Question

我正在尝试创建spring-mvc项目。

我的“存储库”组件定义为

@Repository("testEntityDao")
public class TestEntityDaoImpl extends GenericDaoImpl<TestEntity> implements TestEntityDao {

具有TestEntityDao实例的“Service”组件

@Service("testManager")
public class TestManagerServiceImpl implements TestManagerService{
    @Autowired
    TestEntityDao testEntityDao;

TestManagerServiceImpl没有定义任何构造函数，也没有testEntityDao的getter和setter。（我在编写setter之后尝试了代码，但是得到了同样的错误）。

ApplicationContext.xml具有以下行以启用按名称自动装配

<beans xmlns="http://www.springframework.org/schema/beans"
    .
    .
    default-autowire="byName">

    <context:annotation-config />
    <context:component-scan
        base-package= .... />

web.xml

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:ApplicationContext.xml</param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

我得到的错误是

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testManager': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.test.cms.dao.TestEntityDao com.test.cms.service.impl.TestManagerServiceImpl.testEntityDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.test.cms.dao.TestEntityDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=testEntityDao)}

如何解决此错误？

Answer 1

只需引用通用父包而不是所有这些包。将组件扫描为：

    <context:component-scan base-package="com.test.cms"/>

byName基于注释的自动装配（Spring3）

1 个答案: