Nas*_*din 4 java rest spring-data-jpa spring-boot
我正在使用 Spring Boot 实现休息服务。实体类在单独的包中定义。所以我在Application.java中添加了Component注解。
@Configuration
@EnableAutoConfiguration
@ComponentScan("org.mdacc.rists.cghub.model")
@EnableJpaRepositories(basePackages = "org.mdacc.rists.cghub.model")
public class Application
{
public static void main( String[] args )
{
SpringApplication.run(Application.class, args);
}
}
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这是我的控制器类:
// SeqController.java
@RestController
public class SeqController {
@Autowired
private SeqService seqService;
@RequestMapping(
value = "/api/seqs",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<List<SeqTb>> getSeqs() {
List<SeqTb> seqs = seqService.findAll();
return new ResponseEntity<List<SeqTb>>(seqs, HttpStatus.OK);
}
}
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我还创建了一个 JPA 数据存储库,它扩展了 JPARepository,我在其中添加了自定义查询代码。
// SeqRepository.java
@Repository
public interface SeqRepository extends JpaRepository<SeqTb, Integer> {
@Override
public List<SeqTb> findAll();
@Query("SELECT s FROM SeqTb s where s.analysisId = :analysisId")
public SeqTb findByAnalysisId(String analysisId);
}
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下面是实现服务接口的servicebean类
// SeqServiceBean.java
@Service
public class SeqServiceBean implements SeqService {
@Autowired
private SeqRepository seqRepository;
@Override
public List<SeqTb> findAll() {
List<SeqTb> seqs = seqRepository.findAll();
return seqs;
}
public SeqTb findByAnalysisId(String analysisId) {
SeqTb seq = seqRepository.findByAnalysisId(analysisId);
return seq;
}
}
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当我启动应用程序并在浏览器中输入以下网址“ http://localhost:8080/api/seqs ”时,出现 404 错误。我错过了什么?
编辑 #1:我决定取出 JPA 存储库内容并将控制器类更改为以下内容:
@RestController
//@RequestMapping("/")
public class SeqController {
private static BigInteger nextId;
private static Map<BigInteger, Greeting> greetingMap;
private static Greeting save(Greeting greeting) {
if(greetingMap == null) {
greetingMap = new HashMap<BigInteger, Greeting>();
nextId = BigInteger.ONE;
}
greeting.setId(nextId);
nextId = nextId.add(BigInteger.ONE);
greetingMap.put(greeting.getId(), greeting);
return greeting;
}
static {
Greeting g1 = new Greeting();
g1.setText("Hello World!");
save(g1);
Greeting g2 = new Greeting();
g1.setText("Hola Mundo!");
save(g2);
}
@RequestMapping(
value = "/api/greetings",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Collection<Greeting>> getGreetings() {
Collection<Greeting> greetings = greetingMap.values();
return new ResponseEntity<Collection<Greeting>>(greetings, HttpStatus.OK);
}
}
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当我启动应用程序并在浏览器中输入“localhost:8080/api/greetings”时,我仍然得到 404。
==>您是否确保您的 Spring Boot 应用程序类和您的 Rest Controller 在同一个基础包中?例如,如果您的 Spring Boot 应用程序类包是 com.example.demo,那么您的 Rest Controller 应该与 com.example.demo.controller 位于相同的基本包中。
==>我认为这就是 boot 无法映射到您的 rest 控制器的 uri 的原因。因为@SpringBootApplication 已经嵌入了@ComponentScan 和@Configuration。尝试这样做。我希望它有效。
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