我试图创建我的第一个Spring Back-end简单应用程序,用于存储音乐专辑。不幸的是,我创建的端点都没有工作(我使用邮递员对其进行了测试,请求返回404,未找到)。 以下是我所有与项目相关的文件/代码:
<button class="btn active" onclick="filterSelection('google')"> Show all</button>
我尝试过的事情:
使用包添加@ComponentScan:
@ComponentScan({“ com.musesite.dao”,“ com.musesite.model”,“ com.musesite.musesitebackend”,“ com.musesite.restful”}}
结果:@Repostiory
public interface AlbumRepository extends Repository<Album,Long> {
@Query(value = "SELECT * FROM album", nativeQuery = true)
List<Album> findAlbums();
Album save(Album persisted);
}
@Service
public class AlbumService {
@Autowired
private AlbumRepository albumRepository;
public void saveData(Album album) {
this.albumRepository.save(album);
}
public List<Album> getAllAlbums() {
return this.albumRepository.findAlbums();
}
@PostConstruct
private void init() {}
}
@Entity
@Table(name="album")
public class Album {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@Column(name="title")
private String title;
}
@RestController
public class AlbumController {
@Autowired
AlbumService albumService;
@RequestMapping(method=RequestMethod.POST, path="/album/post")
public ResponseEntity<String> addAlbum(@RequestBody Album album) {
albumService.saveData(album);
return new ResponseEntity<String>(HttpStatus.OK);
}
@RequestMapping(method=RequestMethod.GET, path="/album/get")
Iterable<Album> getAlbums() {
return albumService.getAllAlbums();
}
}
@SpringBootApplication
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
public class MusesiteBackEndApplication {
public static void main(String[] args) {
SpringApplication.run(MusesiteBackEndApplication.class, args);
}
@Bean
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource dataSource() {
return DataSourceBuilder.create().build();
}
}
添加应创建数据库的dataSource方法。
@Bean @ConfigurationProperties(前缀=“ spring.datasource”) public DataSource dataSource(){ 返回DataSourceBuilder.create()。build(); }
结果:无。
在Field albumRepository in com.musesite.dao.AlbumService required a bean of type 'com.musesite.dao.AlbumRepository' that could not be found.
中添加scanBasePackages
:
@SpringBootApplication(scanBasePackages = { “ com.musesite.dao”,“ com.musesite.model”,“ com.musesite.musesitebackend”,“ com.musesite.restful”}}
结果:SpringBootApplication
不幸的是,他们都没有帮助。
答案 0 :(得分:-1)
尝试这种方式:
public interface AlbumRepository extends JpaRepository<Album,Long> {
}
您不需要创建本机查询。 您可以使用findAll()和save(album),而无需任何其他代码。 (它们是自动生成的)
---编辑
糟糕!还将以下注释添加到您的配置类之一:
@EnableJpaRepositories