Spring MVC：如何从自定义接口实现 DAO

Question

我的目的是实现自定义 DAO 接口，这就是我所做的，但它似乎不起作用。

我的界面是：

public interface AbstractDAO<T> {

    void add(T object);
    T load(Integer ID);
    List<T> list();
    void update(T object);
    void delete(Integer ID);
}

它的实现：

@Repository
public class AccountDAO implements AbstractDAO<Account> {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Transactional
    public void add(Account object) {
        ...
    }
...
}

正如我所说，由于 Spring 扫描器无法找到 dao class。

，所以它不起作用

如何让它发挥作用？没有 implements 它工作正常。

Spring扫描仪配置：

<bean ...>
   <context:component-scan base-package="dao" />
   <context:component-scan base-package="tmp" />
   <context:component-scan base-package="services" />
   <context:component-scan base-package="entities" />

   <mvc:resources mapping="/resources/**" location="/resources/" />

   <mvc:annotation-driven />
   <tx:annotation-driven />
   <task:annotation-driven />

   <import resource="spring-beans.xml"/>
</bean>

错误：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: 
No qualifying bean of type [dao.AccountDAO] found for dependency: expected
at least 1 bean which qualifies as autowire candidate for this dependency

Answer 1

将 DAO 实现更改为：

@Repository("accountDAO")
public class AccountDAO implements AbstractDAO<Account> {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Transactional
    public void add(Account object) {
        ...
    }
    ...
}

和 DAO 的用法如：

@Controller
@RequestMapping(value = "")
public class Controller

    @Autowired
    @Qualifier("accountDAO")
    private AbstractDAO accountDAO;

    .....
}

Spring MVC：如何从自定义接口实现 DAO

Spring MVC: how to implement DAO from custom interface

java

spring

spring-mvc

dao

implements