可以将 组件和服务配置为产生过滤器，因此我们可以指定目标服务和控制器，并同时排除其他所有内容：
@ComponentScan(
basePackageClasses = {
MyTargetService.class,
MyTargetController.class
},
useDefaultFilters = false,
includeFilters = {
@ComponentScan.Filter(type = ASSIGNABLE_TYPE, value = MyTargetService.class),
@ComponentScan.Filter(type = ASSIGNABLE_TYPE, value = MyTargetController.class)
}
)
这不太可能适用于存储库，但幸运的是，@EnableJpaRepositories支持相同类型的过滤器：
@EnableJpaRepositories(
basePackageClasses = {
MyTargetRepository.class
},
includeFilters = {
@ComponentScan.Filter(type = ASSIGNABLE_TYPE, value = MyTargetRepository.class)
}
)
这部分比较棘手，因为@EntityScan不支持这些过滤器。尽管这些实体未引用Spring Bean，但我更喜欢仅加载测试所需的实体。我找不到支持过滤的实体的任何注释，但是我们可以使用中的来PersistenceUnitPostProcessor以编程方式过滤它们EntityManagerFactory。这是我的完整解决方案：
//add also the filtered @ComponentScan and @EnableJpaRepositories annotations here
@Configuration
public class MyConfig {
//here we specify the packages of our target entities
private static String[] MODEL_PACKAGES = {
"com.full.path.to.entity.package1",
"com.full.path.to.entity.package2"
};
//here we specify our target entities
private static Set<String> TARGET_ENTITIES = new HashSet<>(Arrays.asList(
"com.full.path.to.entity.package1.MyTargetEntity1",
"com.full.path.to.entity.package2.MyTargetEntity2"
));
@Bean
public DataSource getDataSource() {
EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
return builder.setType(EmbeddedDatabaseType.H2).build();
}
@Bean
public EntityManagerFactory entityManagerFactory() {
ReflectionsPersistenceUnitPostProcessor reflectionsPersistenceUnitPostProcessor = new ReflectionsPersistenceUnitPostProcessor();
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setGenerateDdl(true);
vendorAdapter.setShowsql(true);
LocalContainerEntityManagerfactorybean factory = new LocalContainerEntityManagerfactorybean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan(MODEL_PACKAGES);
factory.setDataSource(getDataSource());
factory.setPersistenceUnitPostProcessors(reflectionsPersistenceUnitPostProcessor);
factory.afterPropertiesSet();
return factory.getObject();
}
@Bean
public PlatformTransactionManager transactionManager() {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory());
return txManager;
}
public class ReflectionsPersistenceUnitPostProcessor implements PersistenceUnitPostProcessor {
@Override
public void postProcessPersistenceUnitInfo(MutablePersistenceUnitInfo pui) {
Reflections r = new Reflections("", new TypeAnnotationsScanner());
Set<Class<?>> entityClasses = r.getTypesAnnotatedWith(Entity.class, true);
Set<Class<?>> mappedSuperClasses = r.getTypesAnnotatedWith(MappedSuperclass.class, true);
pui.getManagedClassNames().clear(); //here we remove all entities
//here we add only the ones we are targeting
for (Class<?> clzz : mappedSuperClasses) {
if (TARGET_ENTITIES.contains(clzz.getName())) {
pui.addManagedClassName(clzz.getName());
}
}
for (Class<?> clzz : entityClasses) {
if (TARGET_ENTITIES.contains(clzz.getName())) {
pui.addManagedClassName(clzz.getName());
}
}
}
}
}
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