExampleEntity example = new ExampleEntity();
        example.setName(name);
        example.setExtraProperty(extraProperty);

        exampleRepository.save(example);

        return "Example added successfully";
    }
}