Java Spring要求至少有一个bean符合此依赖项的autowire候选项的条件
我正在使用Spring和Hibernate,并试图“连接”必要的类,以便在服务中自动连接存储库 Repository类扩展了Crudepository 停止存储库Java Spring要求至少有一个bean符合此依赖项的autowire候选项的条件,java,spring,hibernate,Java,Spring,Hibernate,我正在使用Spring和Hibernate,并试图“连接”必要的类,以便在服务中自动连接存储库 Repository类扩展了Crudepository 停止存储库 @Repository @RepositoryRestResource(collectionResourceRel = "stop", path = "stop") public interface StopRepository extends CrudRepository<StopJPA, Long> { St
@Repository
@RepositoryRestResource(collectionResourceRel = "stop", path = "stop")
public interface StopRepository extends CrudRepository<StopJPA, Long> {
StopJPA findById(@Param("id") Long id);
StopJPA findByIdStop(@Param("idStop") String idStop);
@Override
void delete(StopJPA deleted);
@Override
List<StopJPA> findAll();
// Optional<StopJPA> findOne(Long id);
@Override
StopJPA findOne(Long id);
@Override
StopJPA save(StopJPA persisted);
void flush();
}
@Entity
@Table(name = "stop")
@EntityListeners(RepoListener.class)
public class StopJPA implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@Column(name = "stop_description")
private String stopDescription;
@Column(name = "id_stop", nullable = false)
private String idStop;
public StopJPA() {
}
public StopJPA(String stopDescription, String idStop) {
this.stopDescription = stopDescription;
this.idStop = idStop;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getStopDescription() {
return stopDescription;
}
public void setStopDescription(String stopDescription) {
this.stopDescription = stopDescription;
}
public String getIdStop() {
return idStop;
}
public void setIdStop(String idStop) {
this.idStop = idStop;
}
}
@EnableWebMvc
@Configuration
//@EnableJpaRepositories
@ComponentScan(basePackages = { "com.project.app" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private Environment env;
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("hello");
}
@Bean
public ApplicationContextProvider applicationContextProvider() {
return new ApplicationContextProvider();
}
}
以及服务类实现:
停止服务
@Service
final class RepoStopService {
@Service
final class RepoStopService {
private final StopRepository stopRepository;
@Autowired
RepoStopService(StopRepository stopRepository) {
this.stopRepository = stopRepository;
}
}
不幸的是,当我尝试在服务器上运行它时,出现以下异常:
严重:向侦听器发送上下文初始化事件时发生异常
类的实例org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.unsatifiedDependencyException: 创建文件中定义了名为“repoStopService”的bean时出错 …\RepoStopService.class:
通过具有的构造函数参数表示的未满足的依赖项 类型的索引0 [com.project.app.services.repositories.StopRepository]::否 类型的限定bean 找到的[com.project.app.services.repositories.StopRepository] 依赖项:至少需要1个符合autowire条件的bean 此依赖项的候选项。依赖项注释:{}强>
@Repository
@RepositoryRestResource(collectionResourceRel = "stop", path = "stop")
public interface StopRepository extends CrudRepository<StopJPA, Long> {
StopJPA findById(@Param("id") Long id);
StopJPA findByIdStop(@Param("idStop") String idStop);
@Override
void delete(StopJPA deleted);
@Override
List<StopJPA> findAll();
// Optional<StopJPA> findOne(Long id);
@Override
StopJPA findOne(Long id);
@Override
StopJPA save(StopJPA persisted);
void flush();
}
@Entity
@Table(name = "stop")
@EntityListeners(RepoListener.class)
public class StopJPA implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@Column(name = "stop_description")
private String stopDescription;
@Column(name = "id_stop", nullable = false)
private String idStop;
public StopJPA() {
}
public StopJPA(String stopDescription, String idStop) {
this.stopDescription = stopDescription;
this.idStop = idStop;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getStopDescription() {
return stopDescription;
}
public void setStopDescription(String stopDescription) {
this.stopDescription = stopDescription;
}
public String getIdStop() {
return idStop;
}
public void setIdStop(String idStop) {
this.idStop = idStop;
}
}
@EnableWebMvc
@Configuration
//@EnableJpaRepositories
@ComponentScan(basePackages = { "com.project.app" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private Environment env;
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("hello");
}
@Bean
public ApplicationContextProvider applicationContextProvider() {
return new ApplicationContextProvider();
}
}
嵌套异常是
org.springframework.beans.factory.noSuchBean定义异常:否
类型的限定bean
找到的[com.project.app.services.repositories.StopRepository]
