我引用了这个 springboot
教程,我在我的项目中使用了 spring data
,我试图添加 data to database
。当我尝试使用以下 .
bt 时,我收到一条错误消息
这是我的代码,
//my controller
@RequestMapping("/mode")
public String showProducts(ModeRepository repository){
Mode m = new Mode();
m.setSeats(2);
repository.save(m); //this is where the error getting from
return "product";
}
//implementing crud with mode repository
@Repository
public interface ModeRepository extends CrudRepository<Mode, Long> {
}
//my mode class
@Entity
@Table(name="mode")
public class Mode implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(unique=true, nullable=false)
private int idMode;
@Column(nullable=false)
private int seats;
//assume that there are getters and setters
}
我是
springboot
的新手,有人能告诉我我做错了什么吗?如果有人能给我提供一个链接来了解
springdata
,我将不胜感激除了
spring documentation
最佳答案
更改您的 Controller 代码,使 ModeRepository 成为私有(private)的 Autowiring 字段。
@Autowired //don't forget the setter
private ModeRepository repository;
@RequestMapping("/mode")
public String showProducts(){
Mode m = new Mode();
m.setSeats(2);
repository.save(m); //this is where the error getting from
return "product";
}