没有可用类型的合格 bean (Spring Data)

Question

当我尝试自动装配扩展 CrudRepository 的接口时出现此错误。我有两个用于 2 个数据库的休眠 xml 配置。完整的堆栈是

org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为“helloController”的bean时出错：通过字段“stockService”表示的依赖关系不满足；嵌套异常是 org.springframework.beans.factory.NoSuchBeanDefinitionException：没有“com.publishing.test.stock.services.StockService”类型的合格 bean 可用：预计至少有 1 个有资格作为自动装配候选者的 bean。依赖注解：{@org.springframework.beans.factory.annotation.Autowired(required=true)} org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)

<hibernate-configuration>

<session-factory>

    <!-- Database connection settings -->
    <property name="connection.driver_class">org.postgresql.Driver</property>
    <property name="connection.url"></property>
    <property name="connection.username"></property>
    <property name="connection.password"></property>

    <!-- JDBC connection pool (use the built-in) -->
     <property name="connection.pool_size">100</property>

    <!-- SQL dialect -->
    <property name="dialect">org.hibernate.dialect.PostgreSQL95Dialect</property>

    <!-- Disable the second-level cache -->
    <!--<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>-->

    <!-- Enable Hibernate's automatic session context management -->
    <property name="current_session_context_class">thread</property>

    <!-- Echo all executed SQL to stdout -->
    <property name="show_sql">true</property>

    <!-- Drop the existing table and create new one -->
    <property name="hbm2ddl.auto">update</property>

    <property name="packagesToScan">com.publishing</property>

    <!-- Mention here all the model classes -->
    <mapping class="com.publishing.models.Stock"/>

</session-factory>

@Controller
public class HelloController {


@Autowired
private StockService stockService;

我在 Spring Config 中也有 3 行

<context:component-scan base-package="com.publishing" />
<context:annotation-config />
<jpa:repositories base-package="com.publishing" />

服务是

@Service("StockService")
public interface StockService extends CrudRepository<Stock, Long> {

编辑：

好的，现在我们已经编辑了hibernate.cfg.xml

    <!-- Drop the existing table and create new one -->
    <property name="hbm2ddl.auto">update</property>

    <!--<property name="packagesToScan">com.publishing</property>-->

    <!-- Mention here all the model classes -->
    <mapping class="com.publishing.models.Stock"/>

还有服务

@Service("stockService")
public interface StockService extends CrudRepository<Stock, Long> {

Answer 1

这是因为您将 bean 定义为 StockService 并且您将其称为 stockService，这应该是相同的名称，在服务和控制器中都区分大小写。

所以 bean 定义应该从以下位置更新：

@Service("StockService")

收件人：

@Service("stockService")

因为您在控制器中使用stockService 引用它：

@Autowired
private StockService stockService;

注意：

还要确保你的 bean 是在 spring 的扫描包中定义的。