Question

运行.sh文件时出现此错误：

Error creating bean with name 'frdParameterRule2DAO' defined in class path resource [com/.../beans.xml]: 
Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: 
Could not instantiate bean class [com.....dao.FrdParameterRule2DAO]: Specified class is an interface

这是文件.sh执行的代码（我省略了不必要的代码）：

public final class FraudCacheBatchJob {
    private static final String CLASS_NAME = FraudCacheBatchJob.class.getCanonicalName();
    private static final String CONTEXT_XML_NAME = "/beans.xml";

    private static String getPackageLocation() {
        return FraudCacheBatchJob.class.getPackage().getName().replace(".", "/");
    }

    public static void main(String[] args) {
        try {
            ApplicationContext context = new ClassPathXmlApplicationContext(getPackageLocation() + CONTEXT_XML_NAME);

            CachedRule cachedRule = context.getBean("cachedRule", CachedRule.class);

            cachedRule.getCacheRule2();
        } catch (Exception ex) {
        }
    }
}

CachedRule：

public interface CachedRule {
    void getCacheRule2();

    ...
}

CachedRuleImpl：

@Service("CachedRule")
public class CachedRuleImpl implements CachedRule {
    @Autowired
    FrdParameterRule2DAO frdParameterRule2DAO;

    @Cacheable(value = "ruleCache", key = "'cache-getFrdRule2'")
    public void getCacheRule2() {
        frdParameterRule2DAO.findAll();
    }

    ...
}

FrdParameterRule2DAO：

public interface FrdParameterRule2DAO extends JpaRepository<parameterRule, Long> {
    ...
}

beans.xml：

<bean id="frdParameterRule2DAO" class="com.....dao.FrdParameterRule2DAO"></bean>
<bean id="cachedRule" class="com.....spring.fraud.rule.CachedRuleImpl">
    <property name="frdParameterRule2DAO" ref="frdParameterRule2DAO" />
</bean>

当我尝试将DAO更改为public class时，我收到错误：

The type JpaRepository<FrdParameterRule2,Long> cannot be the superclass of FrdParameterRule2DAO; a superclass must be a class

我该怎么办？感谢。

修改

我试过这个（@StanislavL）：

FrdParameterRule2DAO：

@Repository
public interface FrdParameterRule2DAO extends JpaRepository<parameterRule, Long> {
    ...
}

beans.xml：

<!-- <bean id="frdParameterRule2DAO" class="com.....dao.FrdParameterRule2DAO"></bean> -->
<bean id="cachedRule" class="com.....spring.fraud.rule.CachedRuleImpl">
    <property name="frdParameterRule2DAO" ref="frdParameterRule2DAO" />
</bean>

然后得到：

Error creating bean with name 'cachedRule' defined in class path resource [com/.../beans.xml]: Cannot resolve reference to bean 'frdParameterRule2DAO' while setting bean property 'frdParameterRule2DAO'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'frdParameterRule2DAO' is defined

Answer 1

从xml中删除bean id="frdParameterRule2DAO"并添加

@Repository
FrdParameterRule2DAO frdParameterRule2DAO;

改为使用CachedRuleImpl。

还有一件事

您有interface FrdParameterRule2DAO extends JpaRepository<parameterRule, Long>但希望列出其他实体List<FrdParameterRule2> result = frdParameterRule2DAO.findAll()

可能是实体类差异。

在运行文件时获取“指定类是一个接口”

1 个答案: