为什么我的代码会抛出“bean 非托管异常”？

Question

在我开始在我的数据源配置 class 中添加更多的存储库和实体包之前，我的代码仅在单个存储库 package 上运行良好。 代码因异常而失败： ... Error creating bean with name 'waecChemistryObjRepo' defined in com.example.resource.akademiks.waec.obj.dao.WaecChemistryObjRepo defined in @EnableJpaRepositories declared on AkademiksDbConfig: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.example.resource.akademiks.waec.obj.entity.WaecChemistryObj ... Error creating bean with name 'waecChemistryObjRepo' defined in com.example.resource.akademiks.waec.obj.dao.WaecChemistryObjRepo defined in @EnableJpaRepositories declared on AkademiksDbConfig: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.example.resource.akademiks.waec.obj.entity.WaecChemistryObj

主数据源配置 class：

@EnableTransactionManagement
@EnableJpaRepositories(basePackages = {"com.example.resource.akademiks.waec.obj.dao",
        "com.example.resource.akademiks.waec.theory.dao", "com.example.resource.akademiks.waec.theory.answer.dao"},
 entityManagerFactoryRef = "akademiksEntityManagerFactory",
 transactionManagerRef = "akademiksTransactionManager")
public class AkademiksDbConfig {
    
    @Bean
    @Primary
    @ConfigurationProperties("spring.datasource.waecakademiks")
    public DataSourceProperties akademiksDataSourceProperties() {
        
        return new DataSourceProperties();
    }
    
    @Primary
    @Bean
    @ConfigurationProperties("spring.datasource.waecakademiks")
    public DataSource akademiksDataSource() {
        
        return akademiksDataSourceProperties().initializeDataSourceBuilder()
                .type(HikariDataSource.class).build();
        
    }
    
    
    @Primary
    @Bean(name = "akademiksEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean 
    akademiksEntityManagerFactory(EntityManagerFactoryBuilder builder) {
        
        return builder
                .dataSource(akademiksDataSource())
                .packages("com.example.resource.akademiks.waec.obj.entity")
                .packages("com.example.resource.akademiks.waec.theory.questions.entity")
                .packages("com.example.resource.akademiks.waec.theory.answer.entity")
                .build();
                
    }
    
    @Primary
    @Bean
    public PlatformTransactionManager akademiksTransactionManager(
            @Qualifier("akademiksEntityManagerFactory")
            LocalContainerEntityManagerFactoryBean akademiksEntityManagerFactory
            ) {
        return new JpaTransactionManager(akademiksEntityManagerFactory.getObject());
    }
    
}

存储库：

package com.example.resource.akademiks.waec.obj.dao;

@Repository
@RepositoryRestResource(collectionResourceRel = "chemistry", path = "chemistry")
public interface WaecChemistryObjRepo extends JpaRepository<WaecChemistryObj, Integer> {

服务层：

 package com.example.resource.akademiks.waec.theory.chemistry.service;

public interface WaecChemistryTheoryService {}

服务实现：

 @Service
   public class WaecChemistryObjServiceImpl implements WaecChemistryObjService {
  @Autowired
 private WaecChemistryObjOptionRepo chemistryOptionRepo;

实体 class：

package com.example.resource.akademiks.waec.obj.entity;

@Entity
@Table(name = "WaecChemistryObjAnswer")
public class WaecChemistryObjAnswer {

其他实体和存储库已被排除在外。

Answer 1

packages方法采用 varargs 参数：

EntityManagerFactoryBuilder.Builder packages(String... packagesToScan)

您调用它 3 次，而不是在一次调用中传递 3 个包。

更一般地说：利用自动配置并遵循配置方法的约定，如评论中所建议的那样。