java - 无法在 spring boot 中获取用户名

Question

问题是:当我使用 JpaRepository 并使用如下代码通过用户名获取用户的方法时:

public interface UserRepository extends JpaRepository<User, Integer> {

    @Query(value = "select * from users where username = :name", nativeQuery = true)
    User findUserByName(@Param("name") String name);
}

这是实体:

@Entity
@Table(name = "users")
@Data
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @Column(name = "username", nullable = false, unique = true)
    private String username;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "joined_date", nullable = false, unique = true)
    @CreatedDate
    private Date joinedDate;

    @Column(name = "password")
    private String password;

    @Column(name = "bio")
    private String bio;

    @Column(name = "email", nullable = false, unique = true)
    private String email;
}   

这是 Controller :

@RestController
@RequestMapping("/u")
public class UserController {
    @Autowired
    private UserRepository repo;
    ....

    @GetMapping("/{name}")
    public ResponseEntity<User> getUsernameAndPasswordByName(@PathVariable("name") String name) {
        User user = repo.findUserByName(name);

        if(user == null) {
            return new ResponseEntity(HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<User>(user, HttpStatus.OK);
    }
}

这是从数据库中获取所有用户时的 JSON 的全部数据:

当我从名称中获取用户时(url:localhost/u/{username}):

我保证从 URL 输入的名称是正确的。

Answer 1

你有两个具有相同映射的方法

1 - getUsernameAndPasswordByName(@PathVariable("name") String name)
@GetMapping("/{name}")
2 - getUserById(@PathVariable("id") int id)
@GetMapping("/{id}")

这对于 spring 来说是模棱两可的；只需将其中一个映射更改为如下所示:

@GetMapping("/find-by-id/{id}")