使用Spring Boot / Spring Data，我向所有存储库添加了自定义功能。这是我所做的一个片段：
所以我有我的存储库接口：
@NoRepositoryBean
public interface RepositoryBase<T, ID extends Serializable> extends JpaRepository<T, ID> {
及其实现
public class RepositoryBaseImpl<T, ID extends Serializable> extends SimpleJpaRepository<T, ID> implements RepositoryBase<T, ID> {
@Autowired
MessageLocale messageLocale; // <- this is a classic spring bean which is not injected in this spot (always null)
private EntityManager entityManager;
public RepositoryBaseImpl(JpaEntityInformation<T, ?> entityInformation, EntityManager entityManager) {
super(entityInformation, entityManager);
this.entityManager = entityManager;
}
//... My custom methods here
和我的配置：
@Configuration
@EnableJpaRepositories(basePackages = "my.base.pkg", repositoryBaseClass = RepositoryBaseImpl.class)
public class RepositoryConfig {
}
我的自定义方法可以正常工作，但是我需要注入messageLocal
Autowired在RepositoryBaseImpl内不起作用（我认为这是因为它不是bean）
我无法在RepositoryBaseImpl上添加@Repository，因为我在其父接口上使用了@NoRepositoryBean
那么有没有办法注入messageLocale？
最佳答案
基于@Prabhakar D评论，我将根据需要发布答案（使用@EnableJpaRepositories以及@EnableMongoRepositories和其他一些小修改）
在@EnableJpaRepositories批注中，添加repositoryFactoryBeanClass：
@EnableJpaRepositories(basePackages = "my.base.pkg", repositoryBaseClass = RepositoryBaseImpl.class, repositoryFactoryBeanClass = MyRepositoryFactoryBean.class)
关键是可以在repositoryFactoryBeanClass中使用@Autowire
创建一个repositoryFactoryBeanClass并在其中自动装配您的bean。这是一个Spring bean，它在覆盖的方法createRepositoryFactory中创建自定义JpaRepositoryFactory：
public class MyRepositoryFactoryBean<T extends JpaRepository<S, ID>, S, ID extends Serializable> extends JpaRepositoryFactoryBean<T, S, ID> {
@Autowired
private MessageLocale messageLocale;
public MyRepositoryFactoryBean(Class repositoryInterface) {
super(repositoryInterface);
}
@Override
protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {
return new MyJpaRepositoryFactory(entityManager, messageLocale);
}
}
现在，创建自定义工厂（MyJpaRepositoryFactory）并使用重写的方法getTargetRepository创建基础存储库（RepositoryBaseImpl）的实例。在这里，您可以将bean注入其构造函数中：
public class MyJpaRepositoryFactory extends JpaRepositoryFactory {
private EntityManager entityManager;
private MessageLocale messageLocale;
public MyJpaRepositoryFactory(EntityManager entityManager, MessageLocale messageLocale) {
super(entityManager);
this.entityManager = entityManager;
this.messageLocale = messageLocale;
}
//****************** Edit ********************
//starting from spring boot 2.1.0, getTargetRepository(RepositoryInformation information) was made final. So you can't override it anymore. You will need to override getTargetRepository(RepositoryInformation information, EntityManager entityManager)
//@Override
//protected Object getTargetRepository(RepositoryInformation information) {
// return new RepositoryBaseImpl(getEntityInformation(information.getDomainType()), entityManager, messageLocale);
//}
@Override
protected JpaRepositoryImplementation<?, ?> getTargetRepository(RepositoryInformation information, EntityManager entityManager) {
return new RepositoryBaseImpl(getEntityInformation(information.getDomainType()), entityManager, messageLocale);
}
//****************** End Edit ********************
}
现在，只需修改RepositoryBaseImpl的构造函数，使其可以接受所需的Bean：
public class RepositoryBaseImpl<T, ID extends Serializable> extends SimpleJpaRepository<T, ID> implements RepositoryBase<T, ID> {
private MessageLocale messageLocale;
private EntityManager entityManager;
//if you are using IntelliJ, it can show you an error saying "Could not autowire. No beans of JpaEntityInformation". It is just a bug in IntelliJ
public RepositoryBaseImpl(JpaEntityInformation<T, ?> entityInformation, EntityManager entityManager, MessageLocale messageLocale) {
super(entityInformation, entityManager);
this.entityManager = entityManager;
this.messageLocale = messageLocale;
}
//... My custom methods here
现在，您的messageLocal已注入BaseRepositoryImpl中，您可以在自定义方法中使用它，而不必在参数中传递它
希望这会帮助某人