如何使用spring boot控制器将javascript变量保存到我的sql中？

// 导入相关的包

@Controller
public class MyController {

    @Autowired
    private MyDao myDao;

    @RequestMapping("/saveData")
    public String saveData(@RequestParam("data") String data) {
        MyEntity entity = new MyEntity(data);
        myDao.save(entity);
        return "success";
    }
}

@Entity
@Table(name = "my_table")
public class MyEntity {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String data;

    // 构造方法、Getter和Setter等省略

}

@Repository
public interface MyDao extends JpaRepository<MyEntity, Long> {

}

// 在application.properties中配置数据库连接信息

spring.datasource.url=jdbc:mysql://localhost:3306/my_database
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

spring.jpa.hibernate.ddl-auto=update