依赖项:至少需要1个符合autowire条件的bean
此依赖项的候选项。依赖项批注:{}at
有人知道为什么Spring没有选择@Repository注释吗
我的配置包含3个文件。 一个实现WebApplicationInitializer的AppInitializer类,一个扩展WebMVCConfigureAdapter的WebMvcConfig类,最后是一个PersistentContext类 AppInitializer
public class AppInitializer implements WebApplicationInitializer {
private static final String CONFIG_LOCATION = "com.project.app.config";
private static final String MAPPING_URL = "/";
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
// Create the 'root' Spring application context
WebApplicationContext context = getContext();
// Manage the lifecycle of the root application context
servletContext.addListener(new ContextLoaderListener(context));
// Register and map the dispatcher servlet
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet",
new DispatcherServlet(context));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping(MAPPING_URL);
}
private AnnotationConfigWebApplicationContext getContext() {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.setConfigLocation(CONFIG_LOCATION);
return context;
}
WebMvcConfig
@Repository
@RepositoryRestResource(collectionResourceRel = "stop", path = "stop")
public interface StopRepository extends CrudRepository<StopJPA, Long> {
StopJPA findById(@Param("id") Long id);
StopJPA findByIdStop(@Param("idStop") String idStop);
@Override
void delete(StopJPA deleted);
@Override
List<StopJPA> findAll();
// Optional<StopJPA> findOne(Long id);
@Override
StopJPA findOne(Long id);
@Override
StopJPA save(StopJPA persisted);
void flush();
}
@Entity
@Table(name = "stop")
@EntityListeners(RepoListener.class)
public class StopJPA implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@Column(name = "stop_description")
private String stopDescription;
@Column(name = "id_stop", nullable = false)
private String idStop;
public StopJPA() {
}
public StopJPA(String stopDescription, String idStop) {
this.stopDescription = stopDescription;
this.idStop = idStop;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getStopDescription() {
return stopDescription;
}
public void setStopDescription(String stopDescription) {
this.stopDescription = stopDescription;
}
public String getIdStop() {
return idStop;
}
public void setIdStop(String idStop) {
this.idStop = idStop;
}
}
@EnableWebMvc
@Configuration
//@EnableJpaRepositories
@ComponentScan(basePackages = { "com.project.app" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private Environment env;
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("hello");
}
@Bean
public ApplicationContextProvider applicationContextProvider() {
return new ApplicationContextProvider();
}
}
PersistentContext
@Component
@EnableTransactionManagement
@PropertySource("classpath:application.properties")
public class PersistenceContext {
@Autowired
private Environment env;
@Bean
@Primary
public DataSource dataSource() throws ClassNotFoundException {
DataSource ds = new DataSource();
String url = env.getProperty(SystemSettings.AMTAB_DS_URL);
String user = env.getProperty(SystemSettings.AMTAB_DS_USERNAME);
String pass = env.getProperty(SystemSettings.AMTAB_DS_PASSWORD);
String driver = env.getProperty(SystemSettings.AMTAB_DS_DRIVER);
// ds.setDriverClassName("org.postgresql.Driver");
ds.setDriverClassName(driver);
ds.setUrl(url);
ds.setUsername(user);
ds.setPassword(pass);
return ds;
}
@Bean
LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource);
entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
entityManagerFactoryBean.setPackagesToScan("com.project.app.services.entities");
Properties jpaProperties = new Properties();
// Configures the used database dialect. This allows Hibernate to create SQL
// that is optimized for the used database.
jpaProperties.put("hibernate.dialect",
env.getRequiredProperty(SystemSettings.HIBERNATE_DIALECT));
// Specifies the action that is invoked to the database when the Hibernate
// SessionFactory is created or closed.
jpaProperties.put("hibernate.hbm2ddl.auto",
env.getRequiredProperty(SystemSettings.HIBERNATE_HBM2DDL));
// Configures the naming strategy that is used when Hibernate creates
// new database objects and schema elements
// jpaProperties.put("hibernate.ejb.naming_strategy",
// env.getRequiredProperty(SystemSettings.HIBERNATE_NAMING_STRATEGY));
// If the value of this property is true, Hibernate writes all SQL
// statements to the console.
jpaProperties.put("hibernate.show_sql",
env.getRequiredProperty(SystemSettings.HIBERNATE_SHOW_SQL));
// If the value of this property is true, Hibernate will format the SQL
// that is written to the console.
jpaProperties.put("hibernate.format_sql",
env.getRequiredProperty(SystemSettings.HIBERNATE_FORMAT_SQL));
entityManagerFactoryBean.setJpaProperties(jpaProperties);
return entityManagerFactoryBean;
}
/**
* Because we are using JPA, we have to create a transaction manager bean that integrates the
* JPA provider with the Spring transaction mechanism. We can do this by using the
* JpaTransactionManager class as the transaction manager of our application.
*
* We can configure the transaction manager bean by following these steps:
*
* -> Create a new JpaTransactionManager object. -> Configure the entity manager factory whose
* transactions are managed by the created JpaTransactionManager object.
**/
@Bean
JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory);
return transactionManager;
}
}
解决方案
我只需要指定存储库的包,因为默认情况下,它是一个不会被搜索的位置-->@EnableJpaRepositories(“com.project.app.services.repositories”),您必须在@配置
类上声明@组件扫描
和@EnableJpaRepositories
注释
@Repository
@RepositoryRestResource(collectionResourceRel = "stop", path = "stop")
public interface StopRepository extends CrudRepository<StopJPA, Long> {
StopJPA findById(@Param("id") Long id);
StopJPA findByIdStop(@Param("idStop") String idStop);
@Override
void delete(StopJPA deleted);
@Override
List<StopJPA> findAll();
// Optional<StopJPA> findOne(Long id);
@Override
StopJPA findOne(Long id);
@Override
StopJPA save(StopJPA persisted);
void flush();
}
@Entity
@Table(name = "stop")
@EntityListeners(RepoListener.class)
public class StopJPA implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@Column(name = "stop_description")
private String stopDescription;
@Column(name = "id_stop", nullable = false)
private String idStop;
public StopJPA() {
}
public StopJPA(String stopDescription, String idStop) {
this.stopDescription = stopDescription;
this.idStop = idStop;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getStopDescription() {
return stopDescription;
}
public void setStopDescription(String stopDescription) {
this.stopDescription = stopDescription;
}
public String getIdStop() {
return idStop;
}
public void setIdStop(String idStop) {
this.idStop = idStop;
}
}
@EnableWebMvc
@Configuration
//@EnableJpaRepositories
@ComponentScan(basePackages = { "com.project.app" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private Environment env;
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("hello");
}
@Bean
public ApplicationContextProvider applicationContextProvider() {
return new ApplicationContextProvider();
}
}
关于@EnableJpaRepositories
:
注释以启用JPA存储库。默认情况下,将扫描带注释配置类的包以查找Spring数据存储库
在使用时,必须在@配置
类上声明@组件扫描
和@EnableJpaRepositories
注释
关于@EnableJpaRepositories
:
注释以启用JPA存储库。默认情况下,将扫描带注释配置类的包以查找Spring数据存储库
如果在将存储库类用作自动连线时出现此错误。 您只需要根据存储库类使用下面的注释 Mongo存储库:@enablemongorepositions(“spring.mongorestapi.repositories”)
JPA Repository:@EnableJPARepositories(“spring.jparestapi.repositories”)如果在使用存储库类作为自动连线时出现此错误。 您只需要根据存储库类使用下面的注释 Mongo存储库:@enablemongorepositions(“spring.mongorestapi.repositories”)
JPA存储库:@EnableJPARepositories(“spring.jparestapi.repositories”)很好。我更新了我的问题,并加入了我的配置文件。我照你说的做了,但它给了我和以前一样的错误。是不是(可能)因为我的配置文件不止这些?好的。问题解决了。我只需要指定存储库的包,因为它是默认情况下不会被搜索的位置-->@EnableJpaRepositories(“com.project.app.services.repositories”)。我更新了我的问题,并加入了我的配置文件。我照你说的做了,但它给了我和以前一样的错误。是不是(可能)因为我的配置文件不止这些?好的。问题解决了。我只需要指定存储库的包,因为它是默认情况下不会被搜索的位置-->@EnableJpaRepositories(“com.project.app.services.repositories”)